apbt549 Posted July 31, 2006 Report Share Posted July 31, 2006 been fighting a jetting problem from idle to 1/8 throttle.you can sit in the driveway and try to rev the motor up and it bogs when you it the throttle before it will rev up..... if you try to rev it up slow it will rev up fine but if you try to hit it fast it bogs then rev's up.if you go to make a u turn in some sand or dirt and shift it down to 1st and try to hit the gas and make the bike slide around it just bogs.after the bog it runs fine .i tested it this weekend for air leaks held 6lbs of air for like 10mins so theres no air leaks i tried changeing the pilots from #42's all the way up to #50's still have the same problem.pull the choke out and the problem goes away.i have 28mm pwk's they came with 42 pilot in them when i got them they are brand new.could i need some pilots higher then 50's or is there another problem? maybe something missing in the carbs when they were put together?i know it doesn't have a air leak it held air for almost 10min didn't lose 1lb .....anybody? when the 50's were in there i went from 1/2 turn out to 2.5 turn out didn't make a difference maybe get some 52's or something.......anybody have some things i can check?if you run it thru the gears it runs great except for that bog at off idle......been fighting this for a few weeks now........ Quote Link to comment Share on other sites More sharing options...
ijustwannaride Posted July 31, 2006 Report Share Posted July 31, 2006 been fighting a jetting problem from idle to 1/8 throttle.you can sit in the driveway and try to rev the motor up and it bogs when you it the throttle before it will rev up..... if you try to rev it up slow it will rev up fine but if you try to hit it fast it bogs then rev's up.if you go to make a u turn in some sand or dirt and shift it down to 1st and try to hit the gas and make the bike slide around it just bogs.after the bog it runs fine .i tested it this weekend for air leaks held 6lbs of air for like 10mins so theres no air leaks i tried changeing the pilots from #42's all the way up to #50's still have the same problem.pull the choke out and the problem goes away.i have 28mm pwk's they came with 42 pilot in them when i got them they are brand new.could i need some pilots higher then 50's or is there another problem? maybe something missing in the carbs when they were put together?i know it doesn't have a air leak it held air for almost 10min didn't lose 1lb .....anybody? when the 50's were in there i went from 1/2 turn out to 2.5 turn out didn't make a difference maybe get some 52's or something.......anybody have some things i can check?if you run it thru the gears it runs great except for that bog at off idle......been fighting this for a few weeks now........ Mine was doing that same exact thing last weekend in the sand....no answer yet though, sorry. I let you know if I figure something out. Quote Link to comment Share on other sites More sharing options...
apbt549 Posted July 31, 2006 Author Report Share Posted July 31, 2006 yeah let me know what you come up with.and if i come up with something i will pos it on here..... Quote Link to comment Share on other sites More sharing options...
dajogejr Posted July 31, 2006 Report Share Posted July 31, 2006 Yeah, we've been trading PMs back and forth for some time. Maybe a member in your area can help out....it's gotta be something. That pressure test didn't drop at all? normally...they'll drop a 1lb or so every minute or so... Have you tried bumping the clip down one or two spots towards the pointed end to richen it up. You say if you pull the chokes, it goes away...so, maybe it needs more gas from the needle.... Quote Link to comment Share on other sites More sharing options...
apbt549 Posted August 1, 2006 Author Report Share Posted August 1, 2006 daj first tks for all the help..i haven't tried that yet but i have a friend thats supposed to come over in the next week or so to help me this i am in no big hurry now just had shroulder surgery today so no big hurry .....no the gauge didn't drop 1lb it was in there for over 6mins .i am also thinking about what you said and taking the carbs apart one at a time also.i will mess with the air screw with the 48's pilots in there first and go from there..i was hoping it was a air leak but no such luck Quote Link to comment Share on other sites More sharing options...
dajogejr Posted August 1, 2006 Report Share Posted August 1, 2006 Oh no...believe me, you don't want it to be an air leak. I redid my motor twice, and that was enough. I paid a friend to redo it the next two times... No prob...wish I could help more! Quote Link to comment Share on other sites More sharing options...
dirtyernie52 Posted August 2, 2006 Report Share Posted August 2, 2006 raise the clip on your needles. that will give you more gas from take off. you said you pulled the choke and it was better! if it gets worse when you raise the cilp, then try lowering it until you find the sweet spot. remember only 1 position at a time. try this: http://ktmtalk.com/uploaded_pics/carbtuning.pdf Quote Link to comment Share on other sites More sharing options...
dajogejr Posted August 2, 2006 Report Share Posted August 2, 2006 raise the clip on your needles. that will give you more gas from take off. you said you pulled the choke and it was better! if it gets worse when you raise the cilp, then try lowering it until you find the sweet spot. remember only 1 position at a time. try this: http://ktmtalk.com/uploaded_pics/carbtuning.pdf That's backwards... If you lower the clip (towards the pointed end) it will give more fuel... The sooner the needles raises, the more fuel (richer)... He and I PM'd quite a few times, and I did suggest this. Obviously, there's a clog somewhere, or...it's starving for fuel. Quote Link to comment Share on other sites More sharing options...
dirtyernie52 Posted August 3, 2006 Report Share Posted August 3, 2006 That's backwards... If you lower the clip (towards the pointed end) it will give more fuel... The sooner the needles raises, the more fuel (richer)... He and I PM'd quite a few times, and I did suggest this. Obviously, there's a clog somewhere, or...it's starving for fuel. ya i meant raise the needle not the clip. i must have had a brain fart Quote Link to comment Share on other sites More sharing options...
apbt549 Posted August 3, 2006 Author Report Share Posted August 3, 2006 i will try that and see what it does.i will move the clip down one spot.. Quote Link to comment Share on other sites More sharing options...
David Keith Posted August 6, 2006 Report Share Posted August 6, 2006 been fighting a jetting problem from idle to 1/8 throttle.you can sit in the driveway and try to rev the motor up and it bogs when you it the throttle before it will rev up..... if you try to rev it up slow it will rev up fine but if you try to hit it fast it bogs then rev's up.if you go to make a u turn in some sand or dirt and shift it down to 1st and try to hit the gas and make the bike slide around it just bogs.after the bog it runs fine .i tested it this weekend for air leaks held 6lbs of air for like 10mins so theres no air leaks i tried changeing the pilots from #42's all the way up to #50's still have the same problem.pull the choke out and the problem goes away.i have 28mm pwk's they came with 42 pilot in them when i got them they are brand new.could i need some pilots higher then 50's or is there another problem? maybe something missing in the carbs when they were put together?i know it doesn't have a air leak it held air for almost 10min didn't lose 1lb .....anybody? when the 50's were in there i went from 1/2 turn out to 2.5 turn out didn't make a difference maybe get some 52's or something.......anybody have some things i can check?if you run it thru the gears it runs great except for that bog at off idle......been fighting this for a few weeks now........ Why don't you lower the metering needle clip by one notch... been fighting a jetting problem from idle to 1/8 throttle.you can sit in the driveway and try to rev the motor up and it bogs when you it the throttle before it will rev up..... if you try to rev it up slow it will rev up fine but if you try to hit it fast it bogs then rev's up.if you go to make a u turn in some sand or dirt and shift it down to 1st and try to hit the gas and make the bike slide around it just bogs.after the bog it runs fine .i tested it this weekend for air leaks held 6lbs of air for like 10mins so theres no air leaks i tried changeing the pilots from #42's all the way up to #50's still have the same problem.pull the choke out and the problem goes away.i have 28mm pwk's they came with 42 pilot in them when i got them they are brand new.could i need some pilots higher then 50's or is there another problem? maybe something missing in the carbs when they were put together?i know it doesn't have a air leak it held air for almost 10min didn't lose 1lb .....anybody? when the 50's were in there i went from 1/2 turn out to 2.5 turn out didn't make a difference maybe get some 52's or something.......anybody have some things i can check?if you run it thru the gears it runs great except for that bog at off idle......been fighting this for a few weeks now........ Why don't you lower the metering needle clip by one notch... This will mix more fuel quicker with the incoming rush of air when you gas it. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted August 6, 2006 Report Share Posted August 6, 2006 Good thing you posted that twice, I wasn't clear the first time... :shrug: Quote Link to comment Share on other sites More sharing options...
apbt549 Posted August 8, 2006 Author Report Share Posted August 8, 2006 you are talking about the needle right.just move the clip down one notch right.... Quote Link to comment Share on other sites More sharing options...
steveodo Posted August 8, 2006 Report Share Posted August 8, 2006 hey apbt the needle is for your mid range leave it be your going the wrong way on your pilots ,I would try some 30's an go from there. I had they same problem :beer: Quote Link to comment Share on other sites More sharing options...
dajogejr Posted August 8, 2006 Report Share Posted August 8, 2006 hey apbt the needle is for your mid range leave it be your going the wrong way on your pilots ,I would try some 30's an go from there. I had they same problem :beer: You realize he has Keihin PWKs, not stockers, right?? Quote Link to comment Share on other sites More sharing options...
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