TWO NEW DRUMS FOR STIHL 090 CHAINSAWS. document.write('') 10% OFF. I usually don't cut much bigger than 12" with this saw. I run an 8t on the 056 all the time. Thanks for the replies. All rights reserved. $25.35 $8.79 $15.99 Page 1 of 1 Start over Ask for details. A pitch eight tooth sprocket has a very similar diameter to a .404 pitch 7 tooth sprocket. The teeth of the chain sprocket press against the drive link tanks and the saw chain starts to rotate. You may not be all that happy with the 7 tooth when you had 8 before. So I will give the 8 tooth a try I guess! Running it harder or longer wont fix the problem. 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}'); Spline Type Tooth Count - Chain Pitch Standard 6 8 Tooth - .404" Small 7 7 Tooth - .325", 7 Tooth - 3/8", 8 Tooth - .325" Standard 7 7 Tooth - 3/8", 7 Tooth - .404", 8 Tooth - 3/8", 8 Tooth - .404", 9 Tooth - .325" Oregon Power Mate Replaceable Rims Radial Ports See the back for an explanation of these Oregon symbols . JavaScript is disabled. Attention Please: This Sprocket Fit Inner Hole 19MM, Compare Well Before Order It. Not all chainsaw owners know that the sprocket is just as important as the chain on a chainsaw. JavaScript is disabled. Spur chain sprockets are durable, economical, simple to use, and very popular. Quantity-+ Sounds like a mistake.?? I run 7 on all my firewood saws, even the big ones. It cost less to replace just the rim. But my big saws Stihl 044 and 660 I can't see a problem with an 8. Fewer cutters allow for more efficient chip removal but cut slower. })(); i run 7s on everything muf modded 026 thqt runs very good, 440 thats fully ported, and a 06 fully ported. I have an 026 pro with .325 pitch, 16" bar. The increased speed of the 8 tooth sprocket effectively made up the difference. For a better experience, please enable JavaScript in your browser before proceeding. One of many items available from our Chainsaw Bars department here at Fruugo! As far as I know the MS290 in .325 comes with a 8 tooth nowadays and they seem fine with it. Preatty sure im running that magic 1/1 clutching. Bailey's is NOT an authorized STIHL Dealer.OEM parts are new. Cylinder Assemblies 152. //-->,