F2 and F3
Retired Super Moderator and Fighterer
Joined: Nov 2006
Posts: 6,146
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Just re-read the thread. It doesn't seem like there should be any issue at all unless you were doing VERY long pulls at WOT. Post #9
Yes,the motors swap.Yes an F3 can run on an F2 harness,just no TPS.
The reason for the fuel pump is the ram air on the F3.The fuel pump provides about 3-4 psi extra flow.Long pulls in 4th gear will run the carbs dry,causing the bike to shut down.Ask me how I know,found this out the hard way.
F3 petcock is a nice upgrade.
The fuel pumps rarely fail,it's the ignition-style points inside that wear out. K&L makes a replacement part for them.
F2 and F3 tanks are identical except for the paint schemes.
Hope this helps
Last edited by Conrice; Aug 28, 2014 at 04:52 PM.
Super Moderator
Joined: Aug 2006
Posts: 5,304
Likes: 512
From: South Florida, USA
im working on somthing new and i feel i have to understand the difference between the f2 fuel tank and the f3 fuel tank OR why the f3 needs a fuel pump and the f2 doesnt
by the way gravity feed feels like crap just bought a fuel pump everythings flowing smooth again but thats what got my gears going
but was the f2 motor at a steeper angle making fuel flow easier to the carbs or the tank shaped a little different
by the way gravity feed feels like crap just bought a fuel pump everythings flowing smooth again but thats what got my gears going
but was the f2 motor at a steeper angle making fuel flow easier to the carbs or the tank shaped a little different
