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xs650 > > Motorcycle Systems > > Fuel > > falls flat on WOT |
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Onthewind New Member
Joined: May 10, 2005 Posts: 1
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Posted: August 6, 2005, 8:28 am Post subject: falls flat on WOT |
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I recently installed vm 34 carbs on my 82-650. Mac 2-2 exhaust, K&N filters. Carb set up is 6f9 needle, p-6 needle jet, 180 main, 20 pilot. Problem is when I'm under 4K rpm and go wot the bike falls completely flat if I back off to under 3/4 throttle it comes back and alive and then if I ease it up to full throttle it runs fine. If I start in 1st and go through the gears it runs great all the way to 7K rpm. I'm not sure when it started doing this but it seems to have happened when I replaced a bad rotor but not sure how that could cause the problem. Bike starts good, idles good plugs look good maybe a little white. Any help would be appreciated.
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grizld1 Full Member
Joined: Jun 20, 2005 Posts: 594 Location: Carbondale, IL
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Posted: August 6, 2005, 9:31 am Post subject: Re: falls flat on WOT |
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The rotor pickup spot impacts ignition timing. There's enough variation in key slotting, etc., from unit to unit that your timing may have drifted with installation of the new rotor. Check timing with a strobe. You may need to drill out the pickup unit screws, install new ones, and retime.
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