670/ 670ho differences?

Ride2Live said:

I believe the timing is advance due to the key slot on the crankshaft is a couple of degrees different than a regular 670 motor.

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Zachmandu said:

I've posted this a couple times before-

X/H.O. - notch cut in rear of cylinder sleeve to open up rear intake transfer, 44mm carbs (40mm on std), short intake boots, RV cover with larger openings, factory tunnel-porting, flat-top pistons, different squish on head domes, RV valve with more induction timing, larger volume pipe........

That's about it. Ignition is also different, as the X/H.O. engines use DPM

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