hey all - whats the do-ability of swapping an F3 motor (1998) into an F2 chassis? is it a direct bolt-in? ive got a line on a cheap low mile F3 motor to replace my tired racebike motor. just curious. the F3 motor comes with carbs and an airbox too.

thanks!

-T

 

If you wanna use the carbs/airbox you'll need to route the ram-air under the headlight, it has been done... The motor is a direct bolt up AFAIK.

 

awesome. i suppose my F2 carbs/airbox might work too....?

thanks hershey!

-T

 

That I don't know... the F3 has a totally different carb.

Someone that has done the swap may be able to comment on that, I don't think it would be too hard to route an intake tube to the front of the bike though.

The F3's carb has a throttle position sensor, different jetting, slightly different float needles, and coolant flows through it I believe.

 

Hi there,

when I installed the F3 carbs on my bike I also used the F3 ram-air system, actually it was one of the reasons I replaced the carbs.

To be able to install the F3 ram-air system you need to remove one of the original mounting points for the F2 air box, the one on the front of the box.

Regarding the coolant pipes that run to the F3 carbs then I just removed them and have not found any issues regarding that.

There is a throttle position sensor on the F3 carbs, I used the sensorand to be able to do that I also installed an F3 wiring harness and CDI box. If you want to install the sensor you ether need to modify the frame, no room for the sensor, or do as I did.... look at these photoswww.flickr.com/vallip impg2436

 

Is that F3 carbs/airbox on an F2 motor?

Your lower rad hose looks a little short hey?

 

Yes it's is an f3 carb and airbox on a 91 F2.

The lower radiator hose was a bit short so I bent an aluminium pipe in its place.