I have an '07 V-Star 1100 with 9700 mi.that has developed an oil leak that is coming from the rear cylinder exhaust pipe at the pipe seam. The engine starts and then begins to smoke from the exhaust. It then begins to miss and pop as if the oil is in the cylinder. The oil leak at the seam is pretty severe. With the engine miss the bike is not rideable. Valve stem seal or broken cylinder ring?
Hard call ! compression test , but sounds like your going to get your hand dirty ! P...
SOURCE: engine sound and oil leak
crank main bearing sounds like its gone and oil seal gone i had same problem needs imidiate rebuild before more damage ocures looking at an expensive job
SOURCE: 2007 650 yamaha vstar popping through the rear cylinder exhaust
First off did you buy it new? Second has it gone through its break in tune up yet?Did you do the re jeting? My guess is it was re jeted wrong & neeeds to be re jeted again or could also need more air(upgraded air kit) or a tfi or power comand fuel mod.My bike also poped untill I did the air & fuel upgrades & them upgrades will also give you a much needed house power needed for this rig.
Bring it to a shop & have it looked at.......
Good luck
SOURCE: white smoke blowing out the exhaust and oil consumtion on r.cyl.
Its most likely your rings. They get worn and start letting oil into the combustion chamber. They aren't extremely hard to replace.
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