Originally Posted by
troie
1. Buy new fork. Remove old fork. Install new fork.
2. No. The main differences are 1 1/8" or 1.5" steerer tube diameters. I doubt the 800 is a 1.5.
3. If it doesnt fit, you cant make it.
2/5 isn't bad
1. Make sure fork does not upset geometry. I doubt it
2. The 1.5" headtubes are primarily in freeride and downhill bikes. Older bikes generally have either a 1 1/8" or a 1" headtube diameter
3. If the headtube is larger than the steerer tube, you can get a reducer headset