got a motor, no throttle bodies, no starter....$600. the reason you put a 929 motor in a 600 is for the sleeper effect. anyone who knows hondas can tell a 929's body work from a f4i, but they cant tell the motors apart.....very sneaky

 

The 929 already weighs close to 370lbs. The weight savings (if any) would be negligible. Spend the money and just get a 929, plus the better forks, brakes, etc. It would be cheaper than trying to stuff the motor in a F4 frame......which you have to cut up to even get it in there. It would handle like shit too.

EDIT - If you want a "sleeper", just get some used F4 plastics and make them fit the 929.

 

BTW - Look at the 929 frame sometime. The swingarm attaches to the motor which is used as a stressed member and bolted to the frame. The F4 uses the conventional way of having the swingarm bolted to the frame and the motor is just hung in there. You'd have to chop the hell out of the F4 frame to get it in there at all since it is probably quite a bit wider (plus the whole swingarm attachment deal). Then you'd have to worry about the rear shock attachment since that would be totally different.

You could try to get a 900RR motor in there. Many people have done the swap with F3's which is very similar to the F4.