smooth out an 87 CR250

[TheDamo]

Hi Guys,
Has anyone had experience with smoothing out the power on an 87 CR250?
Some more bottom end and transition to mid range would be nice.
Cheers

[Lozza]

Do you want the easy or the hard way?

[Paul552]

http://www.g2ergo.com/dirt-bike-g2-ergonomics-products.html

http://www.ebay.com.au/itm/G2-Ergonomics-Throttle-Cam-System-2-Stroke-Honda-CR-125-250-89-07-500-89-01-NEW-/380641312734?pt=Motorcycles_Parts_Accessories&hash=item589ffd7fde&_uhb=1

Maybe it might help tame it?

[TheDamo]

http://www.g2ergo.com/dirt-bike-g2-ergonomics-products.html

http://www.ebay.com.au/itm/G2-Ergonomics-Throttle-Cam-System-2-Stroke-Honda-CR-125-250-89-07-500-89-01-NEW-/380641312734?pt=Motorcycles_Parts_Accessories&hash=item589ffd7fde&_uhb=1

Maybe it might help tame it?

Interesting thanks for the link

[TheDamo]

Do you want the easy or the hard way?

Gimme both thanks

[Damo]

Boyesen Rad Valve and Keihin 38mm Airstriker

[Lozza]

Do you want the easy or the hard way?

Gimme both thanks

We'll start with the easy way. Machine a 50mm spacer  minimum 2mm LARGER ID than the exhaust duct outlet, Then fit that between the pipe and the cylinder. Test. Measure stinger/tailpipe ID(usualy 27mm).

[whitey 43]

From what ive heard, you can buy a flywheel weight which screws into the puller thread...It works really well on the late 80s cr 250s, & would smooth your hit out & make the power more useable.

[80-85 husky]

How is the needle jetting? if its rich it will give a harder hit as it transitions than if its spot on?

got blubbering and drag at 1/4 to 1/2 throttle