Zephyr 1100

Can anyone tell me the difference between the zephyr 1100 engine and the j model engine besides the dual plug head. Is any of this interchangable.

I wouldn't know, but, you might try posting the question in the bike related forum, I think more members will see it there;)

The Zepher used an aircooled version
of the Voyager 4 cylinder motor.A
totaly different motor from the J series.

Thanks for the help guys. I will stick with an old zed.