Driven sprocket, rear, 40T, 520 size, CBR250R

[KITACO 535-1818040 Driven Sprocket Rear 40T 520 Size CBR250R KITACO 535-1818040]
Made of lightweight and highly durable S45C (high carbon steel).
The timing for replacing sprockets is very ambiguous, with no clear standards.
"Wear on the tooth tips" is the determining factor in such cases.
It is time to replace the sprocket when the tooth tips become pointed, or the belly or sides are worn down.
Replacing all three parts—front and rear sprockets and chain—simultaneously is recommended. If you only replace one of them, the worn parts that haven't been replaced will cause the new parts to underperform and wear out faster, reducing their lifespan. Therefore, replacing all three simultaneously is ultimately better in the long run.
Changing the gear ratio will cause an error in the speedometer reading, so it is recommended for race use.
Inspect the sprocket every 1,000 km, using general driving as a guide.
If the tooth tips are thin, replace them with new ones.
Daily lubrication significantly extends the life of sprockets and chains.
520 size
For race use only
Compatible models: CBR250R (MC41)
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