440 Thumper Kit .vs. 470 Thumper Kit

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12-29-2002, 01:46 PM

llknowlesll

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440 Thumper Kit .vs. 470 Thumper Kit

I was looking to boring my quad out. Thumper makes a 440 big bore kit and a 470 big bore kit. Which one should I go with? Is the 470 kit as reliable as the 440? Have you heard anything about either one?

llknowlesll

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12-30-2002, 11:49 AM

LT250RSuperstar

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440 Thumper Kit .vs. 470 Thumper Kit

I know you want power but what is your purpose for it? Are you planning to race it in the open class or 440 under?

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