adjustable height seat slipping

[tony811976]

anyone been riding your gp3 and all of a sudden you have grown 6 inches or your bike has shrunk?

the adjustment under the seat slides up and down on mine(just a long slot) mine keeps moving when riding

i recently bought a gp3 rep air cooled frame off eBay to build another bike. on this frame it has loads of holes drilled instead of a slot. the seat part can(top part of the frame) be removed and fitted on your gp3 reverse.
slightly less adjustment but much safer if yours slips when riding

[bmk]

Hello Tony.
Never experienced anything like you describe but the seat pad does come off a lot.
In the end i fastened it to the seat unit with self tappers. ;D