[Kershaw]

In fairness to Doherty, My engine in 2000 sent a rocker clip up into the oil pump and broke a camshaft, and he repaired that for free for me, as he didnt put any gauze on the pickup.
I still standby me earlier comment that there is no/very very little difference in the 2 engines. Its just that Heavey puts as much effort into his engines, and they cost exactly half... after all it is a 'low cost' formula