Technical specifications for the 2014 Yamaha YZ250F have been posted in the Technical Support section. Here you can find engine technical specs such as engine oil quantity and valve clearances. Suspension technical specs such as stock spring rates and oil volumes. Chassis technical specs such as trail, rake, and seat height.
A look inside the Showa SFF Gen II Fork Showa SFF Gen II Fork Technical Guide
SDI KYB PSF Midvalve Piston (Pair) Creates a more linear damping curve Increases low speed damping (this is good) Decreases the high speed damping spike (this is excellent) Designed with a DU bushing for decreased friction Comes with shims and washers Sold as a pair Starting point spec sheet posted in pictures above Fits the 2013-2014 Honda CRF450 and Kawasaki KX450F Let JBI Suspension [...]
Upgrade your KTM WP Twin Chamber forks to feel plusher and have better bottoming resistance with the pressure sensitive JBI Pro Perch spring seat.
JBI Synergy Suspension Revalve improves the 2013-2014 Kawasaki KX450F KYB PSF Air Fork performance and feel characteristics.
The MXT WP PDS Shock Needle Upgrade kit by MX Tech improves the entire performance spectrum of the WP rear shock on KTM dirt bikes. The result is a plusher shock, improved traction, and better bottoming resistance.
The Enzo Technica Shock Compression Adjuster improves rear shock performance on KYB shocks by creating a better internal pressure balance and elimination of harsh high speed spikes.
How exactly does the MXT PSF to SFF Fork conversion work? The MXT PSF to SFF Fork Conversion is accomplished by removing the KYB PSF fork cartridge damper in one fork and replacing it with the MXT SFF Spring Setup. This fork will now perform as the fork spring similar to the Showa SFF fork. [...]
Here is the first look at the production JBI Pro Perch fork upgrade that improves bottoming feel and resistance in KYB, Showa, and WP twin chamber forks.
MXT PSF Huckvalve made by MX Tech improves the hydraulic bottoming circuit resulting in better bottoming feel and resistance.