G oog le BadWeB | Login/out | Topics | Search | Custodians | Register | Edit Profile

Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Troubleshooting (Poor Starting/Running/Handling/Ride Issues) » Archive through August 08, 2007 » Engine popping through carb at 3krpm or less « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Milesvdustin
Posted on Thursday, June 21, 2007 - 10:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hey everyone. I have a 98 s1 with vance and hines, andrews cams, and an s&s super e carb. My problem is, anytime i ride below 3k rpm, it pops somewhat through the carb every so often, and occasionally a backfire. Do i need to adjust the mixture screws, or get the low speed circuit rejetted? Thanks!
Top of pagePrevious messageNext messageBottom of page Link to this message

Sparky
Posted on Friday, June 22, 2007 - 01:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Has it always done this or is it a fairly recent phenomenom? If it is recent, the problem may be due to intake manifold seals drying out and leaking air. An intake air leak, however minor, will surely result in what you are experiencing.

If it has always done this though, that would indicate that the carb setup is not quite dialed in and could benefit from slightly richening up the idle circuit. If it still pops & farts after adjusting the idle mixture, then the low speed circuit could probably be rejetted slightly richer.
Top of pagePrevious messageNext messageBottom of page Link to this message

Milesvdustin
Posted on Saturday, June 23, 2007 - 04:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I adjusted the idle circuit mixture until it seemed to be running a hundred percent better at idle. I did it according to the S&S service manual. I picked the median position between too lean and too rich by adjusting it until it almost dies either way, and then going to halfway between. My bike immediately started to idle a LOT better, so much so i had to turn the idle down. It runs great now, i ran a tank of 93 through it and its great. Thanks everyone~!
Top of pagePrevious messageNext messageBottom of page Link to this message

Jerseybuell
Posted on Wednesday, June 27, 2007 - 11:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Usually 1 1/2 turns CCW after it bottoms out is the preferred method as you stated. Also, watch your plugs as you can further tweak your mixture..it's a good carb to dial into..been running the Super E on my XLH1200 since '91.
« Previous Next »

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
This is a private posting area. Only registered users and custodians may post messages here.
Password:
Options: Post as "Anonymous" (Valid reason required. Abusers will be exposed. If unsure, ask.)
Enable HTML code in message
Automatically activate URLs in message
Action:

Topics | Last Day | Tree View | Search | User List | Help/Instructions | Rules | Program Credits Administration