Repository containing information about parts and modifications for various motorcycles

This project is maintained by mitchellwaite

KLX 250

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While the information on this page focuses mostly on the 2009+ carbureted KLX, there are a lot of similarities to previous and currently produced KLX 250 and 300 models. A version of the engine was used in the 2014 - 2017 Ninja 250SL and Z250SL models.

The engine has also been cloned as the YF300, and is used in a number of different 300cc Loncin models.


Manual Cam Chain Tensioner

Carburetor Jet Kits and CDI tuning
EFI tuning

Big Bore Kits and Parts
Cam Upgrades
Clutch Spring & Plate Upgrades

Parts & Repair

Maintenance Items
Parts Reference


Cylinder Head & Cam Differences