Hey how's it going, so I bought a truggy a while back and it came with a os speed spec 2 the guy also gave me a couple extra os carbs. So the one carb in engine has a long needle. He gave me a another carb with long needle and another carb with short needle. They all say 21j on the carb. Do all the carbs just say 21j? I know there is a couple differnt 21j carbs
Since I didn't buy this engine new, what is the stock needle that comes with 21j carb on os speed spec2. Note this one is not the tessman spec 2.
Please only answer my questions if your 100 percent sure thanks.

Anyone use the the 21j carb on non os speed engine? Probably going to try it out tomorrow on another engine.