lost cause

Well ive been working on an 07 yzf 600r and it doesnt seem to want to idle right. It sat for around 6 months when i got it it would start only on choke and when you touched the throttle it would die pulled carbs cleaned the jets and what not, it will start with out choke now but the rpm gague will go to 8 grand the drop to 0 and wont move when i rev it up and ideas?

Back Of The Pack

I had a 97 carb YZF 600R and I had to start it if it was cold with choke on until it warmed up same thing with my GSXR if i try to rev it it dies let it warm up before u gas it. Just my

shaner

I need more clarification here. The tach goes to 8k then drops to zero, but the bike is still running? If thats the case it's obviously something electrical. Maybe a bad tach wire or bad battery. Also, not sure if that bike has an in tank fuel strainer but if it does you'll want to replace it after sitting so long. Fuel filter too. If the strainer is clogged with dirty fuel it won't be able to let enough fuel through to idle. Fuel would only get through when it was reved or the choke was on.

Matt

After careful consideration I believe I may have an answer for you.... The root cause of the problem is because it's a yamaha... My guess would be carburetor problems still, vacuum leak, fuel problems (clogged filter, old gas, etc...). That's all I got

Matt

If the carb is gunked up enough to be cleaned, chances are other fuel system components will need it too...

lost cause

i cleaned all the fuel parts pumps screens etc i dont really no were he tac wire on this thing is located. and yes the bike still runs when the tac drops to zero

whitedevil

when you first turn the key on, does the tach jump all the way up and then come down to zero, then you start the bike?

lost cause

no i start the bike it goes to 8 or 9 and then drops to zerro while bikes running push the choke off and it runs for a second then dies. we just pulled the plugs oone and two were good but 3 and 4 had alot of rust on the plug itself but not on the contact point.

whitedevil

if there was rust there but not on contacts then water was just sitting in the hole is all. Thats why most plugs have that rubber piece that go over the hole.

It sounds like a bad contact somewhere, the tach is connected to the ECU thats why it jumps up then goes back down, so it seems to be not getting the signal from engine to ECU.

lost cause

so if i pull the ecu and reconnect it could this rest things possibley?

whitedevil

Prolly not reset, but if there is a bad connection, it wouldnt hurt to try. I had a similar issue with my light, looked fine connection wise, but light would not come on, pulled cable and reconnected and everything was fine. Had a loose connection in a 12 connector.

lost cause

do you know where the ecu is located on this bike by chance

lost cause

scratch that fixed the tac but i still cant get her to run with out the choke on ive cleaned everthing good with carb cleaner all the fuel parts the jets etc and still cant get her to idle

whitedevil

So what was with the Tach?

Do you get any codes? Leave the kickstand down, in neutral, turn the bike on, any flashing lights?

whitedevil

As for idling, you get it to start with the choke and continue to run, is it jetted properly for our elevation? With a choke, you should be able to slow put that in till it idles after it warms up, which don't take long. Check to make sure you dont have a pinched hose or anything under the fuel tank if you have moved that stuff around.

lost cause

i dont get any codes on it the tac was a lose connection. as far as jets there all stock i dont no much about that just how to clean them and put them back togather and there were no pinched lines but after movein stuff aaround lines and what not its starting to get a lil betterr

whitedevil

Moving it around? I would check to make sure you dont have something inside the tank, debris or something could clog it.

Matt

It's probably the muffler bearings... DANGIT! Why can't I filter this! Ok, i'm gonna get my post whoring self back to work now...

lost cause

well heres the word f*&k your muffler bearings. any how now it will idle with out choke but once i rev it up it sticks at whatever i rev it to then slowly drops tell it dies

whitedevil

LMAO @ muffler bearings, hows the blinker fluid? sorry lol.

it slowly comes down from rev, even if you force the throttle back to position?

whitedevil

come to think of it, get rid of that yammy, get back on the Honda and be done! LMAO.

Matt

I was just havin fun, calm down man...

And it's definitely the blinker fluid. Or it might be the specs on the roto-gurter...

lost cause

yzf aint mine am still rockin the cbr's

whitedevil

Well if ya want more ideas, answer the questions, lol.

Does the rev go down with the throttle? If you rev it up and force the throttle back to position does the engine sync with the throttle or does that take forever to come down? If you let throttle go and it snaps back into position but rev is still up then you got a sticky slide to the carbs.

R1DON

have you ever set the idle on it? sounds to me that you need to bump your idle up. my r1 did the same thing when i put it back together.

Liteone

Ok my says that if You've cleaned the carbs and the filters it sounds like there is a chance that the fuel lines themselves have gon bad. not allowing enough fuel to keep teh carbs full.