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Mmmmm, not necessarily. Now I haven't ridden a new 360 Motor to compare, but to me, it would be much easier to balance out the 360 Motor than the 270 Motor, since I would think primary and secondary vibration would be MUCH more complex than an engine with both Pistons moving in parallel. I would think balancing a 360 would require a larger counterbalance...



Hi guys - not strictly true - the 270 degree motor has much better primary balance - see the explanation below - basically, its to do with the forces generated when the pistons reaching the end of their throw not reinforcing each other as they do in the 360 degree motor. Lotsa guys in Australia have done this mod to the Yammy XS650 which has a 360 degree crank - it is splined and can be dismantled and rebuilt as a 270. Needs new cams, of course and ignition mods, but is apparently worth the hassle. This was originally done to a Meriden Triumph motor by Phil Irving.

Have fun

Jan

270 degree timing explanation

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