I got a frankenblaster. I'm not sure if the year. It appears to have the tors system disabled. So my problem is when I bought it the engine had low compression. So I ordered a new jug new piston rings and bearing I also noticed it had bad reeds so I replaced them as well and I did a carb rebuild well after that I got it to start and it will Rev just a little maybe 1/3 then it dies. I went back to the carb and put the original pilot and main jet back in because it had a much larger than factory jet. I'm at a loss I cannot figure out what is making it not Rev and run correctly. On a side note I have also fiddled with the needle. when I rebuilt it I set it to the stock center position I've since leaned it and it gets better results. I have no air box cover never did. Got dg aftermarket exhaust. And tasanari 4 reeds. The jet I think is labeled 340. That's the best info I can give and advice would be appreciated.