Ok guys I hate to be that guy that post the same forum but
I've read a bunch and I'm still having trouble

Problem:
I bought a 01 f4i to stunt it's my first bike with a full set up
The guy I bought it from said it need new injectors and fuel and engine
Cut relays I bought all that replaced it bike cranks no fuel prime (with relays)
But when I jump them fuel pump primes bike cranks but won't start
I bypassed bas sensor checked fuses checked kill switch all good
I was checking connectors and I found one under the fuel tank three wires pink green and black I think can't remember now but it lead straight down to a connector going in to the engine idk what that is could that cause it to not start?

Would love some input from someone more experienced so I can finally ride
Thanks guys!

 

sound like the tilt sensor or kill switch prob

 

Its more than likley your tip over senor. Just search for f4i ttip over sensor bypass. I have no mechanical experience or know how and I was able to do it. It is in the upper fairing right by the headlight. The kill switches on f4i's are know to go bad as well. but my best guess is the tip over sensor. I have an 01 f4i that had the same problem- bugged the **** out of me for weeks and I did the mod and it worked just fine.

 

The tip sensor is bypassed and I took the kill switch apart and it looked fine
So Idk where the problem is I'm stumped

 

Just caz the kill switch looks good dose not mean it is I had that with my fri and it was the kill switch I would try to jump it just to make sure it's good

 

I'd like to just buy a new harness already stunt ready just bolt on and go I hate screwing with electrical crap

 

So I jumped it no change still cranks no fire I'm lost

 

Did it ever run, from when you bought it to now??

Could be the Ign. Pink wire broke (or not hooked up)... Or it could be the ECM...

 

I didn't run I picked it up for a grand the guy said it just need fuel relay and the kill relay I got them and not change cranks just fine I jumped the relays got the fuel pump to prime cranks nothing replaced injectors same thang no life bypassed the kill switch when I touch the yellow and black wire it will crank but I noticed the bas was jumped witch it cranked took that harness off still cranked but plugged the harness back in bc I redid the bas thought maybe it wasn't getting a good connection wouldn't crank took it back off cranked again electrical is not my thing it wears me out idk what to do

 

I hear the Diode for the Ign. Goes on them...

you in Stillwater,MN??

 

Stillwater Oklahoma! Ok I'm doing this with out a manual so ill just have to poke aroun until I find it

 

Good Luck man... Keep us updated

 

Will do thanks for all your help!!