2
So I had some spare time and a motor laying around. Next thing I know I have spent a bit too much on a 30 yr old motor. The bottom end has been thoroughly checked out and is in good shape. All the upgrades were in the top end.
XR's Only did the following:
Timing chain
Web Cams trail grind hard surface cam
Hard surface rockers
Kibblewhite Stainless valves
Kibblewhite hi-po valve springs w titanium retainers
Jug was overbored 3mm
Extended cooling fins welded onto the jug (custom, never been done by them before)
Extended fins welded onto the head
Trail port job
Ceramic coating of the combustion chamber, back of the exhaust valves and inside the exhaust ports