Ariel Owners Motorcycle Club

Terry, I am sorry. You can confirm your suspicion by blowing into the pickup pipe and blocking the copper pipe at the other end where it comes out of the crankcase. If you detect a leak there, I cannot think of another solution than to split the crankcase.

Hi Terry

You can do a bit more diagnosis before you gain access to the pump, do as I and others have suggested and blow up the pipe, if it passes air easily you have a leak in the system, if it passes air when you kick the bike it has a priming problem, if it doesn't pass air you have a blockage.

Highlighting where the problem may be helps in location when you dive in deeper.

Regards Mick