How often should I lube the chain; what should I use to do so?
How do I clean the chain?
How do I measure chain slack?
How do I adjust chain/rear wheel alignment?
When does the chain need replacement?
How do I replace the chain?
Removing/replacing the rear wheel
What replacement chain/sprockets should I consider?
I want to change my gearing
Do I need a different chain if I change my gearing?
How do I change the front sprocket?
My front sprocket "wobbles"
How do I adjust the shifter?
Speed @ rpm calculator
How to shim the cush drive
Greasing the axles & wheel bearings
Replacing the wheel bearings
A brief guide to bearings
I am having trouble putting my bike on its centerstand
EX250 parts diagrams