Thumper Racing 430 kit
Posted November 07, 2002 - 08:54 AM
Posted November 07, 2002 - 10:45 AM
I believe you can make a 400 a 420 and a 426 a 444.
There is reduced headgasket sealing area but proper assembly will yield a reliable machine.
My experience has been with the eric gore 444 kit and it uses a replated nicasil bore, BTW.
Posted November 08, 2002 - 06:02 AM
Posted November 08, 2002 - 06:34 AM
Before and after dyno runs.
The extra ten hp on top is really fun for fifth gear wheelies and 15/42 gearing...
I got 50+ dyno runs on the motor and 1400+ baja miles without a single wimper reliability wise.
I got my stuff from