I have a SUSUKI 2 STROKE Model LT-50 ATV made in DEC. 1985. Originally designed with an OIL INJECTION system that has been removed and plugged. It runs pretty fair on 8 oz. 2 stroke OIL to 5 gal. of 87 Octane GAS but won't start when cold unless it has a shot of B12 carb cleaner down the carb inlet. Does the FUEL MIX sound right? Spark Plug GAP is .030. Is this the CORRECT GAP? The CARB has 2 adjusment screws. One is bronse slotted and is located near what looks like the old OIL INJECTION inlet (INLET PLUGGED). The other ADJUSTMENT SCREW is steel Phillips and NEITHER screw seems to have much effect when adjusted. In fact, it runs with BOTH SCREWS CLOSED! HOW do I adjust FUEL/AIR MIX and IDLE SPEED? Does the IGNITION have POINTS? If so, WHAT is the CORRECT GAP?

 

The fuel mixture sounds about right, of the top of my head that should be around 38-40 to 1 mixture. It sounds like your choke isnt working, I am not sure how that one is set up but I would make sure the choke is working properly. I just looked at the parts fiche and it has a magneto so there would be no points. I would take the carb apart and clean it good. It shouldn't idle very well with the air screw all the way in, it should almost flood it out. I would give the carb a good cleaning and make sure the choke is working properly. If you want to PM me I can get you to the micro fiche.