Leak Jet

[mrnate400ex]

Is it worth it to go to a 55 leak on the '07 450r?? I have heard this both ways. I currently have a full DASA pipe and will soon have my Web 943/921 cam in. I notice a little hesitation when I punch it right now. It really isn't too bad though. What do you all think???

[86Rryder]

I say do it! It works out great with my setup...

[beany]

Kinda along the same line. What exactly does the leak jet control??

[mrnate400ex]

i'm not completly for sure, but i think it is the jet that controls the amount of fuel coming from the accelerator pump. not completly for sure on that one though. somebody correct me if i'm wrong!!

[450R_lover]

it does something along those lines... something to do with the accelerator pump. I just know that the smaller the number the more fuel that is being moved. I know that when i did the fcr mod to my 04' it had a stock 55 in it, and i changed it to a 42 and WOW! it made it way better.

[adinocr7]

I had the same problem with my 06'. But it didn't just hesitate . . . it would literally stall everytime I whacked the throttle. I installed a #55 leak jet and it cured this problem for good. I know some guys are running a #50 as well and they have had very good luck. So spend the extra $4 bucks and get a #50 just to be safe.

[mrnate400ex]

^^^^^^^^^^
what main are you running, and what clip on your needle?? i put in a 162 main and run on the 4th clip down. i think it is way to rich on the needle and that could be part of my problem on the hesitation. i may change it tomorrow and see if that helps.

[TarheelRedRider]

I seem to be having a problem with mine stalling only on up hill jumps or a jump that might throw me a bit side ways. Its like soon as I land and get back on the gas it will stall out like I ran out of gas. Do you guys think changing the leak jet could solve this. I really dont understand it but It runs great on any flat path but hit a up hill jump and it will cut out.

[Johnson]

if you have a 06 or 07 you don't know what you are missing if you haven't changed your leak jet also a quick shot will help even more.

[Lonestar_R]

I have a 42 leak jet in mine and that got rid of all the hesitation. a 70 is stock

[GPracer2500]

Originally posted by TarheelRedRider
I seem to be having a problem with mine stalling only on up hill jumps or a jump that might throw me a bit side ways. Its like soon as I land and get back on the gas it will stall out like I ran out of gas. Do you guys think changing the leak jet could solve this. I really dont understand it but It runs great on any flat path but hit a up hill jump and it will cut out.

Could be a float height issue. Make sure it's set to spec.

[TarheelRedRider]

Thanks I will check that out.