hi
my problem was not the oil pump, it is that lower cylinder was not firing. i thought this cylinder was firing because you could feel pressure coming from its exhaust, but it would not heat up. i have disconnected the working cylinder ht lead to see if the bike would start. it starts fine but it dies after a couple of seconds. i have swapped plugs and i have checked for spark all fine. any ideas?? i done a compression test and compression is good.[/u]