How to tune a 1984 Honda 250r the RIGHT way?

[AlbinoDuck]

okay so i bought a 84 honda 250r and it runs and starts like a champ...theres one issue. When i rev the balls outta it it stutters. I'm assuming this is because my air/fuel mixture is messed up. How can i adjust this? It only stutters when i full throttle it...seems like there might be a lack of fuel or air? If you could help that'd be great! Thanks

[beets442]

Get your fuel at a decent idle. Start with the air screw mostly in. Back the airscrew out til the idle goes up as high as it can go then turn back in 1/4-1/2 turn. It should be idleing just a hair high, so turn the idle back down a hair. SET! This is how I set mine but the stuttering could be caused by something else. Is this @ WOT in gear?

[AlbinoDuck]

Which one is the air screw?
I'm almost positive its the one on the left..
124716

[AlbinoDuck]

what other things would cause it to stutter?

[beets442]

Yes, air screw is on the left. Dirty main jet, plug wire arcing out, bad gas mix.....manual can be found here, thanxs to Oscarmayer http://www.oscarmayer.net/atc/manuals/

[AlbinoDuck]

okay well i will clean the carb and put some new gas in her. I just bought the trike and dont no what a good fuel mixture is what do you suggest? i will put fresh gas in her tomorrow.

[beets442]

......32:1..... The 84' is my fav year. Good luck and let us know how it goes.

[AlbinoDuck]

Alright thanks man

[Auto_Demon]

i run 50:1 in my 83R and the plug is always a golden brown

[hillbilly 200x]

I run 94 octane and motul oil at 32:1 and I have never had any problem.