Quote:
Originally Posted by
Kev
Been there done that, any engine performance modification will affect the long term reliability of a motor. The cylinder is to thin at 104mm & you may brake the cylinder skirt off with a 104mm.
Bore the casing & go as big as you want right up to 108mm.
A 105.5 bore with +2mm valves, 5050 cam stage 3 air filter will see around 76 rear wheel HP.
You can never compare the XT to a 690 KTM they are two different bikes, I am yet to see an XT anywhere the same weight of the KTM, we know we have the capability's of getting these motors up 125 rear HP as done on the 700 Raptors .
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Well that it would affect long term reliability i fully understand. But my question would be more if i do those mods will i have to do a full rebuild every 10h or would i still be able to go for longer runs as the XT was built for.
Hum okey i guess im better off just buying a 690 then..