As the title states, starter clutch on my Gen3 came apart yesterday. Just got it back together and was doing some checks before taking it to the dyno. Had started it up a several times to check for leaks, bleed coolant system, adjust CCT, etc. After installing the chain, plastics and some other things I went to fire it up to put it on the truck. Started to turn over and then there was a loud clunk. Tried it again with the same result. Third time I tried bumping it, it just sounded like the starter was spinning and not engaging with anything. Pulled the side covers off to find this...
The starter clutch case had several cracks allowing the one way clutch to spin without turning the motor over. Anyone have any idea what would cause this besides it just being a POS part? :dontknow: Talked to the local wrench/machinist and he said he had never encountered it on any newer jap bikes and it just looked like a material failure. Didn't know if it could have been due to something like the cam chain being too tight or bolt being overtightened, but I'm 99% sure neither of those was the case. Motor still turns over fine by hand so that makes me feel a little better.


The starter clutch case had several cracks allowing the one way clutch to spin without turning the motor over. Anyone have any idea what would cause this besides it just being a POS part? :dontknow: Talked to the local wrench/machinist and he said he had never encountered it on any newer jap bikes and it just looked like a material failure. Didn't know if it could have been due to something like the cam chain being too tight or bolt being overtightened, but I'm 99% sure neither of those was the case. Motor still turns over fine by hand so that makes me feel a little better.