simon.holyfield wrote:Allan, not sure if anyone has mentioned this but the Mk1 has a drain from the front offside main bearing into the crankcase, for the outflow from the prv.
Happy to assist you with pictures and dimensions if necessary.
john.whiting wrote:......However ,do check before dissembling the motor to be sure the PO hasn't included an oil pressure release somewhere else.
paul.jameson wrote:To answer Nev's point, I have known of a number of bikes which have combinations of 4G/MkI/MkII cranks. None with such a combination seem to be bad on vibration and it may be that the two best bikes I have ridden from a vibration point of view both had Mk II rear cranks and Mk I front cranks.
paul.jameson wrote:Before you go drilling the Mk II crank, do get the drawing of the Mk I crank from Roger so that you know what to do.
It’s Roger Gwynn who takes care of club memberships. You likely had contact with him when you registered as a member.
john.whiting wrote: .....In any case, before pulling anything down, Id check the lube system with air pressure from a compressor and regulator and see if there is any release operative. You'd probably need a fairly large airflow to overcome other leakages and maintain pressure.
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