best big bore kit for XR80 ?????
Posted May 25, 2004 - 03:09 PM
Posted May 25, 2004 - 03:53 PM
I have a Powroll 120cc kit in my XR100 and it very good kit.
Posted May 25, 2004 - 10:12 PM
But after that a Powroll kit is a very good idea or if you can find on a CB350 4 piston (any O/S) will do nicely in a XR80. XR75's are a bit different depending on the year. TheXR95's rev very well and make good power and you have a better gearbox as the 80 is close ratio compared to the 100.
Posted May 26, 2004 - 06:26 AM
Posted May 26, 2004 - 09:33 AM
Would 2 base gaskets lower the compression enough?
Posted May 26, 2004 - 10:45 AM
Posted May 26, 2004 - 02:46 PM
On the KLX piston the pin to crown height is a lot higher than the XR80. From memory its over 4 mm difference so it would be best to heavily mill the piston for height and valve pockets or add an appropriate spacer under the barrel. We studied it and decided that the 98cc piston was a lot easier in a XR80. KLX piston is good match for a XR75 motors though.
Posted May 26, 2004 - 04:18 PM
Posted May 26, 2004 - 07:30 PM