DIRTBIKEZ Posted April 3, 2004 Author Report Posted April 3, 2004 The idle screws are backed out all the way. The slides appear to be seated fully and there is the correct amount of free play in the throttle cable. I checked for an airleak also around the carb/boot area. The problem came right after piping and rejetting. The larger pilots do "seem" (to me) like a possible solution though. Doesn't a lean motor rev higher? I want to say that I tried choking it and giving it minimal throttle, bringing positive results. Which would support the larger pilot theory... but it may just be in my head. Quote
Banchetta Posted April 3, 2004 Report Posted April 3, 2004 The larger pilot is not the answer, you have another problem...Did you put the slides in backwards?? cutaway facing the air box....the motor is an air pump, it can't rev unless it can get the air...w/o air, how can it rev??? Quote
DIRTBIKEZ Posted April 3, 2004 Author Report Posted April 3, 2004 The slides have the "cutaway" facing the airbox. Any other ideas? I really do appreciate the help. Quote
Banchetta Posted April 5, 2004 Report Posted April 5, 2004 hmmm.....its getting air somehow...the cable has play where?? by the thumb?? make sure the junction box for the cable isn't binding and also check the carb tops to make sure the tube is in the top and not pulled out....If thats all good, then pull the air cleaner and look at the slides, make sure they are both "bottomed" out fully, the slightest lift (1mm) will make the motor rev 1000rpms... Quote
DIRTBIKEZ Posted April 5, 2004 Author Report Posted April 5, 2004 The cable freeplay is as the throttle. The cable is new so I dont think the junction would be binding but will have a look anyhow. The tube is seated fully ontop of the carbs. I will also check the see that the slides are FULLY bottomed out. Didnt think the slightest amout would have made that difference but it does make sense. Quote
bigboybanshee Posted April 5, 2004 Report Posted April 5, 2004 Did you check to make sure the choke tube is in there? This weekend I was rejetting and completely forgot about it until it was idling high. Could be a possiblity... Quote
DIRTBIKEZ Posted April 5, 2004 Author Report Posted April 5, 2004 Yes I did check the choke tube... made that mistake once already so I constantly check it. Quote
GONRIDIN Posted April 5, 2004 Report Posted April 5, 2004 .............Idle is too high because its lean???......Leanness doesn't cause a high idle... I disagree with this statement. Running to lean of a pilot jet can cause a high idle. It's just like turning your air screws out to far. DIRTBIKEZ, It sounds like you have the right idea. You have checked the correct things and I don't think you have an air leak. It is posibble for a different exaust sytem to lean you out on the bottom end so I would try the richer pilot jet jet. I see this all the time on dirt bikes and sleds. After you change you pilot you will need to try adjusting you air screws again. Good luck. Quote
Banchetta Posted April 6, 2004 Report Posted April 6, 2004 Turning the air screws out too far increases air flow passed the slides so the motor will rev higher....it doesn't take much.....I've NEVER seen lean pilots rev a motor that you can't control w/ the idle screws...If its revving, then the motor likes it. why choke it out and hurt throttle response????? Quote
DIRTBIKEZ Posted April 11, 2004 Author Report Posted April 11, 2004 Would lifting the needles one notch above stock have any affect on the idle? I put larger pilots in which definitely helped in the low and mid end as well as lowered the idle a bit. I am going to disconnect the throttle cables completely to see if that helps at all. Still stumped. Quote
Banchetta Posted April 11, 2004 Report Posted April 11, 2004 Maybe when you tapped the holes for the idle screws, there is a burr inside the carb holding the slide....I'd just look through the intake of the air cleaner w/ a flashlight and see if the slides are "bottomed out"....then go from there....you should be able to move the throttle up and down and hear the slides hitting the bottom... Quote
DIRTBIKEZ Posted April 15, 2004 Author Report Posted April 15, 2004 I checked for both burrs and binding cables didnt find either. Now I'm having problems with the left cyliner... its not firing. I'm getting very, very discouraged here. I pulled both carbs again and gave them a good cleaning. I am going to try stepping the pilots down to 27.5 or maybe even back to 25. The right cylinder starts first kick, switched plugs and boots still no left. Quote
Banchetta Posted April 16, 2004 Report Posted April 16, 2004 Have you looked into the intake yet from the air cleaner?? Can you hear BOTH slides bottoming out when you move the throttle?? Quote
DIRTBIKEZ Posted April 16, 2004 Author Report Posted April 16, 2004 I can hear and see both slides bottoming at the same time. This afternoon I noticed that part of the problem may be related to the petcock. She runs great on RES till its empty or until I turn it ON then back to RES . Is it possible that it may be clogged? Another thing I noticed was the crossover tube was pressed so far downward into the intake manifold that there was 1/2" or more pertruding so I corrected that. Wasn't able to to give her a good run today, weather and time permitting we'll see about tomorrow. Thanks once again for everyones help, especially Banchetta . Quote
Banchetta Posted April 16, 2004 Report Posted April 16, 2004 You could also try spraying some wd40 or starter fluid around the intake and carb boots to see if it revs up. If it does, then you have a leak.... Quote
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