starts and idles fine give it gas it dies

[tweake]

hi everyone

i need help i have a 2003 drz400s it idles fine starts ezay but if u rev it it will rev fine 1 time then the 2 time u rev it it cuts out and dies like its getting no fuel but i striped carb soaked it for days. and its doing the same thing no change . the bike only has 4000miles .and was stored for years before i got it . carb is getting fuel . i set float level did every thing i can think of. pleas help

[ptgarcia]

Vacuum line to the fuel cock connected?

[tweake]

Vacuum line to the fuel cock connected?

yes i even tryed runng off a fuel bottol vac line caped off.

1 thing is it starts no ckoke. if u put choke on it dies out

[ptgarcia]

yes i even tryed runng off a fuel bottol vac line caped off.

1 thing is it starts no ckoke. if u put choke on it dies out

What jetting is in the carb?

[tweake]

its all stock . i got the bike not running. i didnt check the jet size.

thanks 4 the fast replys and the help!!!

[bikeslut]

new main jet, IF you can't get that one clean

[tweake]

its clean . and its a 142 main .

i dont get this. the carb has got to be clean.

[ptgarcia]

It would be helpful to know what jets and needle (with clip position) are in the carb. Often cleaning jets doesn't work so a new main jet is a good idea.

Does the bike have any mods to the exhaust or intake? Any engine mods?

[tweake]

no mods bikes bone stock .

[ptgarcia]

Even though you cleaned it, I'm guessing the main jet is still clogged. Buy a new main (only a few dollars) and try again.

[Vehicle 1]

Try speeding up the idle, something similar happened to me and that was the solution. Just enough for it to not die, if it needs to be to high I don't know...

[shift1313]

whats your pilot fuel screw set at? Its odd that it dies with the choke. What was the story behind the bike. why was it parked?

If its bone stock and the jetting was never messed with the pilot fuel screw(bottom of the carb towards engine) will have a brass plug in it that needs to be removed. It still wouldnt make sense that the choke is killing it though.

[rawsm]

stock mikuni carb? did you take the top off the carb? if so, did you get the spring in straight? the one that holds the slide down. vaccum pulls it up as rpm's rise. if the slide is stuck, it will idle fine till you give it gas than it dies (leans out).

[tweake]

no clue y it was parked .

air fuel screw is set at 2 1/2 .i removed the plug to get to it to strip the carb to clean it . and the slide is free no holes in the diaphragm.

it will not start on choke.and as sone as its pulled it dies rite out .

i have done more then my fair share of carbs in my day but i just dont get this bike

thank you all hope we can get to the bottom of this

[PBMW]

If the choke kills it, I'm guessing it's rich. It starts without the choke nad not with...Look at the seal aroudn the choke shaft.

look at the pilot jet.

I'm not sure, is there a plug in the hole where the pilot jet goes so it gets fuel from the main and not from the float bowl dirrectly? if so it could be leaking.

[Damon259]

If it has slide carbs, check the slide to see if there is any chip out of it where extra gas runns in when its idling. I doubt its it but its a possibilty.

[tweake]

fix it woooohooooo.

turns out i figure that the bike had a pipe on it or something .toke the carb out to look at jet size it had a 162 not a 142 .put a 142 in she runs just fine now. dam eyes r getting old on me.

thank u all !!!!!!

[Vehicle 1]

cool!