So I went to florida for two weeks and when I got back, I started riding the bonnie around as usual. I've taken it to work for the past 3 days since I've been back and since then when I let off the gas and start slowing down(I let the engine slow the bike down for a little bit before hopping on the clutch and brakes) I hear mild popping sounds. Tonight on my way home from work, when I was leaving the parking lot and came to a stop sign and started slowing, I heard a somewhat "loud" pop that sounded like a back fire. The poping is coming from down low. It usually sounds like it is coming from underneath the engine, but the "loud" pop I had tonight sounded like it was coming from right in front of the exhaust cans.
Whats going on here? before I left, I didn't have this problem. I initially thought it may have been a lower grade gas that I put in causing detonation, but the only time I've put 87 in was the first time and since then I make sure I put 93. i then thought it was the fact that it sat for two weeks, but that doesn't seem like it would be that big of a problem. The third thing that comes to mind as I write this is: could it be my riding style? As in going WOT in 3/4/5 gears from a slower speed causing more unburnt fuel to be going through to the exhaust?
Any thoughts?
Last edited by redbaron586 : 06-19-2008 at 02:47 AM.
It wont be your riding style, thats for sure.
The popping could be a number of things but one to check is that you have no exhaust leaks (loose connections or bolts, cracks etc).
A little bit of lean popping wont do any harm, and it'll help to get you noticed!!
You may have an exhaust leak at the header / muffler connection letting in air that is igniting causing a backfire. I'd check the whole system for leaks, but I think the poppong is kinda cool. The older Triumphs and Nortons did it as a matter of course.
Don't waste your money on the high test fuel. These bikes are designed to run on 87, and do it very well.
Question: Is your AI still connected?? If it is -that could be your problem? The valve could be malfunctioning. Still there- takeit off- problem solved!
What kind of pipes do you have? Open pipes will undoubtedly give you popping on decel and the occasional backfire. Mine pops\growls\backfires most of the time when i decel. I've come to really like it, especially after seeing some nice older bikes around town doing the same
But I've been tuned up, went from being a bit lean to a bit rich, still pops just the same. Just a part of having open pipes. If your bikes stock, i'm not sure....haven't heard too many people with stock bikes mention popping.....
A few weeks ago I had to have a new rear tyre fitted, that meant I had to remove the exhausts. At the time I thought it odd that the joints to the down pipes had some old silicon on them.
Today I've just bee giving the bike a service, carbs balance, mixture check etc. As a part of this I noticed a small amount of popping on the exhaust, no helmet on!
Checking thought I found a tiny little leak (blowing) on both the joints. Off they came and a smear of silicon on the joints and they are gas tight again and no popping
I get a nice burble when I run her up to top R's & back down. No "Pop" just a nice burble down! I also have an exhaust leak from when I had the rear tire replaced. Minor- streaks on the chrome but NO popping! Somethings not quite rite?
If indeed there are no underlining mechanical issues, enjoy the rumbles. From what I've read elsewhere, it's a normal turn of events for a well tuned bike. And like has been said, it gets you noticed.
Here's some popping on decel for ya! This is my buddy's 2001 790cc Bonnie equipped with TORs, doing a 'drive by' on a deserted road in New Mexico. This bike ran like a champ from day one, until it was sold a month or so ago, with over 25K on the odometer. This bike always got in the high 40s (47-48mpg) even loaded down for our cross country trip.
Bob
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2003 T100 (790cc) Lucifer Org and Silv: 122/42 jets, TORs, 17T, UNI filter, no AI, Polaris bellmouth, Metzeler ME880 tires, Progressive 440 shocks (105/150 springs),11-1126 fork springs, gaiters, MotoTwin low bars, 6024 lamp, htd grips, 12v outlet.
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