Recent content by Percyboy

Correct, Triumph are using 270 degree engines in the Speedmaster, America, Scrambler, and the Thunderbird. They are staying with 360 tradition with the Bonneville, and Thruxton. So, they get 2 engines out of 1. Yamaha started using a 270 degree crank in the 90's with the TRX 850, and now...

I've just been doing some research on the new Norton Commando 961 Check this out: http://www.motorcyclistonline.com/features/122_0501_norton_motorsports_952_commando/photo_08.html Looks like those Norton Engineers have been reading this site. Norton have chosen to go with a 270 degree...

Rephasing is a way of converting your parallel twin into a V twin by getting it to fire like one. XS650's can be easily modified by pulling the crank apart and effectively moving the crank pins. You also have to change the cam and the timing. Because XS650's have 13 crankshaft splines, you...

Thanks Hugh for posting "Riding the Rephased XS650" on YouTube. It is good be able to hear a rephased bike under load riding up the road. I became interested in 270 degree parallel twins a while back when the TRX850 was released here in Australia. I then started thinking about my old xs650...