Countershaft Change - Best speed for least effort.
Posted: Mon Sep 30, 2024 3:57 am
These details are for a 2014-2018 model PCX150.
Maddiedog put up a great post about changing the final drive gears.
https://www.hondapcx.org/viewtopic.php?p=61957#p61957
However, you don't need to press out the gears to make a big change.
By only replacing the countershaft sprocket (number 6 in about image), you can make big changes.
Here is a table of the speed changes for different gears.
You can see my driveshaft, counter gear, and final drive are the stock teeth number, but I only changed the countershaft to a 16T (tooth), and it gave me a 23% better speed (compared to Maddiedog's 25%).
This is the site I used https://www.yuminashi.eu/
and this is the product https://yuminashi.eu/countershaft-16-te ... 50-adv150/
I've had it running for 8,000km and just checked the sprocket. It still looks good.
You'll need to check any products against your scooter model number.
Importantly, I didn't do this to make the scooter a lot faster, but do reduce the engine rpm.
AT 120km/h on a flat road the scooter wouldn't go faster. You'll need to change the cylinder head for that.
This is a table of the changes in engine rpm.
Good luck.
Maddiedog put up a great post about changing the final drive gears.
https://www.hondapcx.org/viewtopic.php?p=61957#p61957
However, you don't need to press out the gears to make a big change.
By only replacing the countershaft sprocket (number 6 in about image), you can make big changes.
Here is a table of the speed changes for different gears.
- Excel File of gear ratio calculations
- Gear Ratios.png (48.38 KiB) Viewed 2925 times
This is the site I used https://www.yuminashi.eu/
and this is the product https://yuminashi.eu/countershaft-16-te ... 50-adv150/
I've had it running for 8,000km and just checked the sprocket. It still looks good.
You'll need to check any products against your scooter model number.
Importantly, I didn't do this to make the scooter a lot faster, but do reduce the engine rpm.
AT 120km/h on a flat road the scooter wouldn't go faster. You'll need to change the cylinder head for that.
This is a table of the changes in engine rpm.
- Engine rpm change
- RPM Change.png (6.87 KiB) Viewed 2925 times