Hi, I have a 97 1500 Vulcan Classic. I started the bike up yesterday while it was still in the trailer. I hadn't started it for about a week. I have a couple of things going on at this point. #1 is the choke keeps pulling back in on it's own with in a couple of seconds of pulling it out and #2 I noticed after about 3 minutes of warming the bike at about 1500 rpm the pipes under the heat shield are glowing red hot. Any Ideas as to what may be happening?

Kik

 

Well I originally posted this message in Oct and I haven't gotten anyone to even give a reply. I guess people on this sight must not work on they're own bike. Thanks anyway.

 

I remember your post, this forum slow, my choke goes in too, but slowly, I think so you want forget it.

 

Sounds like it's running too lean. Oh and how about an introduction before you stat giving us a hard time for not responding. But seriously sorry for not seeing this one, sometimes if a post is not answered in the first day, it quickly gets buried. Thanks for stopping by.

 

actually, sorry to correct, but a rich condition will cause pipe glowing.. you're getting fuel in the pipe and its burning there.

lean conditions ARE incredibly hot as well, so i will absolutely not rule that out.. lean is mean, as they say. (love ya deej!! )



BUT, at the same time, exhaust temps are about 1800*F, so at idle, with no air flow, the pipe is bound to heat and retain that heat.

you can always reset the mixture screws and if you can get your hands on a wideband O2 sensor, map out what your A/F is and adjust from there.

good luck, welcome to KF, and hopefully you didn't "quit" us..

 

Whitehendrix, You're absoluely correct. It's a rich condition and the fuel is building in the front pipe. Also the the slow idle jet was plugged and it was creating a vacuum in the carb to the point of pulling the choke in and not letting the back cyl fire correctly because it was getting too much air.

 

I stand corrected Wow, it was bound to happen some day. I knew that the day would come when I was wrong.

 

i still love and respect ya deej!!

lol.. remember, i do this stuff for a living.. hehe

Kik- if you haven't synced yet, do so at about 4000rpm.

i think you'll like the results

 

People think that a glowing exhaust pipe means lean, when it is almost always a rich condition or a timing issue...Just really thinking about it, if your so lean that a steel pipe is glowing red, your aluminum piston would be a melted down mess..