Kawasaki Z125 Forum banner

1 - 20 of 36 Posts

·
Registered
Joined
·
466 Posts
Discussion Starter #1
Do aftermarket companies make superchargers and tunes for small 125cc bikes? Will be interesting to see something like a supercharged Kawasaki Z125 tear down the street.

Or are these mods exclusively made for larger bikes only?
 

·
Registered
Joined
·
330 Posts
Yuminashi was popular among the Grom/MSX125 crowd. My guess is they'll jump at the opportunity to tap into the z125 market. For all we know they could be working on something right now or waiting till the market gets bigger for greater sales volume.
 

·
Registered
Joined
·
466 Posts
Discussion Starter #3
Just wondering. Seems like there's a huge aftermarket for 125cc bikes. People save so much on a cheaper bike so they have a bit more leftover to spend on other things than if you were to buy a more expensive and higher cc bike.

I see a lot of inertia power booster kits from Yuminashi but no super chargers. Or am I missing it?
 

·
Registered
Joined
·
330 Posts
Turbo kits are all i've seen from them so far, but with the perks that come with having super charger, there's bound to be something out already for the Grom
 

·
Registered
Joined
·
119 Posts
Probably not worth it to supercharge a low cc bike like the z125. From what I understand you need power to make power with a supercharger so a turbo may give the Z125 more boost.
 

·
Registered
Joined
·
330 Posts
Turbo is what I see a lot of Grom guys doing, that should say something right there, safe to say we found our answer.
 

·
Registered
Joined
·
119 Posts
Has anyone thought of adding a caburetor full conversion kit to the Z125? Yoshimura has one for the Grom so I can only assume that they'll release one for the Z125 too.
 

·
Registered
Joined
·
90 Posts
The cost vs benefit scale would have to be a killer for forced induction I would think on a bike like this right? You'd spend a buttload all for an extra 2 or 3hp I'd think and add a fair bit of strain to the standard engine and transmission?
 

·
Registered
Joined
·
9 Posts
I agree, FI is way better and easier. Carb tuning is so not fun.

Regarding performance gains, I think a good free flowing exhaust, airbox delete, and intake will have great gains for cost : performance ratio. I remember a thread on the hondagrom forums where they had 4 groms dyno before and after an intake and new exhausts. I bought the chimera intake on my grom and love it. Waiting for everyone to come out with their intake's before I decide. I can't imagine the route most of us went on the groms would be that different than the Zpro, but I don't want to assume.

The upgrading route most of us went that I knew:

Tires
Exhaust
Intake
Suspension (F+R)
Brakes + Brake SS lines
Cosmetics / Misc.

Found the link for the dyno runs:
Yamamoto SUS Titanium + Yoshimura Full Race Exhaust Dyno Pre/Post Chimera Intake
 

·
Registered
Joined
·
290 Posts
The Yoshimura carburetor will make a significant difference in HP and Torque and is easily tunable with jet and/or needle changes and mixture screw (assuming it has one).

Here's the Dyno results for a Grom

GROM/MSX125 Carburetor Conversion Kit & YD-MJN Carburetor | YOSHIMURA JAPAN

yc2.jpg

yc1.jpg

You'd definitely want to use gas/petrol that doesn't have any Ethanol in it or the pilot jet will gum up really quickly. Easy to pull the bottom off the carb and clear the jet, but still a PITA.

EFI is best for 99% of riding uses, carb is great for track use at fixed elevation. Once you move up in elevation by 4,000-5,000 feet the engine will lose power due to the fuel/air mixture being incorrect for altitude. EFI adjusts for this, carb doesn't. Full carb conversion package is around $600 USD....:surprise:

Here's an installation video for the Grom

https://www.youtube.com/watch?v=U7NhvDC4yJY&ab_channel=YOSHIMURA-TV
 

·
Registered
Joined
·
290 Posts
Daniel Crower Racing makes a cam for our bike thats good for +2 hp with a fuel controller. the cam is $300
That's another way to go, and keeps the EFI.

But don't forget the Fuel controller costs about $300, too.

If I were racing a Z125, for engine mods I'd probably go with a Yosh carb AND Yosh full exhaust, a BBK with high-lift cam, a fuel controller and AFR+, stiffer clutch springs, a quick shifter and a high performance coil and condenser plug wire.

Could hit 17 or more HP with one of the bigger BBKs.
 

·
Registered
Joined
·
3 Posts
I agree, FI is way better and easier. Carb tuning is so not fun.

Regarding performance gains, I think a good free flowing exhaust, airbox delete, and intake will have great gains for cost : performance ratio. I remember a thread on the hondagrom forums where they had 4 groms dyno before and after an intake and new exhausts. I bought the chimera intake on my grom and love it. Waiting for everyone to come out with their intake's before I decide. I can't imagine the route most of us went on the groms would be that different than the Zpro, but I don't want to assume.

The upgrading route most of us went that I knew:

Tires
Exhaust
Intake
Suspension (F+R)
Brakes + Brake SS lines
Cosmetics / Misc.

Found the link for the dyno runs:
Yamamoto SUS Titanium + Yoshimura Full Race Exhaust Dyno Pre/Post Chimera Intake
The Chimera Short Ram Intake is on Pre-Order right now.



https://www.steadygarage.com/store/...short-ram-air-intake-system-kawasaki-z125-pro
 
1 - 20 of 36 Posts
Top