c00t3r Posted November 7, 2004 Report Posted November 7, 2004 okay, i have a weird problem and i have an idea what it might be, but i'm wondering if anyone else has ever had this problem... i have a 99, with pc pipes, reed spacers, bored carbs +2mm, prolites, reeds, k&n clamp-ons, no airbox, jets are 340 mains... and the plugs are perfect color... it rips untill you do about the 3rd wot run and then the left cylinder runs ouf of gas, like the damn carb is dry, if you let it idle for about 20 seconds the cylinder comes back on and it runs great for another few minutes.. is it possible that the fuel petcock on the tank does not flow enough fuel to supply the motor? i was wondering if anyone had ever had this kind of problem before.. any input is apppeciated. c00t3r Quote
Thats Right Posted November 7, 2004 Report Posted November 7, 2004 I had a similiar problem with my 04, It would only run on one cylinder from closed to about half throttle, and from half up it was good. At first I thought it was a bad plug. But after sticking in a couple new ones it didn't change. After thinking about it I took the left side carb off and there was a tiny piece of dirt that was clogging the pilot jet. I cleaned it out and presto it was fixed. I think with yours it could be a piece of dirt floating around in your float bowl, and when you hold it wide open it tries to suck that piece of dirt through the main jet and it starves for fuel, and then when you let it sit and idle the dirt floates back to the bottom and it seems fine again. not sure tho, but I would check there first. Quote
c00t3r Posted November 7, 2004 Author Report Posted November 7, 2004 did that earlier, took carbs apart, fuel lines, took the tank off and the petcock off, cleaned EVERYTHING! and it still does it. c00t3r Quote
JKJK Posted November 7, 2004 Report Posted November 7, 2004 did you check the float level on the left side?if it's to low it could be doing just what your saying. Quote
Thats Right Posted November 7, 2004 Report Posted November 7, 2004 I wonder if it could be a coil thats getting fuct I've heard of that happening before. Sometimes when a coil gets hot it just shuts off then when it cools down it starts to work again I'm not sure what else to suggest man sorry Quote
banshee04le Posted November 7, 2004 Report Posted November 7, 2004 Check the torque on your head and cylinder nuts. Quote
c00t3r Posted November 7, 2004 Author Report Posted November 7, 2004 float levels are exactly the same and set to factory specs... as for the coil, it would shut off both cylinders... right? unless it was the wire itself... and the head is torqued right.. c00t3r Quote
sredish Posted November 7, 2004 Report Posted November 7, 2004 Ok, it's possible that the fuel supply line for that one carb is pinched or crimped or the bent line for the float is pinched and when it starts craving more fuel it won't flow fast enough on the one side. Something easy to look for, but often overlooked. Quote
dynabanshee Posted November 7, 2004 Report Posted November 7, 2004 If you are certain the left carb is fine, it very could well be you have something in your fuel petcock. You could have some debris blocking fuel flow. I would take a look at that. Although it would be weird for it to completely die, while the right side is running fine, it may be the case. On my bike when you run it with the fuel off, the left dies first, probably because the right has a longer fuel line with more fuel in it. Does the left side sound lean before it dies, like when it is reving high before it runs out of fuel? Quote
RNBRAD Posted November 8, 2004 Report Posted November 8, 2004 Had the same problem with the left cylinder, come to find out the carbs were out of sync and so very slightly. Left slide was delayed a few MM's. Quote
FIRST BANSHEE Posted November 8, 2004 Report Posted November 8, 2004 My friend had this problem onthe left side last time we rode. After cleaning the carbs he still had the same problem. The left carb ended up having some gunk in the fuel tube that would block the float needle. we found that when we sprayed out all the passages the second time. Quote
c00t3r Posted November 8, 2004 Author Report Posted November 8, 2004 carbs are perfectly sync'ed, and i took the petcock apart wheen i was cleaning everyting else... all the seals are in great shape, there is nothing in the passages... and the fuel lines are all straight and no, crimps/melts... etc... when it does it.. it sputters about five times and then shuts off completely, untill you coast or take it real easy for a few seconds... then it slowly starts to pop again and then runs great...you let it idle for 30 seconds... turn around and do another wot run through 6th and it runs fine... shut it down, turn around and at about half way through third, spinning on wet pavement it starts to die again... it does this every time, consistently.... c00t3r Quote
JKJK Posted November 8, 2004 Report Posted November 8, 2004 try switching the plug wires+run it.if it reacts the same you can eiminate the plug cap+coil theory.is the compression the same in both jugs? are the plugs gapped the same? Quote
bone450 Posted November 8, 2004 Report Posted November 8, 2004 I had the same problem. The left cylinder would just cut out and then turn back on. Let me tell you it really sucks when leading a race while going off a jump. My problem was electrical. The 4 pin connector off the stator had some bad connections, and would hold water. Which makes sense because it would run bad real bad when it would get wet. Cut it off and put 4 butt connectors on and it works great now. So I think you have an electrical problem because mine was excatlly the same, only the left cylinder wouldn't run sometimes, the right one would always fire. I suggest checking all connections and replace if necessary. After that check the other electrical components. Quote
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