September 20, 20214 yr Author 8 hours ago, zippy said: this video shows the new style crank bearing (w/ seals) and how to retro fit to older Pro engines. more videos; https://www.youtube.com/c/TRIALSPARTSUSA/videos there used to be a good video by Jim of tearing down a GasGas pro engine, I am unable to locate at this time good resource for parts diagragms https://www.thehellteam.com/technical-support/gas-gas-parts-and-service-manuals.html click parts books and find your year. Thanks very much @zippy!
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