Re: my WD M20 carburettor and possible blocking of pilot jet. Advice valued
Thank you both for further advice and clarification. Now at last i think i understand how to remove the jets - pushing them out rather than unscrewing them. I haven't tried to remove them as I think the jets are clear and the engine now seems to be running much more regularly at low speed, so my next plan is to go for a run and see if how it runs in the shed is how it will stay running out over a distance. I am crossing my fingers. Sincere thanks for your really helpful feedback. peter
Re: my WD M20 carburettor and possible blocking of pilot jet. Advice valued
The upper half of the jetblock is very easily damaged/distorted and lots of them are.....especially if the carb has a larger bore, like the M21, here the top only stands on 2 very thin brass legs.
To tap out the jetblock without putting force on the top half I made this very simple tool from a spoke and a piece of aluminum.
Re: my WD M20 carburettor and possible blocking of pilot jet. Advice valued
Got it, thanks Ron, that at least is one mistake i won't be making now!! I feel a lot more confident about this now and if things don't go well with riding then i will try taking out the jets. I found getting the block out, with care and balsa wood and hammer - and then putting it back, straightforward. thankfully.
it is great to have this website and all the knowledge that goes with it. with thanks again and all best peter