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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
rebuilding my YZ 125 and a quick question
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[QUOTE="TimberPig, post: 1034256, member: 66421"] About 125.9cc. Stock is 124.9cc You do realize that boring it by that amount will do little more than remove the plating that forms the wear surface of the cylinder, that the piston and rings slide upon. The gains will be minimal at best, and the cost will be very high, as you would have to replate the cylinder so that it will last. If you want an overbore, then get it done right so you actually see some gains for the money. Otherwise, freshen up the crosshatch with a scotchbrite and throw some fresh rings in (and piston if needed) and leave it at the stock bore diameter. Your wallet will thank you , as this is your cheapest option. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
rebuilding my YZ 125 and a quick question
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