yz400e Jetting

[jake57]

now i can start the f&^%$#@g thing i have a problem with the jetting.
it has standard jetting
38mm Mikuni
main 370
Needle jet Q-0
pilot 60
needle 6f-16
standard pipe
DG silencer
i had this problem before i changed electrics
once started it will idle , it will not rev , turn the fuel off when it starts to run out it revs ok
thanks jake

[motomaniac]

check the float level.

[oldyzman]

Yep like moto said, Check your float level, or check the needle for excessive wear...

[ARN]

if float level is ok as it isn't running out of over flows ,they are miles to rich standard ,try 50 pilot I am running 45 and 3 plus slide (you can file yours) try that

[TT5 Matt]

also check/replace the needle jet coz they DO wear out

[jake57]

thanks
new carbi , jets &needle
float level ok
3 slide
tried 45 pilot still the same

[firko]

Don't tell me it's still giving you shit Jake? Has Phippsy had a look at it?

[TT5 Matt]

ok the jetting you have stated is it std yz400e jetting or what came with a 38mm off the shelf carb?
know anyone with a good running 400d/e?maybe borrow their carb to see if it cleans up your carb problems then copy it if it works

[jake57]

matt it is standard yz jetting
firko yes it is still playing up,no phippsy has not looked at it
 

[ARN]

local bike shop had a yz250d which wouldn't rev out they rebuilt it and still had problem ,he lent a set of electrics of mine still no good ended up being a blocked exhaust or muffler.

[John Orchard]

How old is the needle jet?  Had the same problem with my KX, it was a worn needle jet.

[motomaniac]

if you have the old carb try that.the new carbs are different and you will need to play around with the jetting ie original jetting spec wont necessarily work in a new mikuni.

[jake57]

ARN  i will check pipe & muffler
John  needle jet is new
moto had same problem with old carby
thanks for your nelp so far.  have work commitments this week will try again on the weekend