The Honda PCX / Forza / ADV150 / SH Forums

From my experience fitting a washer doesn't affect your rpm,only lowers your gearing slightly for better takeoff...only way to increase or decrease your rpm is by adjusting the weights OR changing rear torque spring. Thank you. That sounds reasonable. I still need to try it to verify/disprove my th...

At this point, I wish to apologise and retract my earlier statement about minor changes in variator design being insignificant due the the rpm² relationship.
I have now figured out that a 0.5mm spacer can make a substantial difference in variator controlled rpm.

Regarding my statement about spacers... I have calculated that I need a 0.5mm spacer to raise my rpm to 8500. I know there won't be drawbacks because I measured the variator before and after fitting the sliders. Fitting the sliders moved the variator pulley half towards the outer pulley by 1mm (when...

I'm asking about inexpensive ways to increase the peak power of the engine.
I already know how I want to optimise the transmission.

I was enquiring about ways to boost peak power - not change the gearing.
As far as I know, there is no inexpensive power mod available but I would like to be proved wrong.

Getting all too technical here,lets keep it simple! Pcx either 125 or 150 or 170+ performs the best at 8000rpm without adverse fuel economy,regardless of what vario is in (yuminashi is not like a conventional vario as it has multiple angle face profiles so i cant speak for that one) ,its simple as ...

The more power you make the easier/earlier the weights get thrown out so you reduce mass to raise back up the rpm at which they are thrown out. Here's an analogy. You throw a baseball softly and it flies ten feet, then you add power/strength and you throw it 50 feet. Now switch up to a styrofoam ba...

So... installing the tach I found that at WOT accelerating in the variator from 15mph to 45mph im at 6900rpm with 12g weights. Am I testing correctly? How do others measure the rpms for weight tuning? Is that with the Yuminashi variator? Sliders or rollers? The size of the weights is also a signifi...

What is the most cost-effective mod to boost peak power by say 10%?

markz wrote:

Disclaimer: I pulled this graph out of my imagination and do not guarantee its accuracy.

I wish management at my job presented their shit with this disclaimer!

I should use it at work next time I present a graph.

So is the general rpm change 500rpm per oz? oz is 28g :D I would use: [target mass] = ([current rpm] / [target rpm])² x [current mass] This is not 100% accurate because the increased power caused by shifting the rpm would tend to raise the rpm slightly. In other words, you would likely get slightly...

Mel46 wrote:Not possible without modifications.

It seems some of them are accurate (even without modifications).

To my mind, the 18g vs 15g is because the PCX150 is more powerful than the PCX125. My PCX150 has 11.5g sliders at 7500rpm. 10g sliders would give me about 8000rpm. 9g sliders would give me about 8500rpm. I'm happy with the 11.5g sliders but am curious whether I'll get a significant improvement in ac...

rpm² is inversely proportional to mass, so minor variations are not worth worrying about.
If you want 40% more rpm then you need to halve the mass of the sliders/rollers.

you you wrote:It probably doesn't make the slightest difference over the time you own the bike

Hear, hear!

My 11.5g slider did not increase the RPM as much as I hoped but that's ok.
I tend to agree that 10g would be about right.

Mgalutia88 wrote:The seat is available from webike. It's an Arcadia Neu Dan Watt. They run $89.50. I have one in all black. It's really comfy.

Does it affect the size of the under-seat storage space?

dasshreddar wrote: I would definitely recommend trying a taller tire before buying a gear kit.

While that is much easier and has other benefits (and I am likely to do it myself), the 140/70-14 only provides 3% higher gearing over stock tyre.
That would increase my top speed from 113km/h to a whopping 116.4km/h.

Puig windshield. It will arrive on 6 Feb.
After that, something to make it faster such as the Yuminashi gear set or variator set.

Just as you said... Your opinion. Most exhausts don't add power, there are probably three of four that actually do and those add .75 to 1.5 hp at redline!!! Just like building a hotrod you need to match parts to make it worth your while. With my mods I have increased my top speed by 19% , average e...