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I found this article about how a Honda India Technician says you only need to change oil every 12 000km, i think that is a bit excessive. Even if it is biased on you new designed motor..
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crank as and camshaft CBR 250 are no longer using a roller type of bearing. It use ring type, same type with common bearing in the car, which is need a fluid/lube to change roller function.
high oil pressure will make crank and camshaft almost frictionless, gap between as and bearing is only 0.075 mm... so a liquid type of lube is mandatory.... recommendation is 10W-30
advantage
- less noise
- less friction
- lower temperature
- longer part and lube usage
AHM (Honda Indonesia) recommendation is 12,000 km..
I think i'll stick with the 1-3000 km option..
Google Translate
crank as and camshaft CBR 250 are no longer using a roller type of bearing. It use ring type, same type with common bearing in the car, which is need a fluid/lube to change roller function.
high oil pressure will make crank and camshaft almost frictionless, gap between as and bearing is only 0.075 mm... so a liquid type of lube is mandatory.... recommendation is 10W-30

advantage
- less noise
- less friction
- lower temperature
- longer part and lube usage
AHM (Honda Indonesia) recommendation is 12,000 km..
I think i'll stick with the 1-3000 km option..