I too have a Modena sport. Mines the steel frame with the standard size 26" wheels & tires. I want to install a 4 stroke engine kit on it. It has a one crank. Do I have to change my crank to a 3 ?
Thank you.
yes you will have to switch to 3 piece crank. some kits come with the parts , other kits you need to get the bottom bracket parts separately, like at Kings motorbikes dot com.
+1 on the pics Boxkite: Try one of these from Phantom bikes . Cromoly and un-bendable, you'll need crank arms of course but some have the laying around. If you post a WTB in the classifieds might get em cheap.