Loud pop on startup - 02 VStar 1100 - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
 
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post #1 of 4 (permalink) Old 11-22-2010, 11:22 AM Thread Starter
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Loud pop on startup - 02 VStar 1100

This is my first street bike so I am learning where I can.

2002 V Star 1100 with 38K Miles. Baffles removed from pipes.

When starting the bike in the morning it will release a loud pop on the first crank. The backfire sound is as loud as a gunshot. It does not seem to matter if the choke is on or off, I cant seem to determine what causes it. It happens about 75% of the time on the first startup.

Also of note, the bike does a bit of backfiring while riding when I decelerate.

I have not gotten into the mechanics on the bike other than changing the oil, replacing the tires and rear shock. Any information would be appreciated.
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post #2 of 4 (permalink) Old 11-22-2010, 11:27 AM
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Believe it or not, this sounds "normal" The lack of baffles is a major contributor to this popping. During start-up I think the 1100 has a compression release so it will push some unburnt fuel/air mixture into the exhaust. With or without baffles, it happens, but without baffles, it also affects your neighbors piece and quiet.



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post #3 of 4 (permalink) Old 11-22-2010, 03:53 PM
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My 650 sounded like a 22 rifle for the first time yesterday when I fist cranked it.. It ran good so I'm not worried.
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post #4 of 4 (permalink) Old 11-22-2010, 05:00 PM
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my baffle-less 02 1100 does this from time to time too. seems harmless

Lowering the tone since 1969
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