I've got an 83 Yamaha Maxim 750cc. It doesn't slip per say, but it pops out of first gear and back into neutral on its own. It only does this from first gear, and it happens more frequently as the engine warms up. What could cause it? I Haven't checked the clutch cable to see if it's loose, but the stall test is fine. I'm at a loss


Usually, when a transmission pops out of gear it's because a shift fork is bent inside the transmission. The shift fork is what moves the synchro up and down the gear, and if it becomes bent for whatever reason, it will slip out of gear.

Updated on April 3, 2018

Original Article:

Most Common Reasons Why a Transmission Slips
By Eddie Carrara

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