450r carb is in my 400ex right now...

[Buffalo400]

Hi

I put a 450r carb in my 400ex (stock, with hotcams stage 2, open box).

My jetting is not perfect but arond 8/10.....

my setup is
-48 pilot, 3,5 turn out....
-3rd notch from up
-158 main jet

the bike pull hard trough the gears.... Also, I love this choke, the bike start better than the crappy 400ex choke.....

My idle is fine.... but when i push on the throttle JUST A LITTLE but quickly (The needle is still down), the bike shut down...

What do you think? i think my pilot is too small, I'm going with a 50 pilot jet....


thanks!

[04'400ex'er]

If you are refering to the FCR carb then they are known for a problem like that. The Boyesen Quickshot is the fix for it... But I would play with the pilot first.

[Buffalo400]

Not a FRC.. a keihin 42mm carb....

[04'400ex'er]

Originally posted by Buffalo400
Not a FRC.. a keihin 42mm carb.... Then it sounds like you are on the right track with the pilot jet...

[ATC350X 85]

3.5 turns out is too much go the next size up