stihl 7 or 8 tooth sprocket
function random_imglink(){ Purchasing a chainsaw can be difficult for the first-time buyer. Relatively new here, and have a question. If you cut lots of hardwood, like oak and maple, or need to use a longer bar, then increased torque is what you need. Sturdy and durable, long service life. Find many great new & used options and get the best deals for Oregon 32064X Spur Sprocket Kit Stihl 048 048AV 3/8" 7 Tooth 1117 640 2001 at the best online prices at eBay! 1*Bearing. Brand: Flander; Price: 10.67: 10.67 + 5.94 Shipping. Do they both fit the same chains? Think first gear on a bicycle. Bore 13mm (0.5118) Bearing 10mm x 13mm x 10mm. The repair guy was a little hesitant at first about the 8 tooth just because he said he'd prefer putting the original equipment on it all else being equal. var xmlHttp = new XMLHttpRequest(); random_imglink() For a better experience, please enable JavaScript in your browser before proceeding. If you stand or lean on it the 8t will bog easier. .cardIcon-icon[data-test="credit-card-icon-jcb"] { display:none !important;} Highly matched to the original device. The mountain pine beetle epidemic required fast learning in the art of tree felling and subsequent forestry practices to direct the forest's regrowth. To increase the speed of the chain, increase the drive sprockets diameter. .cardIcon-icon[data-test="credit-card-icon-discover"] { display:none !important;} Sign up for newsletter today. It is our goal to develop a website that is accessible to everyone! JavaScript is disabled. Most of the saw mechanics are under paid, and for the most part know little about the equipment they work on. Is the rim sprocket better than the spur sprocket. (Or my home either), I'm agreeing with everyone else about using a 7. xmlHttp.send('{"store_id":"1001795454","timezone_offset":"-8","timestamp":"2023-03-01T19:15:43.42169300Z","visit_id":"e301ca96-e014-463f-b376-7f29a4e6438d","channel_id":1}'); 12-13 years, actually. 12-13 years, actually. Be careful who you learn or take advise from. I'm just curious what others use. $29.99 Only registered users can write reviews. run a 8 pin on my 650 with the 25" or 28" bar & it doesn't seem to care lol 9 pin with 18" (avatar pic) bar just for grins. Not all chainsaw owners know that the sprocket is just as important as the chain on a chainsaw. ry=1 Note: The real color of the item may be slightly different from the pictures . Does oregon make rim and drum systems for that saw? 10, Mo is bedder! We welcome any feedback Not sure you would be welcome in my local Stihl shop with the kind of attitude where you need to label people so. Changing your chainsaw's gearing will change the cutting characteristics of your saw. Children's Toy's, Chainsaw Models & Books etc. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) var BCData = {"csrf_token":"fd056dbd3ae4fc62a418e2f39ad197e2c930249f889a3662a81f255d5b2ca091","product_attributes":{"sku":"0000 642 1207","upc":null,"mpn":"0000 642 1207","gtin":null,"weight":null,"base":true,"image":null,"price":{"without_tax":{"formatted":"$11.99","value":11.99,"currency":"CAD"},"tax_label":"Tax"},"stock":null,"instock":true,"stock_message":null,"purchasable":true,"purchasing_message":null}}; Fit For ST MS661 MS660 066 MS650 MS640 064 070 090 088 etc Chainsaws. This can cause increased wear on the bar, chain, and clutch assembly. Rim sprockets float on the splined hub of the drum and move side to side, allowing the chain and rim to align with the bar as the chain travels around the bar's groove. Package Include: 1pc Rim Sprocket, Free Ground Shipping Power Mate Rim/Sprocket System 3/8" Pitch-7 Tooth fits Stihl Chain saws. That saw has an impressive amount of torque. myimages2[3]="../../../images/top-banner/behindtheforum.jpg" .cardIcon-icon[data-test="credit-card-icon-discover"] { display:none !important;} You must log in or register to reply here. Certification Other. Keep in mind that the entire cutting group needs to be taken into account when gearing your chainsaw. Chain and bar recommendation for Stihl 026 super, Fresh air kit adapter doesn't seem to fit. All rights reserved. We carry all top brands. OEM Replacement This part is aftermarket equipment designed to replace the original manufacturer's part numbers specified here. The 8 pin will produce more chain speed and maybe less power/torque. Timber Therapy is about managing 36 acres of alpine forest in north-central Colorado and its regenerative power for me, the "recreational forester". on Chainsaws, Started by Chelsea Tree with the 7 it doesnt seem to matter. Trusted SSL Protection, Amazing Selection We carry all top brands. imagelinks[3]="https://woodmizer.com/Store/Shop/Portable-Sawmills/LX25-Portable-Sawmill?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=lx25&utm_term=2023-02-10&utm_content=800x160" My brother has an 029 as well but his has the 3/8 chain on it. Spur sprockets do not come with bearings, and we recommend replacing the bearing for every 2 spur sprocket replacements. Changing the drive sprocket tooth count on your chainsaw will change its performance characteristics. Spur chain sprockets are durable, economical, simple to use, and very popular. I prefer 8t if the saw has the power for it. For A/R & A/P office admin inquires use walkerssaw@shaw.ca, 2023 Walker's Saw Shop LTD. Dont forget to adjust the oiler. Started by Great Big The Forestry Forum is sponsored in part by: .cardIcon-icon[data-test="credit-card-icon-maestro"] { display:none !important;} The 8 pin will give you about 15% more chain speed and 15% less torque. I cut mosty wood 20" and under and alot of cherry. In stock. Our 8-tooth sprockets conform to international ISO, DIN, or American ANSI standards. Most of the saw mechanics are under paid, and for the most part know little about the equipment they work. var imagelinks2=new Array() ry=1 TWO NEW DRUMS FOR STIHL 090 CHAINSAWS. View $19.95 Sold Out! var imagelinks=new Array() it looks like this: i do appreciate the insight on the 7 vs 8 tooth count. It has cut up a "few" large trees over the years. IT saved belts and made my sled really respond the way I like. imagelinks[5]="https://woodmizer.com/Store/Shop/Sawmill-Options/CookieMizer-Clamping-Jig?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=cookiemizer&utm_term=2021-03-09&utm_content=800x160" Changing a chainsaw's drive sprocket's tooth count is often called "gearing". I'm not a heavy user, but I am in a situation with several (~8) acres between myself, my brother and parents, with plenty of hardwoods around so something is in need of cutting perdiodically (died from stress, wind/storm blew it over, lighting struck, old age). 8 pin is rarely faster at the end of the day or a week of work (When you figure in all of the "stallouts"), and is a lot harder on your clutch and saw overall. Increasing the diameter/speed of the drive sprocket will reduce its applied power. Which do you prefer a 7 or 8 pin rim sprocket? Livraison gratuite. imagelinks2[3]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" my old, well-used Stihl chainsaw. Attention Please: This Sprocket Fit Inner Hole 19MM, Compare Well Before Order It. I have an 026 pro with .325 pitch, 16" bar. Bailey's is committed to keeping our site compliant with the American with Disabilities Act. I try to take decent care of the chains. Ask for details. //specify random images below. ADA Compliance Policy Unless you run a 12" bar run a 7 pin. An 8pin .404 is bigger than a 9pin .325 for example. Package arrived in a timely fashion and was well packaged. This sprocket is a perfect fit and assisted me in refurbishing my old, well-used Stihl chainsaw. Fit it to your saw and see for yourself. Geering can be done on both spur and rim type sprockets but is easier on a rim sprocket due to their modular nature. Cylinder Assemblies 152. imagelinks2[1]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1" imagelinks[4]="http://www.ezboardwalk.com/" or requests on how to improve this sites accessibilty for all users. Updated: 00/04/25 Baileys has it part#0rf 34162x 16 bucks. 0 Members and 1 Guest are viewing this topic. PowerType Petrol/Gas. The teeth of the chain sprocket press against the drive link tanks and the saw chain starts to rotate. This according to them in order to speed up chain speed. Out of the wood chain speed would be faster but a MS270 does not have the torque to pull an eight. Most of the saw mechanics are under paid, and for the most part know little about the equipment they work on. We welcome any feedback Free shipping for many products! For the best experience on our site, be sure to turn on Javascript in your browser. Stihl MS310 Stihl MS180 Dolmar 5100 Gooserider Mod Emeritus In stock Be the first to review this product Add to Cart I'll stick with a 7t if it struggles to bury the bar. But I bet it'll be fine. If you replace the components that. /* Clutch drum with rim. Car & Truck Safety & Security Accessories, item 1 Stihl OEM Spur Sprocket .325" 8T MS 290 310 390 034 036 1125-640-2008 #GM-F4B2, item 2 Stihl 029 039 MS310 MS290 MS390 sprocket clutch kit 3/8 pitch bearing worm gear, item 3 3/8'' Pitch 7 Teeth Sprocket Fits Stihl 029 034 036 039 MS290 MS360, item 4 New 3/8" SPROCKET Rim Drum FITS Stihl 029 034 036 039 MS290 MS310 MS360 MS390, item 5 USED OEM GENUINE STIHL 1125-640-2004 3/8" 7T SPROCKET MS290 MS390, item 6 325 Pitch Sprocket 7 Tooth Splined Fit Stihl 029 039 MS290 034 036 Chainsaws, item 7 Chainsaw 3/8" 7T Sprocket For Stihl 029,034,036,039,MS290 390 With Bearing, item 8 Myparts Sprocket 3/8" 7 teeth for STIHL Chainsaws 029 039 034 MS290 11256402000, 5.0 out of 5 stars based on 3 product ratings. Login with username, password and session length, Quote from: Al_Smith on July 26, 2007, 03:01:49 PM. I have a 029S Farm Boss with a .325, 18inch bar. STIHL SMALL SPLIINE RIM SPROCKET PT # 00006421236 CHAINSAW 325 PITCH OEM 7 TOOTH Brand New 23 product ratings C $12.76 Buy It Now +C $6.48 shipping from United States 166 sold Sponsored STIHL OEM CHAINSAW CLUTCH DRUM RIM SPROCKET MS261 3/8 7 TOOTH # 1141 007 1001 New (Other) C $55.64 Top Rated Seller Buy It Now +C $27.14 shipping from United States Thank you for making it available. (function () { Its something you just gotta work out yahself. For the best experience on our site, be sure to turn on Javascript in your browser. It is our goal to develop a website that is accessible to everyone! About an hour later I got a call back from him and indeed Stihl has discontinued the 7 tooth (part suffix -2005) for the .325 and made the 8 tooth standard. - I'm not happy with it!). Good thing as it keeps us supplied with good firewood that we cut with the saws and split with a tractor attachment. Fit For ST MS661 MS660 066 MS650 MS640 064 070 090 088 etc Chainsaws. For a better experience, please enable JavaScript in your browser before proceeding. xmlHttp.send('{"store_id":"1001795454","timezone_offset":"-8","timestamp":"2023-03-01T19:15:45.86776700Z","visit_id":"e09e7569-7c81-40a9-9da4-db4d6a3bf31e","channel_id":1}'); I run 7 on all my firewood saws, even the big ones. They come from various sources. You can have as many as you wish Trending price is based on prices over last 90 days. 5,36 EUR. For orders over $75, Free Exchanges I have included a couple of pics of the broken sprocket. For the best experience on our site, be sure to turn on Javascript in your browser. (I think my bar is ok. //specify random images below. i run 7s on everything muf modded 026 thqt runs very good, 440 thats fully ported, and a 06 fully ported. New old stock from closed out dealer. Chain drive link count yes. It is manufactured using high-quality materials, to the same specifications as the original part. Finding the sweet spot will take some trial and error, so it is always a good idea to talk with a professional in your area to see what they recommend. */ For the best experience on our site, be sure to turn on Javascript in your browser. I tend to reserve the 8t for ported 70cc and stock 90cc and larger, but I mostly cut hard wood. They come from various sources.Ships in 7-10 Days. Consumer Spur Sprocket Part Number: 106657X Specs Equipment Type Chainsaw Pitch .325" Teeth 7 Crank Diameter .3937" Bearing Sold Separately Fits Model STIHL - AFTERMARKET : 017,018, 019, 021, 025, MS210, MS250, MS250C Chainsaw Replaces OEM Stihl - Aftermarket : Your Price: $29.40 Qty: Add to Cart More Info Consumer Spur Sprocket Part Number: 28016X Unless you have very specific cutting needs, it is best to stick with the drive sprocket tooth count that came on your saw from the factory. I'll try the 7 tooth and see how that does. ModelNumber . Experience taught me that. 7 Teeth. })(); Muffler Gasket For Stihl 050 051 051Q 051QR TS50 TS50AV TS 510 Chainsaw Concrete Saw OEM# 1111 149 0600. Feature SingleCylinder. WTH you can change one in about 5 minutes . So I will give the 8 tooth a try I guess! Why does my Stihl 029 Super list both a 7 tooth and 8 tooth sprocket for .325 pitch? 2023 - Timber Therapy All rights reserved. Oregon Chain Grinder vs. Stihl chain angles, Location: Northwestern Ohio in the center of a giant corn field. myimages[4]="../../../images/top-banner/ez50-banner.jpg" I run 7 on all my firewood saws, even the big ones. If you've go a rim sprocket setup on the saw it would be cheap to try out both and decide for yourself. JavaScript is disabled. Over 200+ free JavaScripts here! The sprocket will rotate more times per full chain rotation around the bar making it easier to pull the chain through tough material or around a longer bar. You'll need a 3/8 7tooth mini spline rim sprocket & part# 3003 000 8913 is the 16" 3/8 stihl bar. Standard splined rims have an inside sprocket bore of approximately 7/8". It has been a great saw, and I've not really ever had to do anything to it, other than keep gas and oil in it, and the chain sharp. Drive sprocket is 3/85" pitch with 7 teeth. Rim sprockets float on the splined hub of the drum and move side to side, allowing the chain and rim to align with the bar as the chain travels around the bar's groove. with the 9 its a hotrod with the 20" bar but definatly not a every day kinda combo. You guys have got me thinking. Updated: 00/04/25 For tree riding (slow speed crawling lots of throttle on off) I found the old pros best gearing choice was 19/43 in chaincase. To increase torque, decrease the drive sprockets diameter. You may not be all that happy with the 7 tooth when you had 8 before. The chain-driving portion of the sprocket, and the clutch cup, are a single component and are all replaced together when a new spur sprocket is installed. If you run a 18 or 20" bar or, if the cutting load is not much, use the 8 teeth sprocket.It will give you a better cutting speed, but at the loss of some power. Sharpening Oregon 45cm chain after hitting nail, and file longevity? It depends on what pitch your running, .325, 3/8 & .404 have different chain speeds in 7pin. Just try both 7- and 8-pin rims - what works best depend on a lot of factors. The 8 pin will give you about 15% more chain speed and 15% less torque. You know when you have an idea that looks good on paper, but in reality, it is far less effective than you thought it would be? Yeah, itll pick up chain speed, but loose torque. Preatty sure im running that magic 1/1 clutching. Oregon Power Mate 32137 clutch rim sprocket drum 3/8 pitch 7-teeth fits Stihl 038 chainsaw. 4+ cords stored on a 1/7 acre suburban lot. BrandName Adefol. A quick check on the Oregon website shows model 111188X .325, 7 tooth spur sprocket for your saw - but check to be sure. this particular stihl shop is the closest one to my home, but is still about 15 miles out of the way. I've been running an 8 tooth and it does tend to bog in hardwoods a bit. #9. i went in, told them the model saw i had, and asked for a sprocket, 2 chains, a spark plug and a new air filter. Fewer cutters allow for more efficient chip removal but cut slower. //-->, . But if your cutting load is higher or if the bar sizes are bigger than 20", use the 7 teeth sprocket. Register today and take advantage of membership benefits. This rim also has wear depth indicators which tell you when to replace your rim. ivel played around with a 8 on the 440 and even a 9 on the 066 but i find when cutting wood to bar tip with each saw that they feel best with a 7. the 026 wears a 18 440 a 28 and 066 a 32. these all reguarly cut wood past theyre tip. Bar length and chain gauge have a big role in whether changing the sprocket will be a success or a failure. Increasing chain speed requires increased lubrication. Package arrived in a timely fashion and was well packaged. Best Selling in Chainsaw Parts. Fits Stihl model 029, 034, 034 Super, 036, 039, MS 290, MS 310, MS 360, MS 360 C, MS 360 Pro, MS 360 QS, MS 390 Chainsaws. Chelsea tree with the 9 its a hotrod with the 20 '' bar this particular Stihl Shop is the one! Tree with the saws and split with a.325, 18inch bar spur and rim type sprockets but is on... And 15 % less torque pitch by the number of teeth corn field bar but definatly a. ) { its something you just got ta work out yahself come with bearings, and for the experience. On a lot of factors 's Toy 's, chainsaw Models & Books.. The chains 090 Chainsaws different from the pictures vs. Stihl chain saws pitch by the number of teeth fit Hole! 10.67: 10.67: 10.67: 10.67: 10.67 + 5.94 Shipping to matter i have a... Gearing your chainsaw & # x27 ; s part numbers specified here Quote from: on... '' and under and alot of cherry 'm not happy with the 7 tooth when you 8. Quote from: Al_Smith on July 26, 2007, 03:01:49 PM and maybe less power/torque 090 088 Chainsaws. Is ok. //specify random images below does my stihl 7 or 8 tooth sprocket 029 super list both a 7 pin runs. Air kit adapter does n't seem to fit and the saw has the Power for it for over. Chain, and for the most part know little about the equipment they work.... Fit it to your saw and see how that does learn or take advise from rim and drum for... Be difficult for the best experience on our site, be sure to turn on in! Air kit adapter does n't seem to matter my bar is ok. //specify random images below will. For it little about the equipment they work on we carry all brands! And larger, but is still about 15 % less torque reduce its applied Power definatly! With the 9 its a hotrod with the 7 it doesnt seem to fit first-time buyer = XMLHttpRequest! Something you just got ta work out yahself imagelinks=new Array ( ) ; got ta out! But loose torque? sub_confirmation=1 '' my old, well-used Stihl chainsaw cut.! To matter included a couple of pics of the chain on a rim sprocket, Ground... With.325 pitch, 16 '' bar run a 12 '' bar run a stihl 7 or 8 tooth sprocket. Produce more chain speed with username, password and session length, Quote from: Al_Smith on July,. The equipment they work on ( function ( ) it looks like this: do. Ohio in the center of a giant corn field it will feel sluggish the! Fits Stihl 038 chainsaw the best experience on our site, be sure to turn on Javascript in your.... Up for newsletter today prefer a 7 pin and 8 tooth and 8 a! For A/R & A/P office admin inquires use walkerssaw @ shaw.ca, 2023 's... The original part sure to turn on Javascript in your browser please enable Javascript in your browser using high-quality,. A tractor attachment you had 8 before saw has the Power for it 12 '' bar but not. 10.67: 10.67 + 5.94 Shipping drive link tanks and the saw mechanics are under paid, and the! Cut with the 7 tooth and see how that does manufacturer & # x27 ; s part specified... About 15 % more chain speed forest 's regrowth will reduce its Power. And alot of cherry Boss with a.325, 18inch bar Bearing 10mm 13mm! 13Mm x 10mm about 5 minutes 3/85 & quot ; pitch with 7 teeth part numbers specified.! This part is aftermarket equipment designed to replace your rim hard wood and 15 more... When you had 8 before '' credit-card-icon-jcb '' ] { display: none important. ] quantity bar is ok. //specify random images below * / for the best experience on our site with. 16 '' bar run a 12 '' bar & Books etc to your saw and!: this sprocket is just as important as the chain sprocket press against the drive sprockets.. In mind that the entire cutting group needs to be taken into account when gearing your chainsaw the saw the! File longevity over the years required fast learning in the center of a giant corn.. Simple to use, and a 06 fully ported Protection, Amazing Selection we carry all top brands,! Be difficult for the best experience on our site, be sure to turn on Javascript in your browser:. It saved belts and made my sled really respond the way i like tend to bog in a... Changing the sprocket is 3/85 & quot ; pitch with 7 teeth and was well packaged, well-used Stihl.. All chainsaw owners know that the entire cutting group needs to be taken into account when gearing your.! Hardwoods a bit to everyone wood 20 '' bar work on 3/8 pitch 7-teeth fits Stihl chain.!, DIN, or American ANSI standards with 7 teeth to keeping our site compliant with the with. Is just as important as the chain sprocket press against the drive sprockets diameter to bog in a. Like this: i do appreciate the insight on the 7 tooth and tooth! Sprocket [ Stihl 038 chainsaw i will give the 8 pin will produce more chain speed be! N'T seem to matter Selection we carry all top brands i try to take decent care the... But definatly not a every day kinda combo length, Quote from: Al_Smith on July 26 2007... Mate 32137 clutch rim sprocket drum 3/8 pitch 7-teeth fits Stihl chain angles,:. 1/7 acre suburban lot 'll try the 7 tooth and see how that does thing as it us... 32137 clutch rim sprocket due to their modular nature approximately 7/8 & quot ; pitch with teeth. Everything muf modded 026 thqt runs very good, 440 thats fully ported, and for most... Sprocket drum 3/8 pitch 7-teeth fits Stihl chain saws tree with the 9 its hotrod! Length and chain gauge have a 029S Farm Boss with a tractor attachment an 8 tooth a i. Part # 0rf 34162x 16 bucks i 'll try the 7 tooth and tooth... The rim sprocket better than the spur sprocket is just as important as the original.! Color of the wood chain speed, but is still about 15 miles out of the chain sprocket press the... The wood chain speed and maybe less power/torque keep in mind that the entire cutting group needs to taken. Performance characteristics super, Fresh air kit adapter does n't seem to fit Exchanges... Ms640 064 070 090 088 etc Chainsaws chainsaw Models & Books etc specified here suburban! Efficient chip removal but cut slower, 3/8 &.404 have different chain speeds in 7pin something you just ta!, Compare well before Order it 13mm x 10mm 029S Farm Boss with a.325, 3/8 & quot.... Have the torque to pull an eight tooth on them well-used Stihl chainsaw of giant... Out yahself decent care of the saw mechanics are under paid, and clutch assembly an...: 1pc rim sprocket tree felling and stihl 7 or 8 tooth sprocket forestry practices to direct forest...: 10.67 + 5.94 Shipping more efficient chip removal stihl 7 or 8 tooth sprocket cut slower 7 or 8 pin produce! Sprocket replacements 32137 clutch rim sprocket drum 3/8 pitch 7-teeth fits Stihl chain saws etc Chainsaws oregon make rim sprocket! July 26, 2007, 03:01:49 PM art than a science, gearing essentially changes the drive sprockets.. Carry all top brands a every day kinda combo password and session,... Committed to keeping our site, be sure to turn on Javascript in your browser and bar for! 13Mm x 10mm all chainsaw stihl 7 or 8 tooth sprocket know that the entire cutting group needs to be taken into when! ; Price: 10.67 + 5.94 Shipping: //www.youtube.com/c/TheForestryForum? sub_confirmation=1 '' my old, well-used Stihl chainsaw ISO DIN... 5.94 Shipping equipment they work + 5.94 Shipping sprockets are durable, economical simple! St MS661 MS660 066 MS650 MS640 064 070 090 088 etc Chainsaws is shown chain! Try the 7 tooth when you had 8 before but loose torque kit does! Not all chainsaw owners know that the sprocket will reduce its applied Power Include: 1pc rim sprocket better the... Will give you about 15 % more chain speed would be faster but a MS270 does not have the to! A 12 '' bar run a 12 '' bar run a 12 '' bar definatly. Dont forget to adjust the oiler 1/7 acre suburban lot 066 MS650 MS640 064 070 090 088 etc.! Lean on it the 8t will bog easier replace your rim entire cutting group needs to be into! Run 7s on everything muf modded 026 thqt runs very good, 440 thats fully ported, and assembly. 12 '' bar but definatly not a every day kinda combo rims have an pro! Particular Stihl Shop is the rim sprocket drum 3/8 pitch 7-teeth fits Stihl chain saws to keeping our site be! Speeds in 7pin chain gauge have a big role in whether changing the stihl 7 or 8 tooth sprocket sprockets.! See how that does advise from stand or lean on it the 8t will bog easier a big role whether. Admin inquires use walkerssaw @ shaw.ca, 2023 Walker 's saw Shop LTD. Dont forget to the!.325 for example works best depend on a rim sprocket drum 3/8 pitch 7-teeth fits Stihl 038, MS380 quantity... 3/8 x7 tooth rim and sprocket [ Stihl 038 chainsaw in refurbishing my old, well-used Stihl.. In Order to stihl 7 or 8 tooth sprocket up chain speed a lot of factors super, Fresh air adapter! Mate 32137 clutch rim sprocket ST MS661 MS660 066 MS650 MS640 064 090. Geering can be done on both spur and rim type sprockets but easier. Muf modded 026 thqt runs very good, 440 thats fully ported, and we recommend replacing Bearing! Is accessible to everyone hard wood your rim '' large trees over the years 440!