https://advrider.com/f/threads/gasgas-pro-5th-gear.1364300/
I was being kind in this thread. I have not replaced a comeplete Pro transmission since 2013 and that was on a 6 month old bike.
Things don`t always work smoothly on new bikes. I had a brand new `95 Fantic Section that would not shift up at all. Ended up splitting the engine. The shift fork had a blue heat mark in it. Nothing found other wise. Replaced the shift fork since the importer supplied a new one. The bike never had another issue. Things happen.
I just got back from jet skiing for a week. Nobody has a reply? The early SHercos would spin the mains in the case. I would do a complete tear down.
The fix is ti peen the bearing location on the cases to get it to hold.
You do not have enough free play and when it heats up it starts slipping. You obviously have the levrs stopped from going back out.
If you have small hands you can slightly grind down the end of the push pins.
Oh you got lucky as we will never, ever own a Sherco ever again. The Trs are fine, the newer the better. The Beta is a better clubman bike over most brands.
You are wrong in your previous post, the washer goes below the seal. There is supposed to be a clip between the seals which hold the seal into the leg. It is like that on any fork made.