VN1700 pistons to raise 1600 comp ratio

[andyvh1959]

Another wild ass idea: VN1600 bore and stroke is 102mm x 95mm. VN1700 bore and stroke is 102mm x 104mm. The VN1700 comp ratio is 9.5:1 versus 9.0:1 for the VN1600. If the deck height of the 1700 piston allows for valve clearance in the 1600 at TDC then it may raise the comp-ratio. So, if the wrist pin diameter for both VN1600 and VN1700 pistons are the same, then perhaps the 1700 piston could fit if the pin to deck height does not cause valve interference. On Bikebandit the wrist pin part numbers for the 1600 and 1700 are different, but that doesn't mean the pin diameters are different.

Given the bores are the same, the 1700 engine increased displacement is in the con-rod length and crank throw (the 104mm stroke), 9mm longer for the VN1700. I assume the crank offset is also longer for the VN1700. Anyone know the crank offset and con-rod center to center distance for the 1700, and how those dimensions compare to the VN1600?

Some interesting reading here: https://www.motortrend.com/how-to/05...-stroke-ratio/
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