back firing through the carb

[churcott69]

Hi i have a 2004 pitbull i have had a few occations where i was riding down the road and when i slow down to a idel the bike has quit. so i pulled off the road and it would not start just turn over and over i tried choking and all but nothing. i let it sit for a while and it fires right up and then i road about 50 miles no problems and again today i choked it let it warm up for a bit took choke off and it was ideling a little low sounded like it was going to stall so turned idel up a tad was getting ready to take off it back fired throught the carb alittle smoke came out the air cleaner and same thing would not start just turned over. waited a while and fired up? very flustrating it acts like its flooded? any help would be great. Thank you also i am new and this is my first bike a little rough ridding but i love it. i am hooked

 

[Brew]

You might want to check your fuel cap. It might not be venting (On too tight)! Loosen it a bit and try riding and see if that solves your issue...

 

[Little-Boo]

Hi i have a 2004 pitbull i have had a few occations where i was riding down the road and when i slow down to a idel the bike has quit. so i pulled off the road and it would not start just turn over and over i tried choking and all but nothing. i let it sit for a while and it fires right up and then i road about 50 miles no problems and again today i choked it let it warm up for a bit took choke off and it was ideling a little low sounded like it was going to stall so turned idel up a tad was getting ready to take off it back fired throught the carb alittle smoke came out the air cleaner and same thing would not start just turned over. waited a while and fired up? very flustrating it acts like its flooded? any help would be great. Thank you also i am new and this is my first bike a little rough ridding but i love it. i am hooked

It acts like it is flooded because it probably is. Stop using the fuel enrichner or choke as you called it. If it dies when you let off the throttle, try turning up the idle a little. The idle should be set at about 1000 rpms. This is not a car, the dog will not idle good at 700 rpms.

Carlos

 

[HMAN]

Might be a good time to clean out and adjust your carb.?....:zz2cents:

 

[francoblay1]

It acts like it is flooded because it probably is. Stop using the fuel enrichner or choke as you called it. If it dies when you let off the throttle, try turning up the idle a little. The idle should be set at about 1000 rpms. This is not a car, the dog will not idle good at 700 rpms.

Carlos

Yup!!! :2thumbs:

 

[Hillsidecycle.com]

I'd lean in the direction of bumping the pilot jet 1 size, re-set the air idle.:flag:
Scott

 

[francoblay1]

Here you go Bro... also in youtube is a good video about it.

S&S Cycle | Carb Quick Guide

 

[woodbutcher]

also, pull the plugs and check them. the enricher has probably fouled them.

 

[Peckerwood]

Hate to tell you this, but when you get finished checking the entire fuel feeding system (like I did a month ago) and you find nothing amiss, start looking at your ignition system. My '04 mastiff was acting EXACTLY like you describe yours, backfiring, low idle, stalling and hard to restart, etc. It's your EHC. If you lack the proper diagnostic tools, take it to your mechanic, bite the bullet, and save yourself the downtime at the end of the riding season.

 

[Fibersnake]

Lots of good advice already, but also woould start with checking the fuel cap first. Some of the models (and most likely yours) have an insert in the cap that if for emmisions and it is a white vernt plug. If you have such, pull it out (comes on-screwed) for those sometimes would stop function right and starve the fuel supply. Then get some spray brake cleaner and spray the underside of the gas cap real good to make sure the little vent hole is not clogged up.


Go ahead and change the spark plugs to makes sure you have good ones in that are not sooted over from possible to rich of mixture due to use of enricher.

Next when starting the bike, do not use the enricher unless it is very cold and thenb just enough to get her to fire up, then gently use the throttle with out the3 enricher on until she isw warmed up. Also then set the idle speed to 1000 RPM, anything less can created problems. These as mentioned by other are designed for 1000 RPM idle and not less.

Get her warmed up and then take her for a ride and see what happens. If the problems return, ready the DIY on adjusting the carb as well as the S&S instructions and see if you need to re-jet.

If you go through all these steps and still have issues, then start looking into the electrical with checking the Volt Regulator first to make sure that it is not failing once it gets heated up. Go from there to the next area. Could be the worse of an EHC acting up, however more than likely it something so much simplier.

Good luck

 

[Th3InfamousI]

My 04 Rigid was doing EXACTLY the same thing as what you have described. It would start up and then after a few minutes just die. When I was riding down the road it would backfire excessively and sometimes at a stop light would die. I was able to catch it from dying by twisting the throttle. This led me to believe it wasn't an electrical issue as i would assume if it was electrical it would just die regardless of the amount of throttle I apply.

I went ahead and pulled out the vent piece on the fuel cap, I took it for a ride and experienced the same issue. I then went ahead and threw in some new plugs, and fortunately have not experienced it again. **FINGERS CROSSED**

Just out of curiosity where do you live? I seemed to experience this during the summer months of excessive heat here in Texas. I still wonder if it was because it was so hot. My garage has no AC so it was probably 110-120 for 15+ hrs a day that the gas cap being plastic expanded and would not let it breath.

 

[Mickeetwo]

All good advice.....I would start simple first. (1)Check gas cap vent (2) New plugs (3) DO NOT use enricher when starting. Just three twist of throttle and then start. These first 3 ideas will cost very little and are easy to do. If the first three don't fix it move on to the others advice. Hope you find the problem

 

[churcott69]

Thank you all so much, I Talked to Kirk at forest cycle works in Michigan where i live by flint, Today he told me to pull the seat look at light on the box when cranking over should blink then when starts should stay almost solid. if it quites then turn it over and see if light blinks. so i did and it quit just as i was getting ready to take off. So now the news as i cranked it no light blinked so narrowed it down to electical could be as easy as a ground or something but my case probably more, i will take it to him Saturday and let you know what he comes up with but great advice and i want to thank all of you for taking the time to help a beginner out some day i hope to give back...

 

[churcott69]

well it ended up being the cam sensor 150.00 parts plus labor thanks Kirk at Forest Cycle Works in Flint MI. Also thank you all for the advice i really owe you all

 

[Peckerwood]

Thanks for the update, I've been watching for it; wanted to see if your problem was the same as mine (EHC). When my issues started with the mastiff, we did the cam sensor first, and I got about 100 good miles out of it before the EHC failed. Hope you have better luck than I did. If you encounter further problems, let me know; there is a relatively inexpensive fix available.

 

[Th3InfamousI]

well it ended up being the cam sensor 150.00 parts plus labor thanks Kirk at Forest Cycle Works in Flint MI. Also thank you all for the advice i really owe you all

Awesome I appreciate the response. Something that I may need to look into, this could explain why it stalls at red lights but if I rev'd it it would not die!

Thank you SIR!:up:

 

[churcott69]

Thank you i hope it solved the problem. i will let you know. Please let me know your fix just incase. Thanks again