y2kbanshee9187 Posted August 29, 2005 Report Posted August 29, 2005 I replaced the pistons last winter on the shee and did kind of a lot of riding this summer. While riding last weekend I noticed it wasnt running right. It took more kicks to start and wanted to stall all the time. Also it will not idle at all. I checked the compression after riding on sunday and it was about 60-70 on both cylinders. You could see that there was a gap inside the cylinder(the piston was not tight in there). I got the shee last fall so this is my first summer riding it. Is it normal to have to replace the pistons this often? Also there is a gap and there is practically no crosshatch on the cylinder walls and no grooves in the piston. Am I going to have to go with the next bore up and get the next size piston? it is .20 over right now. Or do I go with just the next size piston and hone them out or what? thanks Ben Quote
bobbybonilla Posted August 30, 2005 Report Posted August 30, 2005 totallly depends on how you ride what is your pre mix at? Also what pistons were you running? Quote
y2kbanshee9187 Posted August 31, 2005 Author Report Posted August 31, 2005 I am running 40:1 yamalube and Wiseco pistons Quote
wayfst Posted August 31, 2005 Report Posted August 31, 2005 wisco says to punch the cylinder something like 4 thousand over the size of the piston, so it is almost worn out before you start. I have mine bored at 2 thousand , BUT you must be careful and go through a breaking period. most of the guys I've heard or seen don't have to worry about " break in " but if you have it bored that close it will last alot longer but you can cold seize it in the first 3 minutes too. just my opinon, I could be wrong! Quote
y2kbanshee9187 Posted September 2, 2005 Author Report Posted September 2, 2005 So I guess Ill get the pistons first(one size bigger) and see how they fit and at least hone out the cylinders or if not bore them out? Quote
wayfst Posted September 2, 2005 Report Posted September 2, 2005 no dude, you don't what to shortcut this. take it to someone, not the dealership, who knows what they are doing. if you try to eyeball this you'll be amazed at the rate the money flies out of our ass. Quote
y2kbanshee9187 Posted September 2, 2005 Author Report Posted September 2, 2005 Im not tryin to shortcut anything. I will take the cylinders in to get them honed/bored out but Im gonna do the rest myself. Quote
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