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Engine sound and temperature

Posted: Fri Mar 02, 2012 4:44 pm
by MWPMWP
Okay, so I've got a 2009 Buddy 125 that I purchased new last year. I'm up to about 1300 miles and I'm curious about a few things.

The first is the sound of the engine. I may be imagining it, but it seems like it's getting a deeper sound than it used to have. It's running smoothly and I'm still getting great gas mileage....about 86mpg. Is this just normal with breaking in the engine?

I also have a question about engine temperature and exhaust smell. I've done the oil and gear change maintenance, but I wanted to know just how hot the engine should be getting. My rides have only been for about 20 to 30 minutes at a time, but it always seems like the engine throws off more heat than it should when I'm done riding.

I also know every engine has exhaust, but would excess exhaust smell indicate the engine burning too much gas? It's not a cloud or overpowering by any means, but just wondering. Thanks to anyone who replies. Overall, I've had no problems, so I guess I'm just curious about normal conditions.

Posted: Fri Mar 02, 2012 5:37 pm
by Tocsik
You may want to pull your spark plug and take a look at it. It should be a light mocha color. If you are smelling a strong exhaust odor, it may be running rich. Does it smell like gas, oil or burning carbon?
How is your top speed?
Any "popping" or backfiring on deceleration?

Posted: Fri Mar 02, 2012 6:00 pm
by PeteH
Your mileage is just about at "Buddy Puberty". Most of the 125/150s get a bit of performance boost around this point, as break-in is well-established. I noticed a change in the exhaust note as well.

Posted: Fri Mar 02, 2012 6:38 pm
by Raiderfn311
All of the above.

Posted: Fri Mar 02, 2012 8:33 pm
by Tee Jay
Check the exhaust system nuts. Both the heat and the possible volume increase are symptoms of loose nuts. I've had it happen and it sounds like a Harley.

Posted: Fri Mar 02, 2012 10:42 pm
by Raiderfn311
Tee Jay wrote:Check the exhaust system nuts. Both the heat and the possible volume increase are symptoms of loose nuts. I've had it happen and it sounds like a Harley.
Well if the scooter is walking funny I think you hit the, uh, nail on the head.