slight backfiring thru the exhaust

Just wondering if anyone out there has experienced slight popping thru the exhaust when letting off the throttle. When at highway speed, sometimes, not always, when I let off the throttle I will hear this happening. I was wondering if there is something I can check or adjust to eliminate it short of buying a $300.00 device to custom adjust my fuel injection system. The Wing drives out nice with no hesitation. I checked the air cleaner a week ago and it is fine. The bike only has a little over 4,000 miles on it. It is a 2007 model. Thanks in Advance for any input you may have. Old Hickory

Sounds like it back pressure burning some unburnt gas .2 cylinder motorcycle engine's are known to do a popping sound when the drive train decompress the motor with throttle close. Don't touch the fuel system they are factory set .If your mpg is good leave it alone.

Sounds good to me, thanks for your advice. I expect a little popping and farting from my Harley but I didn't think it was possible with the Wing. Old Hickory

I would also check the fuel rating you are putting in, i seem to recall someone having the same thing happen with the mixtures of fuel you can buy in the USA, Methanol, or some such thing.

I use non-ethylene gas in my Wing. You would think that would be the best for it. OH

My SWing does this, too. I always assumed it was the "Flex Fuel". It's an occasional thing for mine, and it runs fine otherwise.

It's not eay to find non-ethylene gas in our area. I was considering buying some of the cans of it at Sears (they sell it for lawn mowers, yard tools, etc).

Now, maybe I'll skip it.