Rev limiter - Honda CTX700 Forum
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post #1 of 43 (permalink) Old 01-13-2016, 12:22 AM Thread Starter
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Lightbulb Rev limiter

Hey guys anyone know of any mods for moving rev limiter or possible computer upgrades? I'm not sure what controls everything on this bike but I'm sure someone out there has tinkered with this bike.

Thanks for the input.

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post #2 of 43 (permalink) Old 01-13-2016, 12:37 AM
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There are mods floating around for dyno usage but i've seen no posts here indicating anyone's tried to remove the rev limiter or bypass it.

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post #3 of 43 (permalink) Old 01-13-2016, 01:29 AM Thread Starter
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Does anyone have Insite on how many more rpms this engine can turn with current setup? I know for a bike it sure seems like the red line is super low....

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post #4 of 43 (permalink) Old 01-13-2016, 02:02 AM
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Does anyone have Insite on how many more rpms this engine can turn with current setup? I know for a bike it sure seems like the red line is super low....
The rev limiter is around 6200-6500 rpm's, i've hit it on many occasions.
I've yet to peg it in 6th gear because you'd have to be doing 125 or something. (Keep in mind 105-110 is around 5600 in 6th)
If you are looking to go faster this is the wrong bike for you, my eye wanders towards other bikes such as the VFR, you could score a used VFR for a very good price.

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post #5 of 43 (permalink) Old 01-13-2016, 07:21 AM
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The only way is to change the PCM's programing. I don't see why you would want to anyway, it is already tweaked for efficiency and durability. Going anymore can and will result in serious engine damage, that is why it is there in the first place. The rev limit is just fine for this engine. All engines are designed and run differently. If it was a 180 crank for instance, the rev limit would be around 12k, but power output would drasticly change throught the rpm-powerband. The CTX and its engine are not sport or race bike in anyway. If your hitting the limiter, you need to shift sooner! Still not fast enuff for you, you need a faster bike!
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post #6 of 43 (permalink) Old 01-13-2016, 10:58 AM Thread Starter
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I know peak hp is at the top of the rev limiter. If your just getting out on the highway and getting up to speed you can hit the limiter very quick. I'm sure the current programming is set up for low end and for emissions.
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post #7 of 43 (permalink) Old 01-13-2016, 11:56 AM
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The rev limiter is set at 6500 rpm. The CTX is also speed limited to 106 (+/- 2) mph. Max HP: 47 @ 6250 rpm. Max Torque: 44 ft-lb @ 4750 rpm.


As far as its potential, 670cc parallel twin is more than capable of producing more hp but then one has to ask at what cost and benefit. The 670 is a long stroke motor with a 270 degree crank specifically designed for low to mid range torque. Its efficiency is already at the top of its ball game by a considerable margin. The flat torque curve guaranties 40 ft-lbs of torque through out its power band. No small feat for a small cc engine.


As far as changing the PGMs mapping, there is currently nothing on the market which will allow this that I'm aware of and Honda has no intent on changing it. It is what it is. You might want to consider shifting a bit earlier than red line since ultimately you face issues of diminishing returns that can actually slow you down.
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Last edited by jfc77320; 01-13-2016 at 12:24 PM.
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post #8 of 43 (permalink) Old 01-13-2016, 02:20 PM
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Horses for courses... This is trotter, not a thoroughbred.

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post #9 of 43 (permalink) Old 01-13-2016, 02:31 PM
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Horses for courses... This is trotter, not a thoroughbred.

I'd beg to differ -- they are thoroughbreds that trot very nicely!
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post #10 of 43 (permalink) Old 01-13-2016, 02:45 PM
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Yes but no trotters that run a 1:40 mile! Its more fun to ride a slow bike fast than a fast bike slowly

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