What do the plugs look like? Also, some Monoblocs are machined not to have a fibre washer below the ticklers
It's not the ticklers. Original monoblocs did not have a washer under the fuel inlet which is the seat for the needle valve. Amal now supply shims to put between the inlet and float chamber so that fuel level can be adjusted. How do I know? I have new and original monoblocs and spotted the difference when I was rebuilding the bike some years ago so queried it with Burlen.
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