Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Enjoy XS650.com?Consider making a donation to help support the site. XS650.com receives a small share of sales from some links on this page, but direct donations have a much greater impact on keeping this site going.
Ok I guess i was confused with xsleo sayin 707cc was 10 over. I suppose that can be done by changing the sleeves but what it boils down to is that 78mm or 3 over is the max for stock sleeves Ill let you guys debate the cc's
The 010 on the sleeve is part of the bore diameter. The bore is 75.010 mm.
On your piston top you will find a 3 digit number, this is parts of the piston diameter. On yours it will be somewhere around 958. The actual size is 74.958.
You subtract the piston size from the bore size to get the clearance. The factory spec is .050 - .055 mm
These are the sizes when it was stock. If you tear it down and measure or have a machine shop measure your cylinders and pistons and find they exceed the clearance spec you need a rebore.
Other than the fact those numbers denote stock sizes they are meaningless.
Measure what you have to determine if new parts are needed.
If you just want to go with a bigger bore then go for it. The 707 pistons are about the biggest that fit in the stock cylinders. Any bigger and the sleeves get to thin.
Leo