Having problems jetting my 250R correctly.

[The Goat]

jetting between two identical bikes can be ridiculously different.

I know nothing about 2 stroke, but I do know that my jetting for my 200x is GREATLY different than anyone else on the boards. I'm running a main 25 sizes larger than anyone else with a similar carb from what I've heard.

[Blown 331]

jetting between two identical bikes can be ridiculously different.

I know nothing about 2 stroke, but I do know that my jetting for my 200x is GREATLY different than anyone else on the boards. I'm running a main 25 sizes larger than anyone else with a similar carb from what I've heard.

Well I guess what I have going on does make a little sense then. But I've never heard of a 250R taking a 195 main. wow.

[350Kris]

You could probably keep your 175 jet and install a dial-a-jet...just another option.

[The Goat]

well I'd bet you're detonating.

correct me if I'm wrong guys, but I remember seeing something that two piece base gasket meant 100+ octane...and one piece meant 110+

having said that though....I had a 200x engine with over 185psi of compression, and she ran fine on 87.

[88 Turbo Coupe]

Does your gas staion use 93 with ethanol? Buy a couple of plugs an do a plug chop and stop waisting your time.

[Blown 331]

Does your gas staion use 93 with ethanol? Buy a couple of plugs an do a plug chop and stop waistig your time.

Yes it has up to 10% ethanol. And my thoughts on the plug chop are this. I'm running so lean that its not running correctly when I hit WOT or get close so I sure don't want to do a WOT blast down the road if I'm that lean.

[88 Turbo Coupe]

Well.... you don't do a WOT when you do a plug chop. So whats the problem?

[88 Turbo Coupe]

Btw........ Ethanol is GARBAGE

[Blown 331]

Well.... you don't do a WOT when you do a plug chop. So whats the problem?

So tell me how doing a plug chop to adjust your main jet is going to work if you are not at WOT?

Btw........ Ethanol is GARBAGE

I buy most of my gas in Missouri cause it's cheaper but weather I get it in Missouri or Illinois it is all up to 10% ethanol, not much I can do about that. I know it's not ideal but no one really has problems with it. I can get leaded 110 octane that has no ethanol.

[x.system]

Well I guess what I have going on does make a little sense then. But I've never heard of a 250R taking a 195 main. wow.

My tt bike takes a 220/225 main in the winter months, 175 to 185 in the summer heat but every R motor is different. I would recomend not using those aftermarket jets, I've had a few break off. Be careful with detonation also, it doesn't take much to toast a piston.