gemini

red hot water, goes on easy and doesnt move once its cooled

Even when warmed up the air screw has no effect when turning in (even closed) . this is due to the pilot jet size, float height wont affect it, but main jet size does slightly, better to start of with the standard jets and go from there

shame you didnt reply to none of my pm's, i was going to bring you a carb to try as its nothing to do with the electrics

good link, thanks

just take the cover off and have a look, the electric start 125 does have one, yours may not

easiest way is to take the head off and use a feeler gauge and a straight edge, this is the only way to get an accurate reading as the piston is domed on top and the plug is on one side, the advance should be held open when you set the points, a cotter pin spread apart works well to hold it open

not sure if Cynic forgot the link but its here http://www.vehicle-wiring-products.eu/VWP-onlinestore/home/homepage.php

http://www.yamahamotorcyclespares.co.uk/spares/partImage.asp?GPN=Z%3AO%5D68%3A%3D%3B5555&uid=0

the bike will start while on the stand, it will cut out if you put it in gear while the stand is down

mixture screw is here, there should be a black rubber bung covering it

did you do a compression check on both cylinders before you stripped it

have a look here http://www.yamahamotorcyclespares.co.uk/spares/epc2.asp?ModelID=9738&pageID=3&m=YAMAHA+XVS125+2002+CRANKSHAFT%2E+PISTON&uid=0

you will need a 17.5 pilot jet, the standard one is a 15

could be just overtight

slick 50 was made for worn engines