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Carbutor vacuum leak or fuel mixture issue (Read 95 times)

John C

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Carbutor vacuum leak or fuel mixture issue
07/18/12 at 09:42:15

I did the spacer mod to my bike, got everything back together. screwed the fuel mixture screw in all the way, backed it out 2 3/4 turn. Idles well. My problem now is that unless I give it a "goose", when I just gradually accelerate (with clutch in), it is acting like it wants more gas...almost like its going to on me. Is that an issue where the carb isn't seated into the boots correctly, or is it a fuel mixture issue (or something else)?

Thanks in advance to all.

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« Last Edit: 07/18/12 at 11:34:17 by verslagen1 »

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verslagen1 YaBB Moderator ModSquad Online Where there's a will, I want to be in it. Posts: 28884 L.A. California Gender:	Re: Carbutor vacuum leak or fuel mixture issue Reply #1 - 07/18/12 at 11:28:40 sounds like you didn't get the carb back together correctly. rinse, lather, repeat.
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Routy Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2280 Winston Oregon Gender:	Re: Carbutor vacuum leak or fuel mixture issue Reply #2 - 07/18/12 at 15:22:38 Quote: I did the spacer mod to my bike, ----------------------------------------- Why ? Did you have a good reason ? What did it run like before ?
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John YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 32	Re: Carbutor vacuum leak or fuel mixture issue Reply #3 - 07/18/12 at 18:22:36 Routy, It backfired quite a bit when decelerating and downshifting. It is my understanding that the "spacer mod" would fix that. Now I have other problems.... Thoughts?
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Carbutor vacuum leak or fuel mixture issue Reply #4 - 07/19/12 at 02:35:47 Sticking slide?
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Routy

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Re: Carbutor vacuum leak or fuel mixture issue
Reply #5 - 07/19/12 at 08:13:41

John wrote on 07/18/12 at 18:22:36:

Routy,

It backfired quite a bit when decelerating and downshifting. It is my understanding that the "spacer mod" would fix that. Now I have other problems....

Thoughts?

Despite what you mite have read here, IMO, there is no fix for backfiring on decel or shutdown,....not that it can't be lessened a bit by the air and throttle stop adjustment on the carb. Many here have hacked carbs strictly to try to stop the backfiring, and many have not only failed, but ended up w/ more problems than just backfiring.

I did the spacer mod on mine only because I has a lean (surging) condition in the low to midrange throttle position,.....and it fixed that near perfectly. If you didn't have any problem in that range, you are possibly running rich there now, which may or may not be causing a problem now.
I can assure you that the mod didn't change the backfiring one bit, nor did I expect it would. And I have read of some that did the spacer mod, then reversed it back later.

Rich
'07 S40 Blvd stocker, except drilled OEM exhaust and white spacer mod...1/2 (.055)

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Arnold Serious Thumper Offline The dude abides... Posts: 896 Westchester, NY Gender:	Re: Carbutor vacuum leak or fuel mixture issue Reply #6 - 07/19/12 at 09:04:34 Time to look at the plug...
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