Question about 2005 Suzuki Boulevard C90
Posted by Anonymous on
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Posted on Jan 02, 2017
Hi ......... sounds like the petrol is igniting in the pipe, could be valve needs reground (carryout a compression check), leak in the exhaust system (all gaskets & joints good ?). What colour is the spark plug ? Have you recently put a new pipe, filter or re jetted the bike ?
Posted on Jan 02, 2009
backfiring means you have an air leak or a lean mixture. Look for leaks at the header pipes or perhaps a crack in the exhaust.
Cold air getting into the exhaust is usually what causes the backfire noise.
You may have a lean engine running situation but the bike would have other issues besides the backfire.
Let me know if you are having any other issues or if it just the backfire.
Posted on Jan 02, 2009
My 2007 C90t which is the same motor as yours requires 4 1/2 quarts of 10/40wt.
Stick with Suzuki brand oil btw. When I changed to Amsoil, I developed a problem.
Posted on Sep 11, 2009
My Clymer manual has good diagrams.
The 30 amp fuse that protects the charging system on my '07 C90T is located behind the left upper cover. Yours is the same.
You have to remove the steering head cover and the chrome speedometer section to get to it.
Yep. blow the fuse on a trip and you better have tools so you can get to it.
Posted on Sep 20, 2009
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