Originally Posted by Stromdog
I think it would make a pretty decent dual sport motor and wouldn't have any trouble running at superslab speeds either. Might be a little heavy, but look at the lbs. on that new 650 KLR!
Even with the heavier engine, I don't think it'd even be close. The magazines put he new KLR at 37HP 32 Ft llbs of torque.
From the web..
Model Yamaha XS 650 F 1979
Power 54.8 hp (408.6 kW) @ 7000 rpm, Torque 58 Nm (42.8 ft. lbs) @ 5500 rpm
And that's box stock which it wouldn't be when I got through with it..
Damm it would be a fun bike to build...