im going to kill it

[bmxnick7]

well lets see i have a 250r with a 310 big bore it still has the stock carb, and it is not running right, i tried 145-163 main jets and nothing it runs fine idling and till about 3/4 throttle then after that its jsut like shit. i am going to be ordering a 38mm carb sooon, but any help will be appreciated

[awames76]

3/4 is the main jet, how does it run. like what is it doing. maybe bigger or smaller on the main dont know

[bmxnick7]

yea so far i tried from 145-163 and it still breaks up like crazy, it had a 152 and it ran fine then i change it one day and now it wont run for nothing

[Bad Ass Honda 250r]

sure the reeds are good..... the plug is good..... sure its mixed right..... sure the carb is not plugged... sure the exhaust is not plugged..

[drag lt guy]

could very well be electrical if its cutting out...

[trx]

stock carb on a 310 kit there in lies ur problem u need a 36mm

[ameier5051]

I have a Turner Ported motor that was running like complete hell. Called Duncan Racing and they said it needed a 36mm PJ so i'm guessing that is your problem also. I am having Denny freshen up the cylinder and going with that carb.

Let me know what you decide on a carb and where to get them. I am also in the market haha.

P.S. I thought I had it bad. There aren't any riding places here but DDDAAAAMMMMNNNN, I was around East Haven last week, there's NOWHERE to ride around there haha.

[fulltiltrider]

Even being too small of a carb, you should be able to get it to run right. Although it would probably feel like you had a governer on it. Probably wont rev high at all. I'd just get a 38 A/S and call it a day.

[all250r]

A cheap check of hte eletrical is the try a new BR9ES plug. If your compression is high gap it tighter than what the manual calls for. Other than fuel, it has to be electrical or compression.

[ky 2stroker]

Originally Posted by fulltiltrider

Even being too small of a carb, you should be able to get it to run right. Although it would probably feel like you had a governer on it. Probably wont rev high at all. I'd just get a 38 A/S and call it a day.

yep I have to agree with ya on this. when I first got my cylinder ported and got it put on the motor and everything, I still had the stock carb on it and a esr trx 5 pipe. at first it barely ran any better then before when it was all stock and had the stock pipe. then when I got my 38mm A/S carb and put it on.......................it was crazy how much of a difference it made. it pulled so much harder through the whole rpm range that it felt like a semi truck had rammed me in the ass when the powerband had kicked it. man just trust me, your bike will perform completely different with a bigger carb.