Good Evening All,

I just bought a 2008 Dyna Street Bob and had it for a few weeks now. The Dyna was a one owner and only had 4100 miles. I rode it home approximately 100 miles and had no problems. I've rode it around town and didnt have any problems until today. I noticed the bike seems to have a popping sound sort of like a backfire from the exhaust while im taking off or while riding.

It does it occasionally not everytime I take off. When it did today it was while i was shifting. Once I got to 4th or 5th the bike lost power and popped then accelerating the bike. It then happened again as I was riding and was on 6th gear. This time it popped a few times, i accelerated the throttle and was fine. When i released the throttle because i was getting to a stop sign the bike shut down.

I started the bike back up just fine. I took off just fine and once again while riding in constant speed it backfired again causing the bike to accelerate then shutting down once again. This time i actually started the bike while riding.

The bike does have Vance and Hines short shot headers. I dont know if that is affecting the performance. I know the previous owner didnt ride it that much. I believe the last time he rode it was 5 or 6 months ago.

I need some help anyone know why this could be happening?

Thanks

 

Does the bike have any sort of fuel management system be it from the dealer (sepst, etc), V&H Fuelpak, Power Commander, etc?

 

Have you put gas in it? If the previous owner didn't ride much, you could just have bad gas. Always start with simple first.

 

Maybe throw some Sea Foam in with that new gas. Miracle working stuff.

 

Yeah may just need re mapped since its got exhaust now and possibly a air intake

 

Thank you all for the responses. I honestly didn't ask if it does have a fuel management system such as a fuelpak etc... I will look to see. Also, I did think of the gas since it was sitting there for a while. I have filled tank only twice since I bought the bike so not much riding either. I will definitely look into the sea foam stuff mentioned. Someone also advised I may look into the coil for a bad connection and the fuel pump relay. What are your guys thoughts on that? Also if it doesn't have a fuelpak or if it does. Would it be recommended I do install one or get it remapped in the event it does have one?

Thanks

 

Get fuelpak if it doesn't have one, drain and replace fuel, fit new spark plugs, get back to us.

 

I'd say if its V&H and no fuel management, that could be the issue. If there's an exhaust flapper valve, that can cause some weird notes if its not been disabled.

 

If you've put gas in it twice I'd forget about that. My biggest question now is if its throwing any codes, does the light come on? And yes, check for fuel management and let us know.

 

Guess it was a simple gas fix then huh?