Idontknowwhy Posted March 19, 2009 Report Posted March 19, 2009 Hey all new to the forum, acquired a yfz350 on a trade, bike is complete and original. 99 model, When I got it the clutch side cover was off and i was told that the clutch needed attention. Tthere was play in basket and ring gear, so i replaced the basket with another oem housing. Anywho, I'm getting no fuel to the cylinders...the bowls are full of gas, . But i kick and i kick and nothing, plugs are bone dry and carbs full of gas..but the bike will fire right up when i take the airbox off and shoot some premix in the carbs Took both carbs apart blew them out with air and didn't see any kind of obstruction of any sorts. Got a clymer manual on order been waiting on it for 2 weeks ughhh local bike shop. Anybody have any ideas on what im not seeing/overlooking?? Thanks for your time :happy: Quote
firebanshee Posted March 19, 2009 Report Posted March 19, 2009 Hey all new to the forum, acquired a yfz350 on a trade, bike is complete and original. 99 model, When I got it the clutch side cover was off and i was told that the clutch needed attention. Tthere was play in basket and ring gear, so i replaced the basket with another oem housing. Anywho, I'm getting no fuel to the cylinders...the bowls are full of gas, . But i kick and i kick and nothing, plugs are bone dry and carbs full of gas..but the bike will fire right up when i take the airbox off and shoot some premix in the carbs Took both carbs apart blew them out with air and didn't see any kind of obstruction of any sorts. Got a clymer manual on order been waiting on it for 2 weeks ughhh local bike shop. Anybody have any ideas on what im not seeing/overlooking?? Thanks for your time :happy: Do you have the balance tube hooked up that goes between the carbs ? Quote
sandunagen Posted March 19, 2009 Report Posted March 19, 2009 check and make sure reeds are good. if reeds are shot it wont run Quote
tidos76 Posted March 19, 2009 Report Posted March 19, 2009 make sure you jets aren't clogged. and you slides are in the right direction. Is the gas good? you may also need to do a compression check. Quote
Idontknowwhy Posted March 19, 2009 Author Report Posted March 19, 2009 make sure you jets aren't clogged. and you slides are in the right direction. Is the gas good? you may also need to do a compression check. Jets are clear, the slides are in the right direction, Gas is fresh, It's just not getting to the cylinders. As for compression I don't know im sure it could use a set of rings ..but it starts right up on a prime...I just don't understand why it's not getting fuel to the cylinders..I work on cars more than anything, and i really dont understand the whole reed deal, I took them out and inspected them but I'm not sure what im looking for. Any other ideas, I cleaned the carbs im gonna pop em back on today, and give her a shot. Hopefully it'll magically fix itself but i doubt it..More ideas are appreciated Quote
Idontknowwhy Posted March 19, 2009 Author Report Posted March 19, 2009 Ah fuck, lost the little valve that the float presses against, Think I had it sitting in my lap and I sprung up and now its MIA. Eh haste makes waste I suppose...Ordered a carb rebuild kit. Guess it's time to degrease the rest of the bike..The stock mikunis shined up pretty nice :cool: Quote
fastbanshee8 Posted March 19, 2009 Report Posted March 19, 2009 (edited) Make sure the screens in the gas tank aren't clogged up. You'll have to make sure it's empty, and take the valve out to check them. Also make sure the gas cap vent isn't clogged. Edited March 19, 2009 by fastbanshee8 Quote
Idontknowwhy Posted March 19, 2009 Author Report Posted March 19, 2009 Lol I got fuel out the tank, out the petcock, into both carbs, the bowls were both full on the carbs.. but the plugs were bone dry when i pulled them. So i mean it's got to be carburetor related??? Someone earlier mentioned reeds, but I mean i inspected them and the bend was in spec...and there was no cracks or anything...But like I said I'm not sure what I'm looking at either, If someone would like to elaborate on reeds I'd appreciate it Quote
sleeper06 Posted March 19, 2009 Report Posted March 19, 2009 Your pilot ciciut is clogged.you sometimes need to use some small wire,welding wire or pins,take jet out and stick shit through there,when you blow through the pilot hole you should feel the air coming out of two pinholes in the carb throat Quote
Idontknowwhy Posted April 1, 2009 Author Report Posted April 1, 2009 Your pilot ciciut is clogged.you sometimes need to use some small wire,welding wire or pins,take jet out and stick shit through there,when you blow through the pilot hole you should feel the air coming out of two pinholes in the carb throat Gotta update this, cuz i'm bout ready to hang up it up with this pos... Pilot circuit isn't clogged, Pilot jets no obstruction and there is no obstructions in the body itself... This thing is really giving me a headache guys, I've had the carburetors apart numerous times, new jets and floatvalves in it too.. I just can't see anything wrong with the carbs...Did a compression check both cylinders dead on at 90psi , i know not great, but shouldn't be a problem there..the only other thing is the reeds, I really don't know what im looking for but the reeds are laying flat against the cage , and when kicked over you can see them open up... Another thing this morning just for shits and giggles I went out and kicked it over once, kicked it one more time and it fired, idled rough, but i opened up the throttle and it took the revs but then bogged down and quit, i then realized i forgot i had a rag loosely stuffed in both carbs. This thing has never fired on its own and it did with a rag stuffed in it. I took rags out tried to start it and nothing, put them back in and nothing, i don't know what the fuck this things deal is...Someone's gotta have an idea, Please help before i sink this pos in the closest pond i can find Quote
2001Stroker Posted April 1, 2009 Report Posted April 1, 2009 When you put the new float valves in, did you adjust them to where they need to be? Also, 90psi is way low. Did you use a good name brand guage? Not sure if you know, but you have to kick these motors over about 15-20 times to get the guage to stop. And with the throttle pinned. Quote
Idontknowwhy Posted April 1, 2009 Author Report Posted April 1, 2009 When you put the new float valves in, did you adjust them to where they need to be? Also, 90psi is way low. Did you use a good name brand guage? Not sure if you know, but you have to kick these motors over about 15-20 times to get the guage to stop. And with the throttle pinned. Float seems to be adjusted properly, and i know the bike is due for a topend, but nevertheless it should still run, Gauge is a NAPA gauge, and after about 10kicks at WOT it stopped reading any higher thx for the reply Quote
F.T.W. Banshee Posted April 1, 2009 Report Posted April 1, 2009 Maybe you have the carb bowls switched. I dont know if that has anything to do with it but worth a try. I remember reading on her that one of the bowls have to go on a certain carb. Quote
Idontknowwhy Posted April 1, 2009 Author Report Posted April 1, 2009 Nah bike has never been apart and i put the same bowl back on the same carb.. Anybody need any parts????? Quote
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