High Comp 200x motor/carb adjustments/exhaust

[Oldshell4481]

I am buying a 200x motor off of 90nut and am wondering if race gas can be substituted with jet fuel?? The motor has the 12:1 comp piston and I believe it requires high octane gas. What carb adjustments are need also.
If anyone can recommend me a good but not too expensive exhaust, go for it, I need one of them, or else im going to end up fabbing up a cobra that only has the cone end of the pipe with no connector for the headpipe, to fit onto the machine.

Thank You,
John Tripp

[Oldshell4481]

Thanks for the replies.

[deathman53]

12:1 needs race gas, straight, not mixed w/ regular. you can use avaition fuel also, some say its bad for 2 strokes and others say it makes plug readings weird, but avaition fuel is about 7% lead, most race gas is 5% lead. carb adjustments will have to been done with the bike complete. Do yourself a favor, buy a complete pipe, don't fab one together.

[3Razors]

100ll av gas would be a good choice

[Oldshell4481]

will i end up needing to get ahold of some new jets

[90nut]

Hey ma I could have checked the jets that are in my carb for you. I think I told you but I ran 110 in it with my super trapp pipe. I still have it if your are interested. I will check oout my jets and let you know.

[Oldshell4481]

yeah if i could get the jet settings and stuff thatd be great, and if you could tell me how your carb is set up to run with it, that would also be great. i get my paycheck tomorrow so ill send you some money.

[90nut]

I will check it out for you tomorrow evening just because I don't feel like going out to the shop right now. But I will let you know.

[PsychoX]

hey... i have an 86 200x bored .20 over high comp. 12-1 piston ... ported and polished head i did myself... uni filter and dg exhaust and a couple others but ... the dg exhaust is a good exhaust... its kinda loud but gives good power for a cheap price, and also... 90 nut i would like to know what you jetted ** carbs at b/c i have been tryin to find a 200xr carb or a 28 mm carb for mine ... but i cant so i have a race this weekend and need to jet it and would liek to know what you jetted it at soooo if you could let me know ...thanks