crf250rider Posted July 30, 2007 Report Share Posted July 30, 2007 I was thinking about doing some upgrades on my transmission and had a few questions... I want to get a shift kit and was looking at the zippy shift kit or transgo shift kit. Which one is better? What about a corvette servo? I also hear people on hear talking about them... What are they supposed to do? Lastly, a torque convertor... What are they supposed to do? Quote Link to comment Share on other sites More sharing options...
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