May 18, 201412 yr Just finished restoring my Montesa MH200 (new 2nd oversize piston, rebore, plug, oil, cables, kick start spring etc) Bike will start fairly easy on the choke, but doesn't want to idle. It has the MK2 Amal concentric carb. Does anyone know how to set up idle adjustment on this carb, as it doesn't appear to have an adjusting screw. Also, the revs don't drop off as quickly as they should when throttle is closed. Could this be connected? Any help much appreciated!
May 18, 201412 yr Author No I didn't actually.Though I had a hunch it might be jet related. Bikes been sitting for years without running, so looks like a carb overhaul is on the cards. I know the amalcarb.co.uk site do a great stripdown/rebuild article for the MK1 concentric, but nothing like it for the MK2 that I can see. They also do an overhaul kit, which I'll probably get next. Anyone got any links to parts diagram, rebuild info, jet specs etc?
May 18, 201412 yr give it a good clean/blow out remove all jets and mixture screw ,which adjusts the opposite to which you would think ,there is an idle adjuster , and look into fuel bowl holes for a small jet
May 18, 201412 yr Author Thanks Total shell. Just what i wanted! Zerorev3rev4 - When you say there is an idle adjuster, do you mean the pilot screw? And where is the mixture screw? Sorry my carb knowledge is pretty basic! Great forum btw.
May 18, 201412 yr from memory i think the screws are on the left ,the mixture (pilot circuit is at the front ) and idle in the middle under slide but rather than screwed straight in its at an angle so you have to get down and look up in the hole
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