92 shee

Trying to figure this problem out got a 92 banshee,stock carbs,tors removed with carb caps and idle kit,wiring is stripped down to bare minimum,just has key switch to turn on and off,so when key is on machine will start and run for about couple of seconds and then dies,go to start it back up and nothing,check spark and nothing,i traced it to the cdi box, i take the cdi box off of the frame and tap the cdi box with my hand and then i have spark again? could the cdi box be defective,i checked the gap between the stator and pickup its within spec( business card),checked the whole harness its good,i dont have a ohms meter to check out the stator,pickup,coil and other electrical parts,are the aftermarket adjustible cdi boxes anygood? Thanks for your help Eric....

thanks everyone for your input,and thaks a ton sleeper06,got all my jets and pilots on friday put the 290 mains in and put the carb bowls on the correct sides and it fired on the 3rd kick,idled great,rode it down the street ran awesome,did a plug check and they look good,still need to do a plug chop but i bet the jetting is right on,thanks again... Eric.

Hey there, trying to get a baseline on my jetting,i got this on a trade deal and it wouldnt start unless you pull started it,so i did a compression check it was 80psi on both cylinders,so i did a top end rebuild it is 66.50mm now,compression is 150psi both cylinders,no port work pro design cool head 19cc domes,pump gas 91 octane 40:1 mix,pro design billet intakes had a pro design boost bottle on it but one of the rubber grommets is torn so i took it off and put a section of heater hose to connect from intake to intake, fmf ram valves with new boysen reeds for the ram valves,fmf fattys with fmf silencers,stock mikuni carbs tors switches are still on the tops off the carbs,but all the other tors stuff is gone,k&n pods with outerwears,my elevation is 5300'+,temperature for jetting range is 65-75 degrees,my main jets are 320,pilots are 30, stock needle clip is on the 3rd from top,air screws are 1 1/2 turns out, i tried starting it it would not kick start so i pull started it it started right up and had a bogg or hesitation until you gave it 1/4 throttle or so,rode it for about 10 minutes and thougt this is not right? is this a good starting point for jetting? is this too much compression for pump gas? any help would be greatly appreciated Thanks Eric..

Thanks everyone for your input this helps me out a ton. Eric...

New to the site,got a 92 shee on a trade deal, doin a fresh top end on it and wanted to know what you guys like to mix your oil and gas at as far as the ratio? I have always mixed my other 2 strokes at 40:1 with bel ray h1r and 91 octane pump gas, also what break-in procedure do you guys like to use? Thanks for the help Eric..