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Buell Motorcycle Forum » XBoard » Buell XBoard Archives » Archive through June 18, 2009 » Rain - Back Firing and Foul Starting? « Previous Next »

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Geforce
Posted on Friday, June 12, 2009 - 10:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

We rode back through some thick nasty on our way back from homecoming. Bike ran just fine on the way home.

Pulled into the garage, took the bags off, seat off, turned the cage fan on high and let them air dry. Pulled it in the next day to let the battery charge up, 3-4 days later I go to start it up and it's backfiring through the intake and didn't want to start for a while until I held the throttle open a little bit. After running it a while it seems to be better, it will idle better, but when you open the throttle a little it starts to choke a tad. Fuel pump is priming fine, not sure what else to check.

2009 XB12Scg 1900 miles, three weeks old.

She said it got a little bitchy about the last tank of gas we put in her before the heavy rain started. I'm hoping it's just bad gas. I hate to take it in if there's nothing wrong, so what else can I look at?
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Iamarchangel
Posted on Saturday, June 13, 2009 - 12:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The straight-forward step would be to put fresh good gas in and see what that does.

Bit confused about what you did in the garage. Did you leave the bike outside in the rain uncovered?

When you got it started, did you go for a ride? If not, might simply be a cold start, weak spark, partial flooding and rough running until everything's dry. Should never really just start the bike up for no particular reason. If that's the case, it's not an uncommon sequence.
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Geforce
Posted on Saturday, June 13, 2009 - 01:12 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

After the ride a few days ago, I pulled both bikes into the garage, and turned on the big cage fan to help dry them *rode through some heavy rain on the way back home* and all the gear out. They remained there for 3-4 days and I plugged them in after one day of sitting so the batteries could rejuice. I took the bike for a little trip around the street to see if I could maybe just get it up to operating temp after it had idled for a bit, it was still stumbling.

I started the bikes up to move them and to make sure everything was good to go for a ride on Sunday.
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Ulynut
Posted on Saturday, June 13, 2009 - 07:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Plug wires are usually the culprit. How is the humidity in your garage? Could be that they didn't dry out completely.

Also check any electrical connectors that might be loose.
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Roysbuell
Posted on Saturday, June 13, 2009 - 08:38 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I had a similar problem and the plug wire had vibrated loose from the coil. It was still attached but was not making proper contact. You can use die-electric grease to block out moisture.
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Iamarchangel
Posted on Saturday, June 13, 2009 - 12:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

If it's still stumbling today, check the plug wires are all the way. It it feels like any moved into place, go for a ride and see if that made a difference. If you didn't feel anything move, spray WD40 over the plug cables from coil to cap. If that works then your cables have cracks and need replacing, or carry a small can of WD40 for a while.

Sometimes a loose battery connection will do that but it sounds like you've already looked there. Give them a wiggle and make sure they're secure.
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Geforce
Posted on Saturday, June 13, 2009 - 05:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Thanks for the tip gents. I live by di-eectric grease and always use it on connections when I dig into stuff. I will give these things a shot and she how she does. 'preciate it!
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