If I buy a service kit for my Amal 375 carb, what value jets should I select?
Check your c15 owners manual or workshop manual , or speak to Burlen salisbury
The usual jets to wear are the needle jet and its needle - I'm not referring to the float needle , but the main needle and its corresponding jet.
A lifetime of use let's the needle waggle back and forth in its needle jet , making it oval.this will not cure any leak , only a bad mixture at that part of the throttle
Mine leaked or weeded from where the bottom jet block screwed up into the main body, even a new 2asher didn't cure it completely until I cleaned both faces up
Pretty sure I flashed up standard settings in your other thread?