I am running a hondar f3 motor the minisprint car that I bought to race this season. Can someone tell me if there is any difference between the heads on a 95-96 and the 97-99 f3 motors? I know there were some changes on the bikes but not sure about the motors.. Thank you!

 

As far as I know the only changes from 95/96 to 97/98 are the seat and rear plastics the rest of the bike is the same. The engine should be the exact same

 

the engine has at the least a different cam or different cdi box, maybe even different timing, they upped it by five horse in 97

 

1997/98 models have Ram Air induction. I'm not certain about the exact mechanics of the system; but that is the major difference between the 95/96 and the 97/98 as far as I know.

 

nope, that's the difference between f2 and f3, my 96 has ram air.

 

That makes sense that it would be the difference between models and not model years. Learn something new every day here on the forum. Thanks.

 

From what I can tell the 97 just uses a different spring setup with less parts and longer uncompressed spring length, but I would be careful interchanging parts on one head to another.

 

Thank you guys. Does anyone know in which pattern to tighted the head bolts?

 

Manual says:
"Install and tighten the cylinder head bolts in a crisscross pattern in 2-3 steps"

Usually, if there is not a sequence given, then you'd start from the inner most bolts working outward in succession. Spec is 35 lb-ft. for head bolts.