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Buell Motorcycle Forum » Old School Buell » Archives OSB 001 » Archive through May 29, 2007 » Questions on carb rebuild « Previous Next »

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Johnnymceldoo
Posted on Monday, May 21, 2007 - 10:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My S1 started idling very low today when pulling into the mall parking lot. I went in to pay a bill and came back out and fuel had leaked out from the air filter. I got it running after wiping the fuel off figuring it was a stuck float needle.

When I got back to work it didnt do it again but when I left and got to the gas station it did it again. I pulled the carb later on tonight and inspected the float and needle and didnt see anything that stuck out. No visible dirt and the needle looked fine. I know from lawmower carbs a worn out float needle may not LOOK worn out but it can be.

I got the carb back together and filled up and it didnt leak again. I didnt start it though. The bike has 8200 miles on it and probably sat around alot being a 97. Maybe its time for a carb rebuild? Do most harley shops carry the kits for this carb? Its the factory carb.
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Djkaplan
Posted on Tuesday, May 22, 2007 - 08:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

A dealer should have one. I've had the needle stick on my carb before; it almost left me stranded when the rear cylinder flooded. Probably some debris that got caught in the cut-off valve seat.

Been in a few lawn mower carbs too, eh? Those infernal little things never cease to amaze me.
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Ratbuell
Posted on Tuesday, May 22, 2007 - 08:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you're going to be in there anyway, it's a good time to upgrade to a Thunderslide kit from Dynojet. I'll doublecheck with the techs...but there's a recipe for the best response. I think it's using the Thunderslide shutter (plastic, not metal - quicker response) with the stock shutter spring so it doesn't "float". The kits are usually around $45 or so, and you get an assortment of jets in there as well as a handy-dandy instruction sheet with pictures, which I always need : )
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Sparky
Posted on Tuesday, May 22, 2007 - 12:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Are you turning off the petcock when parking the bike?

If not and you notice gas drooling out the air filter, be very careful when attempting to start the engine. A leaking float could flood a cylinder with gasoline which potentially could result in hydraulic lock and major engine damage.

Having had my S1 leak like this once, I did a tap, tap, tap on the start button to see if the engine was going to rotate through a cycle before trying to start it. It was OK, but if it wouldn't rotate, I was prepared to remove a spark plug to squirt out any accumulated gas.
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Reepicheep
Posted on Tuesday, May 22, 2007 - 12:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sounds like a little gunk in the carb.

Needles are cheap, so it wouldn't hurt to replace it. But on the other hand, if it ain't broke now...
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Johnnymceldoo
Posted on Tuesday, May 22, 2007 - 01:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have it at work today and am on lunch right now. No leaks so far.

Ratbuell, the previous owner had a buddy change jets when he added a vance and hines. I dont know the extent of mods but this bike has ran pretty good thus far. Seems like alot of people say switching to a makuni is big change in feel. At least from what Ive read.
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Ratbuell
Posted on Tuesday, May 22, 2007 - 01:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The only thing I don't like about the Mikuni (and again, this is preference...YMMV) is they seem to be more of an on/off switch rather than a progressive system. They're great for drag racing where you're all or nothing, but on the street I prefer a properly built stocker. Just my .02 (and some folks will tell ya it's not even worth that!).
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Djkaplan
Posted on Tuesday, May 22, 2007 - 02:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I rode a Mikuni equipped S1 just recently and was pleasantly surprised at the crisp throttle response. Now I have to have one.

Thanks for the ride on the S1, Tim!
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Johnnymceldoo
Posted on Wednesday, May 23, 2007 - 06:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Still no leaks(crosses fingers). Till then anyone know a good source for rebuild parts?
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