The Honda PCX / Forza / ADV150 / SH Forums

Hello everyone, first timer so nice to meet you all! Owner of a 2015 150cc since a good week now and really liking it so far. I have a question about roller weights.. My second hand pcx came with a non stock variator and two different roller weights, 12.5 and 10.5 gramms. The 12.5's make the pcx pretty fast from the start and the 10.5's, which are installed now, even seem a bit faster, however.. I wouldn't know how a stock pcx drives..
My question is, am I doing my pcx any harm with these roller weights? I think I read somewhere that the pcx in europe originally comes with 19 gramm weights? A quick acceleration is fun of course but I am wondering if I'm pushing limits here. Any helpful insight is highly appreciated!

ps.. I mostly drive in and around the city so acceleration is more important than top speed to me

You’re fine… All you’ve done is move the power band around to give you a little bit more acceleration. For a PCX 150 most people here have found the sweet spot to be the 13 g roller…

That’s good news, thank you

Does anyone know the "sweetspot" for the new 4 valve engine? the 157cc KF47 lowest roller weight without loosing top speed? Also stock size? dimensions and gram weight?

I run 10.35g weight average. Get Great acceleration and retained my Top end 75+.

NCY variator, Dr pulley sliders.

Does anyone know what size rollers a 2019 pcx 150 comes with stock?

mop3d wrote: ↑Fri Sep 23, 2022 9:38 pm Does anyone know the "sweetspot" for the new 4 valve engine? the 157cc KF47 lowest roller weight without loosing top speed? Also stock size? dimensions and gram weight?

While I can't answer this directly, I can tell you that I went with 18g Dr. Pulley sliders on mine. Noticeably quicker off the line and 2 mph gain on top end. Was looking to maintain 70 without bouncing on the rev limiter (71 top spd). Stock variator and Puig windscreen.

I have a pcx150 2016 stock standard. What rollers without changing variator would you suggest and would I get a little bit more top speed.

Try 12-14g, either standard or Dr. Pulley brand. Be sure to also replace the slides in the variator also.

Stollies wrote: ↑Sat Jan 06, 2024 3:41 am I have a pcx150 2016 stock standard. What rollers without changing variator would you suggest and would I get a little bit more top speed.

You are not going to get much more top speed by just changing the weights. Changing weights only changes the shifting speed of the variator. You need a different Variator to get taller gearing for higher top end.

You might get an MPH or 2 by switching to Sliders but if you are already opening up the CVT, change the Variator.

mop3d wrote: ↑Fri Sep 23, 2022 9:38 pm Does anyone know the "sweetspot" for the new 4 valve engine? the 157cc KF47 lowest roller weight without loosing top speed? Also stock size? dimensions and gram weight?

Stock is 19grams.. You can use 18grams its good if lower the pulley dont have enouf weight for press up the belt.

I found the solution, the fastest you will get with a stock KF47 157cc Honda PCX160 engine. And it was absolutely painful to follow through.
Poor performing parts won't be listed.
Below is the reference links with some commentary.
I have never done a write-up or anything like this so advice is welcome.

I replaced the bulky restrictive intake box with a piece of hand trim radiator hose, the silicone inner lining is VERY smooth and held up well! highest quality I could find for any amount of money.
Intake replacement
https://www.mishimoto.com/classic/class ... EeB0aJocY8

This filter was the smallest that allowed enough air with wide open throttle that it didn't bog down or feel off around 9480RPM
Intake filter
https://www.amazon.com/gp/product/B0002 ... 0DER&psc=1

These are the rollers that matched my body weight (247lb.s) which the Rev limiter didn't kick in and tops out at 9480 RPM's (76mph)
Roller weights
https://drpulley.co/product/sliding-rol ... pYVJJmvDF6

This is a custom drive face meant to be used with the stock variator, and combined with the Dr. Pulley 15g slider rollers, the engine didn't bounce off limiter. Using the marker trick on the drive face and variator, This drive face allowed the belt to ride up to the variator edge, rounding it slightly.
Drive face
https://yuminashi.eu/speed-boost-drive- ... rio160-4v/

I actually found that replacing the stock exhaust resulted in significant weight reduction, with the 15G Sliders, the engine feels like it's in the powerband from the beginning of take-off. the 12G Carbon rollers was significantly quicker but I felt like throttle control is needed and ME LIKEY FULL THROTTLE. So 15G sliders was the peak optimum according to the butt-dyno. I actually did a lot of part combinations prior to killing the stock exhaust, because I know engineers optimize the exhaust specifically to the engine and they did a great job, And that's while I felt a wave of exhaustion( no pun intended) wash over me when I noticed enough of a gain in take-off and mid-speed(about 35-40mph) to realize I had to start over with every dang combination of parts again because of this new dynamic. Knowing what I know, I still kept the old stock exhaust just in case, because I got good results with it.

Exhaust
https://www.ebay.com/itm/165951491116
(Use any 51MM slip on muffler of your choosing)
OMG the 157cc engine thumps so hard you can feel it in your feet on concrete and in your chest standing behind it. Absolute beast.