Well i got me a 250r yesterday and i love it...i rode it all day and im so sore...but i tell you what it is worth it.....the one thing i dont like about it is that it doesnt have much of a top end....could anybody tell me how i could increase my top end with out losing much acceleration....thanx alot....bryan

 

Is your bike completely stock? Does it have a aftermarket pipe? If so which pipe? Whats your gearing?

 

38mm carb , pipe and filter and different sprocket combo. only $500 or so

 

A 38mm carb would probably starve some of his low end. I wouldn't go any bigger than a 36mm.

 

Congrats!
Take care of her, and she'll take care of you![img]i/expressions/face-icon-small-wink.gif[/img]

 

it is all stock exept for a fmf pipe and a cut off silencer.....how much faster would the carb make it

 

38 and 39's are common carbs to throw on a 250r, especialy the "airstryker" models. Is the motor fresh? check the compression with a compression tester, you should have at least 125psi in the cylinder, that's pretty much a stock number. You'll like it better with around 165-175psi in the cylinder, just have to run good gas with it.

 

Stock compression in a 250R is actually 170 or higher with a good accurate compression tester.
If it is 125, there is something seriously wrong!


ridered62;
You should look into porting the motor, bumping up the compression, getting a bigger carb, and getting an aftermarket airfilter.
This will improve the performance and power of the motor considerably.

If you DO decide to get motor work done to it, be sure to take it to someone reputable. Take it to the wrong person, and they can really screw it up!

 

Is your pipe a FMF FATTY or a FMF HI-REV? What year is your bike?

 

well my pipe is a fmf gold series....and its an 86 model...and i found out that my carb is a 39 mm, and also i have a k&n air filter