The Honda PCX / Forza / ADV150 / SH Forums

IS your bike a Mk1 pre 2012 125 or Mk2 post 2012?

How far do you want to ride at 105 kph or 65 mph.

Uphill is different from the flat. Is Louisiana flat?

How much do you weigh?

Sorry to obsfucate.

J Costa is designed and set up to run with stock transmission components. If you add a Polini torque spring you will need to change the variator weights. Lots of different ones available and you can mix them to get small changes like 0.25 gms. You can also drill them out, carefully to make them ligh...

the variator is about the only thing that is the same for the 125 and the 150... just the weights are different. 65mph and extra, sounds too much for a 125 with only a variator mod. Stock Mk2 125 is good for at least 65 with a 100 kg rider and a bit more with a 75 kg rider. With performance variato...

Send me an email I will send you some printed test results. 125-130 but going down hill.

Thanks guys again. In the dealer they installed JCosta with 11gr or 10gr I think. A member from our forum told me that it was wrong and sold me the correct ones about 8.5gr. It really helped from 0-80km/h but after that it slows a lot... If I could get 120+ on flats easy... But no. 11 gms is correc...

I installed the JCosta in the dealer but I made the maintenance. I already installed the lightest masses or sliders. It came with heavier ones. My weight is 61kg. So I'm light. :D Should I install a slight stiffer contra spring for now on the stock clutch? It will help something? What weights do yo...

Depends on the angle of the hill? With a 5% hill you should be getting about between 92 kph and 102 kph depending on your weight. If the hill is steeper then you'll need to make some adjustment.

OP I sent you a PM if you send me an email address I'll send you the test results.

Is it a Mk1 or a Mk2 125? I am assuming Mk2? Did you buy and install the J Costa yourself? Or maybe you bought it and had the dealer install it. What weights are you using? The ones that came with it? How many Kms since you installed it? The 80 kms thing you can fix. Your friend is not telling you e...

Fuzzy washers are only required IF there is a shiny unused area at the bottom of the variator face. http://members.modernvespa.net/joe_bulva/uploads/dsc01176_170.jpg What fuzzy washers do it to lower the belt in the "groove" to lower the take-off or "first" gear. They were pionee...

Don't see any difference from stock but...

Mel,

$60 doesn't seem outrageous? Shock absorbers are quite heavy. If someone can tell us how heavy shocks are you can go here and find out how much postage is
http://www.thailandpost.com/rate.php

http://rzracing.nl/brands/yuminashi/progressive-double-valve-spring-racing-conversion-set-for-pcx125-genuine-head.html I found a yuminashi dealer but they are in holland. No worse than buying from japan though. 54 Euros !! :o Two sets of Sonic springs and retainers are $17.27. ;) All dimensions sam...

Hi, Sober this morning :lol: I wandered happily to Honda. They didn't have all the parts so PCX125 bits and the Sonic top retainer are on back order, ready on Monday. I'll probably go back Tuesday as the parts van arrives at 2.00pm. Here's what I have so far. http://i152.photobucket.com/albums/s170/...

So here is the RZ Racing link - you have to call or email him to ship to the USA http://rzracing.nl/honda-pcx-tuning/honda-pcx-125/progressive-double-valve-spring-racing-conversion-set-for-pcx125-genuine-head.html Here is the PCX Racing link http://www.pcxracing.com/product.php?id_product=13&id...

OK I just so you know all the quick 125 guys here use Sonic valve springs. Yes its a 125

Maddie,

I sent you a PM about the injector. If you want some Honda Sonic double valve springs let me know.

wingz wrote:Do floating valves also limit RPM? That might be what is happening.
Yuminashi said it is a problem with the stock springs.

Was reputed to happen to the Mark One 125. Use Honda Sonic double springs.

Nah. Just fuel tweaking. I always wondered if the old 125 had HP limiting not simple RPM as it sort of dies rather than stutter on the limiter.

Just a reminder that Dobeck in the USA Makes an AFR unit if anyone there is looking.

http://www.techlusion.com/GEN4/Gen4technology.asp

And you can adjust there controller on the fly using this device as the control buttons are on the unit.

My fuel economy keeps improving,im down to 2.7l/100km. I wonder if it has anything to do with Yuminashi valve springs i got installed recently. My top end power past 8000rpm is awesome all the way to the limiter. Its a good upgrade for the Pcx engine. Stock gearing? What's the speed at the limiter?...