The Honda PCX / Forza / ADV150 / SH Forums

The speed reduction is perfectly cyclic and uniform in frequency and amplitude. It never happens at 67 mph. It always happens at exactly 68 whether down hill or on the flat. I have experienced the eery feeling of hp balanced against the wind during top speed testing on my CBR250R. There is no cyclic surging. Only a random and natural interplay between the power and the wind. What I see happening with the PCX is definitely not like that. Too bad Honda didn't put a menu selection into the the screen to change the mileage into an occasional tach read out. Then we would know if I am at redline or not.

With 13,000 miles on the clock I don't get higher than 56-57mph top speed indicated (not gps, so probably slower - lorries overtake me now). This could be down to the belt getting near it's replacement at the 15k service.

Similar with mine, at 11000 miles its only doing 61mph indicated.
When new it did 67mph indicated.

edscoot wrote:With 13,000 miles on the clock I don't get higher than 56-57mph top speed indicated (not gps, so probably slower - lorries overtake me now). This could be down to the belt getting near it's replacement at the 15k service.

Pop a new belt and rollers in and I'll bet it'll be good as new

The reason I think the ECU limits by speed is, it goes the same top speed on the centerstand at max throttle as it does under load.

It's entirely possible it's limited by RPM or another measure though -- I'm by no means a Honda engineer, just a backyard mechanic speculating.

My PCX has the same symptoms as gn2 and edscoot too, my top speed is down from 61 to 59mph. Something else must be coming into play here...

One wonders where the ECU and speedo get their information from...?

gn2 wrote:One wonders where the ECU and speedo get their information from...?

The Dail Mail

AKA The Daily Wail.
I much prefer the Daily Mash
http://www.thedailymash.co.uk/

gn2 wrote:AKA The Daily Wail.
I much prefer the Daily Mash
http://www.thedailymash.co.uk/

Or the Daily (hate)Mail

I remember a study which concluded that reading The Wail on a regular basis was likely to induce stress and/or depression.
Not the paper for me, I used to read The P&J.

That Dail Mash is class. Ive already forwarded the NHS story

There's some real crackers in it, the Agony Aunt column is usually hilarious.

maddiedog wrote:The reason I think the ECU limits by speed is, it goes the same top speed on the centerstand at max throttle as it does under load.

It's entirely possible it's limited by RPM or another measure though -- I'm by no means a Honda engineer, just a backyard mechanic speculating.

My PCX has the same symptoms as gn2 and edscoot too, my top speed is down from 61 to 59mph. Something else must be coming into play here...

My top speed is 76mph about 122kmh.

All the pcx i know do more than 100kmh...

maddiedog wrote:The reason I think the ECU limits by speed is, it goes the same top speed on the centerstand at max throttle as it does under load.

It's entirely possible it's limited by RPM or another measure though -- I'm by no means a Honda engineer, just a backyard mechanic speculating.

My PCX has the same symptoms as gn2 and edscoot too, my top speed is down from 61 to 59mph. Something else must be coming into play here...

My top speed is 76mph about 122kmh.

All the pcx i know do more than 100kmh...

TasmanianDevil wrote:

maddiedog wrote:The reason I think the ECU limits by speed is, it goes the same top speed on the centerstand at max throttle as it does under load.

It's entirely possible it's limited by RPM or another measure though -- I'm by no means a Honda engineer, just a backyard mechanic speculating.

My PCX has the same symptoms as gn2 and edscoot too, my top speed is down from 61 to 59mph. Something else must be coming into play here...

My top speed is 76mph about 122kmh.

All the pcx i know do more than 100kmh...

Blasphemy!! You are going to start up the wrath of middle age dark times christianity priest who may burn you on the stake for claiming such things...Dont bother with which-craft video proof , thats just as bad and will not change their small mind ignorance thinking way. You will still buuuuurn...

But on the other subject,what have you done to yours to get it up there?

Cheers

Tasmanian devil where are you located? I get 106kmh indicated on my original 125.

Taz wrote:Tasmanian devil where are you located? I get 106kmh indicated on my original 125.

I'm on Portugal.

Once i reached 124kmh but it is hard to do.

I will make a vídeo for you. In Portugal there are many doing 75mph.

Pcxdemon wrote:which-craft video proof

You mean like a video where the speedo indicates 118kph which is proof of being able to do 127kph...?

Wheel bearings.......brakes.........tire size............

Many things on a scooter are not designed to run over a specified speed. You can hot rod anything you like
but perhaps your personal pilot should take this baby out on the roads and test it for you should your math
be off a bit.
LOL

TasmanianDevil wrote:My top speed is 76mph about 122kmh.

All the pcx i know do more than 100kmh...

Your speedo reads fast by 8%. Maybe 10%. What is the year and displacement of your PCX?