Pilot jet size - 1958 500 VH

[Alistair F]

Quick question - what size pilot jet is standard for the 376 Monobloc fitted to my 1958 500VH ?
No information in the printed owners guide that I have.

[cmfalco]

An Amal book shows a #30 pilot in a 1-1/16" 376 Monobloc for a 1955-59 VH.

[Alistair F]

Thanks very much cmfalco - useful information!

[nadab_sardar]

Worth knowing that on these old Monoblocs a poor idle is more often a gummed-up pilot jet or a tired slide than the wrong size. If you find the jet in there isn't a #30, I'd still fit a clean #30 and set the pilot air screw before trying anything bigger or smaller. Around 1.5 turns out from lightly seated is a normal starting point, then tweak it for the best idle. Also check for air leaks at the manifold joint, as they can fool you into chasing jet sizes.