I've got a stock 250 and was wondering if anyone knew the to speed. Thanks!

 

im thinking about 52-58 that sounds right to me?

 

It doesnt have enough power to reach its rev limiter (8600rpm), but with a pipe and filter i think it should hit aproximately 58-60mph

stock will be 45 during and before break in, 50-53 after breat in (takes about 50 hours for it to get broken in completely, it just keeps getting more power as time goes on)

 

I clocked mine at 45mph brand new. That's good to know about it getting faster and more powerful.

 

It got there pretty quickly, but topped out at 45. I thought that was just because of the front sprocket being too small limited its top speed. I'm putting a 23-tooth front sprocket on there to see what that does.

 

you will go much slower slower with the 23 on the front- unless it will allow it to go 60mph at 5500rpm at which it has peak torque-

I think you could go down a tooth on the front without losing any top speed- because it just doesnt have enough power to rev to 8600rpm with the stock gearing (well it doesnt sound like its revving to 8600rpm + when i went down this one huge hill, i could have sworn i was going 62mph) With a smaller front sprocket it should get a bit more leverage/torque allowing it to revv quicker and higher- therefore, keeping its 50mph top speed

 

just wondering where did you get a 23 tooth front sprocket from I would like to get a different one for my sons DS250

 

How long did it take to get to 60?

50 is more realistic from a stock model.

Changing the pipe and filter won't make the top speed increase, it will just get to it faster.

Only way to gain speed is change the sprockets. What you gain on top end speed, plan on losing some low end torque.

 

<div class="FTQUOTE"><begin quote>Originally posted by: Scootergptx

How long did it take to get to 60?



50 is more realistic from a stock model.



Changing the pipe and filter won't make the top speed increase, it will just get to it faster.



Only way to gain speed is change the sprockets. What you gain on top end speed, plan on losing some low end torque.</end quote></div>

a pipe and fliter will increase the top speed.... more power will let it actually touch the rev limit.... just compare the way it sounds when you rev it all the way out in neutral vs driving at WOT-

-or race against a quad that is faster top speed than the ds250 and is able to touch the rev limit. (400ex in 3rd or 4th gear should work) Then both build up speed while staying next to each other- when the ds250 tops out, the 400ex should pin it until the rev limit.... When the 400ex is completely revved out in 3rd or 4th, remember how fast it is pulling away (probly about 10mph faster...)

Then you go down a loong hill 30degree decline and at least a 1/4mile long- then you compare how fast the 400ex pulls awayh from the ds250- it will probably be close

In a straight line, a crf230f or crf150f will destroy a ds250.... down a 30degree decline, the ds250 should be able to keep up decently....(a 125 trailbike -not 2 stroke racer- will be overrevving a lot when the ds250 passes it- they have to pull in the clutch to keep from blowing or being left behind