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 February 28, 2007 » S1 Backfire « Previous Next »

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

Quicksilver
Posted on Monday, May 29, 2006 - 08:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What will cause a í98 S1 Lightning to backfire??? Itís not very consistent. It will start and idle just fine, the when I roll on the throttle to launch, it will die out and pop. When cruising down the road, it will bog down and snap and crack, then smooth out. I thought maybe I had a bad batch of fuel, so I ran through a full tank, and no help. Iíve been running high octane fuel (93). I have also recently changed the plugs & wires, air filter, and all oils. Everything is stock, except the after market exhaust. Any help is appreciated. Thank you.
Top of pagePrevious messageNext messageBottom of page Link to this message

Road_thing
Posted on Monday, May 29, 2006 - 09:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"...recently changed plugs & wires..." I'm not trying to knock your mechanical skills, but that's where I'd look first.

If that's not where the problem lies, check all the "standard" gremlins: sidestand safety switch, intake seals, tank vent.

Lots of information in the Knowledge Vault.

Good luck, let us hear what you find.

rt
Top of pagePrevious messageNext messageBottom of page Link to this message

Kahuna
Posted on Tuesday, May 30, 2006 - 09:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

A blocked, or slightly blocked slow jet could be it as well...
Top of pagePrevious messageNext messageBottom of page Link to this message

Quicksilver
Posted on Tuesday, May 30, 2006 - 08:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I double checked the plugs and wires. Everything seems fine. I'll check the rest......thanks.
Top of pagePrevious messageNext messageBottom of page Link to this message

Quicksilver
Posted on Tuesday, May 30, 2006 - 08:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

When I rev the bike it sounds like its sucking air. Should I be able to hear that?? How do I check the intake seals?? Also, everyone says blocked slow jet makes them run lean. But shouldnt it be more consistent if its blocked? Can I hurt the bike by riding it to lean?????
Top of pagePrevious messageNext messageBottom of page Link to this message

Sparky
Posted on Tuesday, May 30, 2006 - 08:31 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sounds like an intermittent high voltage breakdown. See if you can borrow a known good coil. If a different coil works OK, then spring for a Screaming Eagle coil.
Top of pagePrevious messageNext messageBottom of page Link to this message

Blake
Posted on Wednesday, May 31, 2006 - 12:37 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check for intake manifold seal air leakage by setting the bike at a fast idle, around 2000 rpm, and spraying contact cleaner or WD-40 or even a fine mist of water liberally all around each seal. If the idle changes noticably, you've found an air leak.

Put your old wires back on and see if the problem remains? Check/change spark plugs?
Top of pagePrevious messageNext messageBottom of page Link to this message

Quicksilver
Posted on Wednesday, May 31, 2006 - 10:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

ok thanx fellas. ill check it out this weekend. ill get back to ya, hopefully with a conclusion.
Top of pagePrevious messageNext messageBottom of page Link to this message

Quicksilver
Posted on Monday, June 05, 2006 - 07:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Could a leaky head gasket be the problem??? I sprayed starter fluid around the intake, and it definitely affected the idle. But ,I couldnt tell if it was pulling from the intake, or the front head gasket??????? I'm assuming to start with the intake, seems like an easier and less expensive job.
Top of pagePrevious messageNext messageBottom of page Link to this message

Quicksilver
Posted on Monday, June 19, 2006 - 09:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ok, I finally got it!!!! I cut that stupid kickstand safety switch off, and she purrs like a kitten. I did end up replacing the intake seals, and flushing the carb anyway. I figured it need it. Back to burning up the blacktop!!! Thanks for all your help!!!
« 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