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ya and its turning about 2500 rpms less in the cut than it should be once under load and listen to how the motor sounds . Its producing a ton of heat because your making it lug . You go ahead and run your 8 pin, I will stay with 7 pin, I have seen guys run 9 or 10 pin gears on saws , they thought it was faster but on video it was not
My brother Dennis here ran a 7 pin on his Mac 101, he was getting times in the low 4 second range in 3 cuts with cold start included.His saw has a 34mm carb and the pipe has a inverted stinger.Look at them chips fly.(Image hidden from quote, click to view.)
But how did he finish the cuts, after the chamber hit the cant?
who built the 090, I know Marcel sent a couple 090's out that way
Yep my 395XP came from the factory with a 7 pin 3/8" rim sprocket for good reason. Work saw with a round filed chisel chain no matter what cc 7 pin is the best.Race chisel bit chain thinned out, cutter square filed half ways back, .015 lowered depth gauges you can get by with a 8 pin fine in smaller logs with a work saw.But round filed chisel chain sucks the power out of todays high revving work saws.Race saws....I once had a Stihl 090 I raced that was ported etc on a tune pipe. Madsens from the PNW saw pictures of my small logs we cut in our contests. They said you need a 11 pin sprocket on the 090, I believed them and got beat by the Mac 101's race after race. Then I found out they were running 7 and 8 pin sprockets on the Macs, I put a 7 on the 090 and was then beating them or keeping up to them. My 40 horse YZ125 bike saw I run a 11 pin sprocket. Works good for big and smaller wood.
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