Problems with backfiring.

[bigd1960]

so I was all ready to go for a ride and when I started the beast i had heavy backfiring and it sounded like crap when I cranked throttle. Also have smoke coming out of breather when it dies. Went for a short ride and if I open the throttle it backfires like crazy and hardly has any power. Any suggestions?

 

[Th3InfamousI]

Check the black vacuum plug on top of the carb. If it's cracked or gone missing it will cause this

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[bigd1960]

Check the black vacuum plug on top of the carb. If it's cracked or gone missing it will cause this

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thanks will do that right away

 

[bigd1960]

thanks will do that right away

looks like it is cracked but not 100% positive (eyes are not working the way they used to). Can I buy a plug at HD dealership?

 

[MossBerg590]

I think you can use a rubber vacuum plug from auto parts store if you have any around

 

[Th3InfamousI]

looks like it is cracked but not 100% positive (eyes are not working the way they used to). Can I buy a plug at HD dealership?

Just go to the auto parts store and pick up a vacuum cap. Bring the old one and get one to fit! Should cost all of $1.

Now this might not fix it. I was just suggesting to check the cap because if it leaking it will cause all of that and it's the easiest and best first step. If a new cap doesn't fix it, might be time to clean the carb.



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[MossBerg590]

Also sounds like the carb may be flooding. Try adjusting using the ss guide and if that, the cap and fresh gas doesnt fix it I would then clean carb like eric said. Float may be sticking

 

[bigd1960]

Thanks

 

[bigd1960]

The cap is broken. Run to town and go get one. Now probably sound like a stupid question but how do I clean the carb? Can't find a thread on it

 

[HMAN]

The cap is broken. Run to town and go get one. Now probably sound like a stupid question but how do I clean the carb? Can't find a thread on it

Simple. 1st, turn off the gas and drain the fuel line. There are 4 screws "under" the carb that hold the bowl on. Remove those(1st remove the drain on the bowl to empty it) screws and the bowl will drop down and off. Be careful of the blue o ring. Download the S&S Carb guide to help you visulize. Clean out the gunk and check the float and needle while your in there. This is a good time to see what size jets your running as well. Unscrew them and clean also. Someone else will pick up what I missed....

 

[bigd1960]

Thank you for the help. Changed the vacuum plug and cleaned the bowl and float assembly. No more backfiring but now my Speedometer quit on me. Tach works but no reading for speed. Have a new Dakota and Doc Esc. Guess I'll have to check my connections and make sure all is good.

 

[Th3InfamousI]

Thank you for the help. Changed the vacuum plug and cleaned the bowl and float assembly. No more backfiring but now my Speedometer quit on me. Tach works but no reading for speed. Have a new Dakota and Doc Esc. Guess I'll have to check my connections and make sure all is good.

Simple fixes are the best...speedo is different issue

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[MossBerg590]

Glad you got it figured out. My speedo does that ocassionally as well. Sometimes it works sometimes it doesnt. Think the speedo is bad internally as I rewired whole bike and still ocassionally does it.

 

[BWG56]

Glad you got it figured out. My speedo does that ocassionally as well. Sometimes it works sometimes it doesnt. Think the speedo is bad internally as I rewired whole bike and still ocassionally does it.

He said he has a Dakota speedo not stock , so maybe check and clean the speedo sensor. Then check wiring from module to the speedo plug for continiuty. You can check if the speedo sensor is working by taking the bike for a ride and see if the turn signals self cancel or not.

 

[bigd1960]

Glad you got it figured out. My speedo does that ocassionally as well. Sometimes it works sometimes it doesnt. Think the speedo is bad internally as I rewired whole bike and still ocassionally does it.

Thanks for all the help. I have a tendency to overdo it on the cleaning so it is possible that I unplugged something

 

[bigd1960]

No offence but I've seen pics. Think ur in a league of ur own

 

[Th3InfamousI]

what's that mean lol

Means you clean yours more than him..he actually rides it ..lol

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[Brew]

I can't believe how clean those bikes are. I just don't keep mine down long enough to clean it like some of you do.

 

[Th3InfamousI]

Just giving ya chit! 600 isn't bad for you.

Your about to hit summer and a out 3-4 months of nice weather. I'm about to hit summer and riding after noon is almost too hot.



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[Th3InfamousI]

34 and frost this morning wtf

Only 60 now, and I think the high for today is 65. Fucking freezing!

Tomorrow 81...then the mercury goes north. Hopefully ride Saturday should be nice

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