Perfect Speed of Gear Shifting - Honda CBR250R Forum : Honda CBR 250 Forums
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post #1 of 25 Old 12-03-2012, 02:00 PM Thread Starter
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Perfect Speed of Gear Shifting

Just for curiosity plz post at what speed you ppl shift gears upwards..
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post #2 of 25 Old 12-03-2012, 02:19 PM
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You mean what RPM/MPH? That all depends on what you're doing. If you're commuting, you want to shift as low as possible for MPGs. If you're racing, you want to shift as high as possible for max power.

How fast do you shift? As fast as possible. Time between gears = loss of efficiency/mpg/speed.
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post #3 of 25 Old 12-03-2012, 02:47 PM Thread Starter
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You mean what RPM/MPH? That all depends on what you're doing. If you're commuting, you want to shift as low as possible for MPGs. If you're racing, you want to shift as high as possible for max power.

How fast do you shift? As fast as possible. Time between gears = loss of efficiency/mpg/speed.
At what MPH/Kmph.. what is MPG?
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post #4 of 25 Old 12-03-2012, 03:15 PM
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post #5 of 25 Old 12-03-2012, 08:24 PM
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I ride my bike hard all the time. I don't know what speed I shift at because it is irrelevant. I usually shift at 8500 - 9000 rpm.

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post #6 of 25 Old 12-03-2012, 08:24 PM
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Garage
Shift RPM

From what knowledge I've gained from this forum, it appears that 5-7K RPMs represents the most efficient range for transmitting power and accelerating. As such, shifting in this band is preferable -- the upper part of the band or beyond when max acceleration is desired, and the lower part or even down to 4500 RPMs when in a gentle commuting mode.

I have read that shifting at too low of an RPM, say below 4000 RPMs is not desired, as the engine is likely to lug along, which is not good for the engine bearings.

My first day out with my bike, I was lugging a lot, shifting at 2500-3000 RPMS to get used to the manual transmission. In hindsight, boy was that engine lugging back then!

Gary W. (newbie)
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post #7 of 25 Old 12-03-2012, 08:37 PM
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At first i was shifting according to the manual, nowadays i shift anywhere from 6 - 8 RPMs.
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post #8 of 25 Old 12-04-2012, 09:04 AM Thread Starter
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thanx guys.. i shift

1st- 0 to 14kmph
2nd-14 to 26kmph
3rd- 26 to 38kmph
4th- 38 to 48kmph
5th- 48 to 56kmph
6th- 56 onwards
___
max rpm 4500. any suggestion?
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post #9 of 25 Old 12-04-2012, 11:58 AM
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I wouldn't check the KPH when shifting.

Max RPM of 4500 seems very low !!
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post #10 of 25 Old 12-04-2012, 12:17 PM
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When you feel the bike stutter like its having an epileptic fit its probably time to bang up a gear.
When it's not going any faster its time to bang it down a cog.
problem with the cbr its got a narrow band between 8500 and 10,000, outside of that it moves slower than Australia Post.

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