roosthrower Posted August 16, 2004 Report Share Posted August 16, 2004 when I pin it in first at low rpm, it will pick up quick fall right on it's face for half a second, then hit the powerband hard. what should I play with? or is this just something that can't be jetted away. Quote Link to comment Share on other sites More sharing options...
FATBANSHEE Posted August 16, 2004 Report Share Posted August 16, 2004 I would try raising the clip on the needles 1 notch. which will drop the needle down and lean it out a little bit. give it a try and see how you make out. let me know if this fixes it or not? good luck. ...FAT Quote Link to comment Share on other sites More sharing options...
sredish Posted August 16, 2004 Report Share Posted August 16, 2004 falling on it's face, is it bogging flat, or sputtering when it falls? If it's just bogging dead, you could still be a tad lean, or if it sputters once or twice then it could be something else. Quote Link to comment Share on other sites More sharing options...
roosthrower Posted August 17, 2004 Author Report Share Posted August 17, 2004 I guess I could be a tad lean needle wise, but with the needle in the stock position, I would foul plugs at half throttle over an extended amount of time. I leaned it out one clip, and I haven't fouled another plug yet. If anything, I am rich on the mains. I had 400's in there but they looked a tad lean. I bumped up the mains to 420's and while performance did go down slightly, it isn't anywhere near fouling at full throttle and I am willing to sacrifice one or two horsepower for some longevity. Maybe I should play with the air screws. I am running stock pilots with the screws turned out 1.5 turns. Quote Link to comment Share on other sites More sharing options...
sredish Posted August 17, 2004 Report Share Posted August 17, 2004 Hows your airbox setup? If you have the lid on, you might pull it off just to see if it clears up. I'm kinda with you on the rich main thing, at a low rpm, your probably throwing a lot of fuel, and it's just a tad behind on the air, causing the bog and when the air catches up it hits the powerband. Make sense? That's my theory at the moment anyway. Later. Quote Link to comment Share on other sites More sharing options...
roosthrower Posted August 17, 2004 Author Report Share Posted August 17, 2004 sounds like I need some larger carbs. your theory sounds pretty good. I'm probably just drowning the motor with fuel it doesn't know what to do with until it gains some revs. I'll tinker with the air screws and see what happens, but chances are I wont get rid of this completely. Quote Link to comment Share on other sites More sharing options...
sredish Posted August 17, 2004 Report Share Posted August 17, 2004 sounds like I need some larger carbs. What size carbs are you running? Quote Link to comment Share on other sites More sharing options...
roosthrower Posted August 17, 2004 Author Report Share Posted August 17, 2004 stock 26's. Quote Link to comment Share on other sites More sharing options...
mrmatt Posted August 17, 2004 Report Share Posted August 17, 2004 when I pin it in first at low rpm, it will pick up quick fall right on it's face for half a second, then hit the powerband hard. Sounds like a lean hesitation. Turn your air screws in one complete turn and see if it is better. If so, then buy bigger pilot jets. I would guess that you need 30s. Quote Link to comment Share on other sites More sharing options...
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