Bacfiring question ?
Posted April 28, 2003 - 03:19 PM
The bike was superb except for one thing . While riding (first gear plowing) in a knee deep mud section for a while (20 min or so), I felt the bike backfiring slightly a few times. As soon as I got the chance I stopped to cool me and the bike .
I assume that the backfiring was due to the overheating of the beast and/or a faulty jetting condition.
I'd like to have your suggestions on that.
The bike is stock except for the snorkel removed and a Unifilter in place. I normally have 0 problems. It stars normally first or second kick.
Once rested I resume riding and everything went fine.
If you want to see pictures of what is done here, the adress is next :
Posted April 28, 2003 - 04:47 PM
Posted April 29, 2003 - 03:10 AM
I will re-route the carb vent hoses to the air box. This should take care of any plugging if this was the cause .
But to tell you the truth, I was so busy trying to keep going in that Knee deep sh*t , that you are right to question me about backfiring/bogging down/popping .
I was barely cracking the throttle in first and the engine seemed to want to kickback every now and then .
That's why I tought I was experiencing backirings. At one point I was concern of breaking or burning valves, but the misfunction didn't last long. And as I said, after a few minutes of cool down, everything seemed to be OK.
Your inputs are appreciated.
Thanks to all TT members
Posted April 29, 2003 - 03:34 AM
Where did you guys do your ride,how far was it from the Ontaio border? I'm always looking for new places to ride.
Does your local club have a web page?
Posted April 29, 2003 - 05:58 AM
The ride was one of the FMSQ, probably near Montréal (St Michel des Saints ).
Hey Sylvain, I had backfiring problems when the engine was hot ( we talked about that already) and just wanted to mention that following my ride of the last week end, I can confirm that I got rid of the problem with a 175 main jet over the 165. The engine was sure very hot trying to follow my buddy's XR650R in open trails . I know you mentioned the jeting is supposed to be OK but are you still running the stock 165mj?
Posted April 29, 2003 - 09:09 AM
Posted April 29, 2003 - 03:19 PM
I can tell you that this was a very great ride . Muddy but great.
To answer your question, yes I'm still running the stock jetting. And I'll get a 175 main jet and see how it turns out. Thanks for the tips .
One thing I forgot to mention, the elevation at which the ride took place is about 1500 feet. Do you think it could of had an ill effect on the jetting ? Made it leaner or richer ?
Should the dealer have this 175 mj in stock?
Did you install the main jet yourself ? I'll study the manual tonight to see the procedure.
Well done guys. With this feedback, it's much easier to fine tune our bikes.