Hi i recentley got one of these i did the engine as the manual instructed however when i apply throttle it smokes alot then moves of slowly and then builds up pace, sometijmes when throttle is applied it just stalls. What is the ideal needle settings for the carb on this buggy? cheers

you need to tune it...

Here's how to tune a motor:

First start the engine up and run it around for about three minutes. Run it really hard like you're racing around a track. Then do a couple of full speed passes, after each pass lean the high speed (one on top of carb) needle 1/8 of a turn each time. The car should get faster and faster on the top end. Eventually you will reach peak horsepower and after that each time that you lean the motor, the power will decrease. At this point go back to the peak horsepower setting, and richen it a 1/4 to 1/2 of a turn further. Your car should have plenty of smoke this time coming out of the exhaust. Then bring the car in after a full speed pass and immediately let the motor idle while you pinch the fuel line anywhere. The engine should cut out after about four or five seconds. The engine should also rev up before it shuts down. If your engine shuts down before four seconds or it doesn't rev up, then your engine is running too lean and I would richen it immediately anywhere from 1/8 to 1/4 of a turn. If any longer than 5 seconds, its okay, but if you want crisper throttle response, lean it 1/8 turn at a time and continue to do the pinch test. After you've tuned the low-end correctly, then you can adjust your idle speed. This should be adjusted so that the engine does not engage the clutch at idle.

I hope this helps,
Erik

thanks for that, which is the low speed needle? the one underneeth the carb?

low speed is usually at the end of carb arm that moves in and out

guest is right... the low speed is on the arm and the one below the carb adjusts the idle speed....

NOTE: When making adjustments to either the low speed or idle speed adjustments, always have the carb slightly open or you will damage either the o-rings, needle, or carb barrel