NTTC Carb Jet

Does anyone know what size jet is in the standard NTTC carb. I need to re-jet slightly smaller (it's 4 stroking) would like to know what the starting point is. Thanks for any help.

I found that the standard jet is .72mm, which is fine for a 16:1 ratio ( I guess), but on mine it 4 stroked unmercifully. I'm a firm believer that 16:1 is too lean a mixture and when breaking in the engine, it runs too anemic. After 1 tank of 24 to 1, I re-jetted to .66mm (SBP sells the jets for $3.95 each, not knowing what to get, I bought 5 sizes below .72mm) I'm running 37to1 (2.6 oz. to 3 qts. of 89) fuel. I tried moving the needle up and down , but it only effects performance from above idle to about 3/4 throttle.(works best for me at the second ring, factory setting). At WOT the engine runs just a skosh on the side towards rich. I determine this by the fact that pulling my 205 lbs. the bike pulls slightly harder when going up a moderate hill. It rolls about 31mph on the level with the throttle just short of WOT, when you come to a hill roll on WOT and it clears most hills (Connecticut hills) at 20 plus. I also bought http://www.widgetsupply.com/product/BLU01.html and looked up the converssion for mm to number bit sizes, and now I can "brew" my own. I can also solder the original .72mm jet and drill them to .66mm. The plug now runs a "dry light chocolate" color instead of the "wet black" with the .72mm. That's my story.