Re: Need Help: Gear box problem -bike shifts to neutral on going over 4000 RPM
It's not the teeth that wear.
The gears have "dogs" that lock them to an adjacent gear to drive the shaft.
The dogs become rounded and no longer stay locked together under load.
It's nothing to do with wheelies, just bad shifting. It's most common on second because first to second is the widest shift and slams in the hardest. The lower gears also see higher revs and are used a lot more often than the higher gears.
Does it happen regardless of whether you've shifted up or down to second?
If you shift to second but don't release the shift lever (normal pressure - don't force the lever) does it stay in second while you hold it in?
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