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Old 11-27-2011, 07:05 AM   #10
anotherguy
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Joined: Jun 2009
Location: the hills
Oddometer: 5,936
Two stroke cylinders are hard on boring tools. The interrupted cut beats the hell outta carbide. That's why I prefer to hone .010"/.025MM. If it needs more than that boring is OK but I'd rather not. Modern stones can take a lot of material out fast. Sometimes with cast in liners boring is needed to square the bore up. Yamaha is particularly bad with that.
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