Topic: Cb750F2/F3 motor identification

[mixstup]

Hey Guys

I just bought a (rough,hand painted!) black 750 motor as a spare for my 750 K8 ...the engine number plate is in a different location from my K8 motor (perpendicular to the starter motor cutout), and starts with the prefix CB750E 2724...  could it be a F2,F3 motor?

it also came with a great Lockhart cooler...score!

any clues greatly apprieciated

cheers

mick

[scondon]

I forget where the engine identification #'s are stored on this site, but pretty certain it's either a K7 or F2 motor. The F2/F3 motors have larger intake spigots where the carbs mount to the engine. Your K8 carb rubbers will be too small to mount to the engine if it's a F2/F3 motor.

If you can't find the engine # info, measure the intakes and compare to your K8 for your answer

[Flying J]

Hope its not an F2. Not the best motor to use as a back up. THey have problems.

[Gearheadgreg]

The F3 Engine ID starts with 31XXXXXX try this link it may help> http://www.hondachopper.com/engine/engine_mods/modifications.html

[754]

 any motor with the serial number there is a late motor, probably ony part of 78..