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1stbuell
Posted on Friday, May 12, 2006 - 06:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Today as I was riding, the bike would idle at about 2100-2300 rpm's when stopped. Yesterday I adjusted the idle because it was a little low to about 1050 and added some oil, and it ran just fine. It idles normal when you start it but then while riding it just won't come down most of the time.

Any ideas?
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Old_man
Posted on Friday, May 12, 2006 - 06:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The idle is too high. Adjust it by the tach till it stays above 1000 rpm. It fluctuates some. As long as it doesn't go below 1000 rpm as it dances you should be OK. I had the same problem, now solved.
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Buellfirebolt31
Posted on Friday, May 12, 2006 - 07:31 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mine did the same thing, so i talked to my mechanic here at work(fantastic on Buells). He said that if it doesn't stay up near 2500-3000 when stopped you should be fine. this usually occurs after riding some distances. remember these beasts are air-cooled and this is a way to decel the engine speed. if you sit at a light long enough it will come down. give it like 2-30 seconds. Bradley
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Fullpower
Posted on Friday, May 12, 2006 - 08:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

yes hanging idle IS a VERY COMMON "feature" of the DDFI. all you can do is set idle as close to the low end of the specified range 1050-1150 rpm. set idle speed on a HOT engine. if you set it before it reaches full operating temperature than it will be too high when it warms up. if idle speed is set too low it will be hard to start, and wont stay running when cold. kind of a fine balance there. good luck, and hopefully you dont need to replace your intake manifold seals.
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Odinbueller
Posted on Friday, May 12, 2006 - 08:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Always adjust your idle after the engine is at operating temperature. Hot idle should be set at about 1000 RPM, no less. If it's too high, you'll get hung up on engine deceleration, just like you mentioned.

Go for a quick 10 mile ride, adjust your idle, and see if the problem persists. If so, other things are wrong.

Hope this helps,

Chris
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1stbuell
Posted on Friday, May 12, 2006 - 08:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks for the tip guys. I know it was not hot when I set it. I have a track day tomorrow and will check it and set it when it's warmed up.
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Sik_s
Posted on Saturday, May 13, 2006 - 05:57 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you have the VDSTS or DL or know someone that does, I would just do a TPS reset to ensure it is set right. With these you adjust the final idle speed after the engine reaches 320'F.
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Lovematt
Posted on Saturday, May 13, 2006 - 09:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

When setting the idle you need to make sure it is really really REALLY warmed up. It can take a while to get above 300 Degrees Farenheit.

The last time I did the TPS reset with the VDSTS it took at least 5 minutes of idling to get it above 300F. I adjusted the idle at about 250F to see what happened and my bike would hang on a high idle at times.

The next day I let it idle to above 300F and set the idle and the idle has been rock solid since then and comes right down to where it should noticably quicker than before.
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1stbuell
Posted on Saturday, May 13, 2006 - 07:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks again,

I got it nice and warmed up, then adjusted the throttle and all is good!

Is there a better place on the planet for Buell info? HELL NO!

Badweb rocks again.

(Message edited by 1stbuell on May 13, 2006)
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