Originally Posted by buls4evr
It is a 1980 MX bike so will not be too fun for trail riding. It has large ports. They vibrate a lot and suck fuel like mad. They are sudden. Not exactly a good recipe for trails. The tank is not original. Probably came with a 2 gallon tank or so. Without a GS type cylinder and a lot of flywheel added & smaller carb it would be a handful. Likely why it was parked to begin with as much as needing a ring job. I would just make a crosser out of it as this is the cheaper way to go and follows the original intent of the bike anyway.
Have you ridden one? I raced and trailrode one for years,they are as smooth as could be desired.
And fast enough.
KTM sells 7 different thickness base gaskets to tune the engine for what you want to do with it. I dont know if those are still available but I detuned my 495 a little with thicker base gaskets.
I also had a 77.5 250 GP model for years,flattracked it,trail rode it,MX'd it,then scrambles raced it,then rode some enduros with the same bike.
It never broke and it won some races.