LiftdT4R Posted December 13, 2007 Report Posted December 13, 2007 Allright, I've been monkeying around with this thing for a week now, and we're due for some snow this weekend and it still won't run. I took apart the carbs because the 270s I had were a little rich, and I wanted to bump back down to 260s. Mods are LRD pipes, and full w/ full airbox at sea level, around 32-50 degrees. Have the 27.5 pilots, about 1.5 turns out on the screw, and I have the carb sych tool from Jeff too, and the TORS is removed with the kit. The bike ran on spot, a little rich before I pulled the carbs apart. Now that it's back together it won't run at all even if you kick it all day long. The slides are in correctly(cut out towards the back), bowls are on the right sides(one with the jet on the choke master side), and I througholy cleaned the carbs before I put them back together. I started it once with the spray(bad idea I know), and it ran until the spray burned off and then died. Wouldnt keep running even with the slides open. I get plenty of spark too, plenty of gas, and the petcock is on. I'm at a loss here. Is it maybe the reeds, I'm going to check them in a few, but I don't see how cause it ran fine since it was together last time. It also has plenty of compression, 120PSI in both cylinders. Any help would be greatly appreciated, I'm not getting very far here, I've had the carbs apart and back together about 5 times in the last week to check and double check. :beer: Quote
LiftdT4R Posted December 13, 2007 Author Report Posted December 13, 2007 Ohh yeah, stock needles on the middle clip. Quote
91banshee Posted December 13, 2007 Report Posted December 13, 2007 are you for sure its getting fuel ? if it starts with starting fluid and then quits then its starving for fuel . sometimes when carbs are taken apart the float adjustment can get outawack and close to soon and gas will be just shy of the jets . Quote
Washburn Posted December 13, 2007 Report Posted December 13, 2007 did you try the spray around the reeds and the head before you started it up? Mabey your sucking air from some place. Check the small stuff before you take it all apart and give youself a headache not finding anything. Gas in the tank? Try starting it on reserve without the choke and without giveing it gas prior to one blip of the throttle before you start it. Are you getting spark? Quote
wacko2000 Posted December 13, 2007 Report Posted December 13, 2007 make sure the choke tube is on... Im guilty of forgetting that acouple of times.. Quote
LiftdT4R Posted December 13, 2007 Author Report Posted December 13, 2007 Just pulled the reeds. They look perfect. Choke tube is on, done that before. Also, the floats line are parallel to the carbs when the bowl is off, and the fuel valves looks to be in good shape. All the clamps are tight, and I'm pretty sure all the gaskets are good. Like I said, it ran just about perfect before I took the carbs apart. Spark looks fat too. Like 91banshee said, it would seem that it's starved for fuel, but I'm not seeing how, the bowls do fill up with gas, and the idle is set at about half way, I've even tried starting it with the slides up higher, and nothing. I'm fuckin lost on this one. Quote
Screaming Yellow Zonker Posted December 13, 2007 Report Posted December 13, 2007 does it try to rev up when started on fluid? did you check if you sucked some debris into the jets? Pop the pilots out and run a small piece of wire through them. did you adjust the choke screw on the bowl? Quote
LiftdT4R Posted December 13, 2007 Author Report Posted December 13, 2007 Pilots are clean as a whistle, in fact, everythign I could take apart and clean, I did. The floats are at the correct height, 21mm. What do you mean by choke screw? Just where the choke screws into the carb body? If so, it is clean, and a little better then finger tight. Also, the bike revs to the moon with the start spray(I think because the shits so flammable). That shit is bad news, but I like to use it to trouble shoot. Quote
Screaming Yellow Zonker Posted December 13, 2007 Report Posted December 13, 2007 the choke screw is on the bottom of the bowl. when you look into the carbs how high are the slides it sounds like the slides are 180* in the bores... Quote
91banshee Posted December 13, 2007 Report Posted December 13, 2007 the choke screw is on the bottom of the bowl. when you look into the carbs how high are the slides it sounds like the slides are 180* in the bores... choke screw ? only screw on the bottom of stock carbs is a screw to drain gas outa the bowls Quote
LiftdT4R Posted December 13, 2007 Author Report Posted December 13, 2007 No I havent tried the choke screw, I never really messed around with it, I'll have to take a look, but Ive never touched it and it always ran fine. The slides look to be maybe about 20-30mm from the bottom of the venturi to the highest point of the ridge. They look fine. They are also in the bore correctly, with the cutout pointing back towards the air box. That's one of the first things I checked. Also, the choke tube IS there. I can't for the life of me figure out whats going on, and I'm about done for tonight. It seems like the fuel isnt making its way into the cylinders, but the bowls fill up, and all the jets are clean as a whistle, and so are the carbs. The bike ran 100% on spot, with the exception of being a little too rich, and the only thing I took apart were the carbs. I dont know what the hell I did, but there's gotta be somethin wrong. Quote
zach45 Posted December 13, 2007 Report Posted December 13, 2007 all i can think of.... is washer behind the mains? Quote
Screaming Yellow Zonker Posted December 13, 2007 Report Posted December 13, 2007 how far can you move the throttle before it starts to open? did you have to compress the springs to get the caps on? are the seals still on the carb caps. Please excuse me. I'm not trying to ask a bunch of pointless q's. Just trying to get an understanding of what might be wrong. Quote
blowit Posted December 13, 2007 Report Posted December 13, 2007 Sure sounds like the floats are in upside down which will cause no fuel flow to the float bowls. You are not getting fuel. If that checks good, better clean the pilot jets again. Brandon Quote
. Posted December 13, 2007 Report Posted December 13, 2007 you try starting it without the filter/airbox lid on? try taking your gas cap off? are your plugs getting soaked? Timing? Quote
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