[jrsqlc]

i am having a ton of trouble getting my 91 250x to start.
i have good spark and it seems like it wants to start, just wont.

it has a .50 bore with 12:1 compression (domed piston) and i have a GNCC race head on it. the head is ported and polished and has everything done but bigger valves.
I was told i should use race gas (108 octane) with this setup, and thats what is the tank.

what can i do to try and start this? i believe that the reverse is bypassed, but not completely sure.
any help would be great!!

 

[MLR Synthetics]

Might be a carburetor problem. How long has it been sitting. I would try cleaning the carburetor first and see how it runs.

 

[Helmut]

I agree. If it's been sitting for any length of time, try cleaning the carb.

 

[jrsqlc]

carb is clean it is shooting fuel
i think the jetting might be off and dont know what it should be at.
i also have a 400ex carb that i want to put on it, but dont know what to jet that at either. i know how to work on them, just dont know what jets to use!!

 

[Helmut]

Moose or Billy should be able to help you with the jetting when they get on here. They both fly the 250X.

 

[hondarider250]

im having the same problem it has plenty of spark when i kick it it wants to start but never does
not sure whats the matter with it i have a 87 honda fourtraxx 250x somone please help me

 

[Billy250X]

Well with an over bore high comp piston and a P&P head you'd probably need a 42 pilot and a 130-135 main.

 

[jrsqlc]

well i also have a 400ex carb that i would like to put on, but dont know what jets to use in it either. any help there?

 

[Billy250X]

Somewhere close to what I told you.I think they use the same jets.