2 stroke carb setting

[Gsx750f boy]

Bought mz with mikuni carb fitted..idle screw was screwed right in and doesn't seen to do much ..revs low at idle until u lift slide via cable adjust in top of carb.....my question is it seems to be runner rich maybe but bloke I got bike off is running premix 40:1 rather than 50:1 it should be would that make it run rich or weak ( as in fuel quantity rather than oil )due to 40:1 ratio ????? Answers on a postcard please lol

[fastbob]

Probably run better without carb . Just rig up some sort of drip feed and will be fine Comrade .

[fastbob]

Have you assembled the tool kit yet ?

[fastbob]

Joking apart , here's a little inspiration for you . Ahh that sound brings back memories.

[skyrider]

Bought mz with mikuni carb fitted..idle screw was screwed right in and doesn't seen to do much ..revs low at idle until u lift slide via cable adjust in top of carb.....my question is it seems to be runner rich maybe but bloke I got bike off is running premix 40:1 rather than 50:1 it should be would that make it run rich or weak ( as in fuel quantity rather than oil )due to 40:1 ratio ????? Answers on a postcard please lol

try unscrewing the idle screw a full 0ne and a half turns out

[Grumpy Old Git]

Idle screw initial setting = 1.5 turns out (from full in).

Mixture screw out 2 turns - sstart bike and when running warm, adust idle to give 1900 revs, then 'peak' mixture. Keep backing off idle & peaaking mixture till it is running stable at 1500 (i.e. 'peaked').

Next operate throttle to check for any 'dead spots'.

NB. If you have trouble setting the carb. Check the needle setting and return to factory setting if not correct. Check ALL air hose couplings and filter for leaks. Use 50:1 with the correct oil and 'good' fuel. Ensure spark plug is correct type, set to correct gap. If still 'bad', check exhaust has no holes and baffle is intact. Check fuel filter (the reserve filter mesh is inside the tank!).

These engines are very well built and should run fine.