Have run since new on High detergent diesel oil (was told warranty would not be honored if used).
Still original engine.
Following repairs as followed
1. Left cylinder head gasket (leaking coolant) 320,000 miles
2. Clutch 3 times (removed buffer plate and added 1 metal and 2 friction to clutch pack)
3. Throttle cable (pull type) 140,000 miles (push type 150,000 160,000 ????
4. Oil and filter change every 2500 miles
5. Air filter every 10,000 miles approx.
6. Differential gear oil change every year
7. Timing belts every 40,000 miles
8. Averaged miles for tire changes 8,000 on rear and 12,000 on front
9. Set point gap,set timing and change plugs every 6,000 approx
10. Tighten spokes and true rims every 25,000 miles
11. Secondary oil pump (clutch) 430,000 miles
12. Carb rebuild every 200,000 approx
13. Steering head bearings 400,000 miles
Modifications done since new
1. Converted to single carb set up around 500,000 miles
2. Replaced steering head ball bearings to tapered bearings ???? milage
Use to average 40,000 to 45,000 miles per year traveling around US,Mexico and Canada have been as far south as Belize.
Had accident ten years ago damaging spine 3,4,5 . now limited to trips of no more than 400 to 500 miles (back pain to much to endure after 500 miles) Find Hotel with hot tub with liquor store nearby.
Forgot to mention changing wheel bearings every 50,000 miles approx.
Engine main case never opened has original main and rod bearings.