300EX jetting at 4,720 ft. PLEASE HELP!!!!

[dasanii19]

I have a 300ex at 4,720 ft. elivation, I just took my carb off and it has a 38 pilot and a 135 main. My mods are full rcm DG exhaust and a moose foam filter with my lid off.

Please give me an idea of where im suppost to be jetted at, also is there a air fuel mixture screw I need to fool with to tune it after I get my jetting right? And where is the idle screw at?

I just got this 1993 300ex because my 04 z400 just got ripped off, so now im trying to learn a little about hondas. anyone that knows any of these questions please reply. I need to get this thing running...

And what MM is the stock carb on the 300ex? And would it be a good idea to upgrade to something like a 39MM fcr off a yfz or 400ex?

And how do I get the damn spark plug out, ive tried all my spark plug sockets and none will fit and let me get a turn on it????

Try to answer all these questions as best as possible. It will be very helpful for me..

[dasanii19]

Somebody please take the time to help me out..

[dasanii19]

bump

[dasanii19]

somebody has to know one of these questions

[dasanii19]

come on somebody

[underpowered]

Originally posted by dasanii19
I have a 300ex at 4,720 ft. elivation, I just took my carb off and it has a 38 pilot and a 135 main. My mods are full rcm DG exhaust and a moose foam filter with my lid off.

Please give me an idea of where im suppost to be jetted at, also is there a air fuel mixture screw I need to fool with to tune it after I get my jetting right? And where is the idle screw at?

I just got this 1993 300ex because my 04 z400 just got ripped off, so now im trying to learn a little about hondas. anyone that knows any of these questions please reply. I need to get this thing running...

And what MM is the stock carb on the 300ex? And would it be a good idea to upgrade to something like a 39MM fcr off a yfz or 400ex?

And how do I get the damn spark plug out, ive tried all my spark plug sockets and none will fit and let me get a turn on it????

Try to answer all these questions as best as possible. It will be very helpful for me..

try posting in the powertrain forum or the sport class forum. i am not reall sure on 300ex jetting, but i am sure someone in the sportclass forum could help how does it run now, i know on my old 300 i had a 138 with a full supertrapp, K&N with no box lid. if you get the plug out check it.

i think a stock 300 carb is like a 32mm

A 39 may be too big, a 400ex carb (35.5mm) makes a great improvement to these bikes.

it takes an 18mm socket, you sould be able to get it with a deepwell and a 1" extention.