Well its that time to buy a new engine for my f4i. There's f4 engines everywhere locally around me so my question is, can i put the throttle bodies and harness off my motor onto the f4 and it run right with the fi?

 

thats what ive heard, but ive also heard the head is different
what exactly is wrong with yours?

 

Well actually it runs like a dream, its just the crank and the flywheel are bent and there's a hole in the upper case.

 

if your head is good, put your head on the f4 engine and you shouldnt have problems

 

that sounds like a plan. In the process i'll gain a new headgasket

 

true, i think the heads might be the same tho, i havent seen where they arent. ill check bike bandit real quick and i can call my dealer tomorrow

 

Okay Thanks!

 

The heads are different as is the timing. I can tell you this for sure as I had both bikes side by side and worked on them the same time. got 2 f4 motors in the shop and vangill's old f4i motor to go with my f4i. The f4i has a cam pulse sensor needed for the FI that the F4 doesnt have. Cams are different. I dont know if the cranks are different or not. the timing difference may be in the cams and if thats the case then the f4i head would bolt on the f4 and it would work fine. The gearing in the tranny is also slightly different which you can verify by the 2 different service manuals. its only a slight difference though and wouldnt be that noticible.

 

jonld said it better^

 

Just checked bike bandit. The part #s are definately not the same.