2010 1198S Slow Turning Over Issue

ThatOne1198 said:

I have an 1198 engine that is struggling to turn over when the starter is hit. I have a video of the issue and what it looks/sounds like. The battery is fully charged during the test shown in video and the bike also has upgraded cables that were already on the bike when the issue started. Pulled the engine all the way out to fix a wobbling starter reduction gear we believed may have been causing the issue as well as having the starter itself rebuilt. The video is after both fixes were made but obviously did not solve the issue. Obviously I don't have the harness or ECU connected but this is the same issue it was having with everything connected. With so little left on the engine I am at a loss of what else to check or look for. Any suggestions or ideas would be appreciated, also the engine can be turned over by hand(with difficulty) and feels smooth enough that it shouldn't be the issue I don't believe. Here is the link for the video of the issue:

Thanks in advance for any help!

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baggerman said:

It's not clear how you're turning the engine over by hand. By turning it at the crank itself? If you pull the plugs and turn it over by hand with a socket on the crank nut and it's hard to do the motor has probably spalled one of the main bearings. This was a real common problem on the 1098's due to the factory assembling the crank bearings with excessive preload.

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