How high can I rev my CBR?

[steved]

Anything like 1989 or older and you really wouldn't want to take it past redline. Apparently they don't have a rev limiter. I found out the hard way, after over revving my '89 CBR400RR and blowing the motor.

My 1989 CBR250R had a rev-limiter for sure. Found that out on the straight at Puke. Bit surprised at your old CBR400 dropping it's guts.

[steved]

How often is changing the Oil filter and oil? Like 5k or less?

I have been around bikes for years but you dont really change farm bikes oil so whats often on a Road bike of the CBR250RR calibre?

I've always seen 5000 km for oil, 10,000km for oil and filter.

[duckaddict]

A good rule of thumb for long engine life is the two-thirds rule. Do not exceed either two-thirds maximum revs or two-thirds full throttle in general use.

This does not apply to modern bikes (year 2000 and above), or does it?

[HDTboy]

A good rule of thumb for long engine life is the two-thirds rule. Do not exceed either two-thirds maximum revs or two-thirds full throttle in general use.

This does not apply to two strokes.

My CBR250 lived at redline all the time, and had well over 90'000kms on it.
The rev limiter hits at 21'000 rpm so use 19'000 all you need

[FilthyLuka]

ride your motorcycle like it owes you money. If you got it from redbaron it probably does