Topic: Can i use a 750K2-K5 carb on a 78 750f2?

[Marco83]

Hi all,

Can i use a 750K2-K5 carb on a 78 750f2??

Thank
marco

[cafe750]

You can, but to swap carbs, you also need to swap the throttle cables out for ones off of a 75f, or 70-76k and the carb mounting rubbers for the earlier carbs.  You'll also need to slightly reroute the fuel line, and turn the petcock on the tank 45 degrees, if you have the petcock where the outlet points out the back. Otherwise the fuel line will interefere with the earlier carbs choke lever, and you wont be able to fully close the choke. If you have the petcock where the outlets are on the bottom, then you can leave it as is. You may have to rejet as well...

[cafe750]

Oh, and if you can get a hold of K6 carbs, it'll make your life easier because the idle screw was moved to the right side of the rack. On the K1 ~ K5 carbs, it is on the left, and its a pain in the butt to get to  with the F bikes petcock in the way.

[Marco83]

Oh, and if you can get a hold of K6 carbs, it'll make your life easier because the idle screw was moved to the right side of the rack. On the K1 ~ K5 carbs, it is on the left, and its a pain in the butt to get to  with the F bikes petcock in the way.

Thank for the reply. Will it be any power(HP) loss if i use K early K carb on it?

[TwoTired]

Will it be any power(HP) loss if i use K early K carb on it?

It might seam so, as the earlier carbs do not have an accelerator pump.  However, the carb throat diameter is the same.  So, no difference at WOT.

Cheers,