Yamaha YBR 125 Tuning , how fast ?

• Yamaha YBR 125 for sale on Ebay UK 

  Yamaha YBR 125 parts for sale on Ebay UK

Yamaha YBR 125 was not designed for speed , but for reliability and economy , which is why i bought one for , i have not fitted any of these parts to my bikes but they are are out there and i might do one day just for fun .

here is some that i know of probably lots more if you can add anything or have tuning information for the Yamaha YBR 125 then post below .

Yamaha YBR 125 Tuning: Can You Make It Faster?

The Yamaha YBR 125 was engineered for world-class reliability and fuel economy, not for breaking land speed records. However, if you want a bit more "punch" for your commute or a better exhaust note, there are a few paths you can take.

1. The Reality Check: Top Speed

In stock form, a healthy YBR 125 will typically top out between 65–70 mph (indicated on the clocks), depending on rider weight and wind conditions. Tuning won't turn it into a R6, but it can make the bike feel more responsive.

2. Performance Exhausts

Most owners change the exhaust for the sound and looks rather than raw power.

• The Benefit: A slight weight saving and a much better "thumper" sound.

• The Catch: On fuel-injected (FI) models, the ECU usually compensates for the change, but don't expect a massive jump in horsepower without other mods.

3. Big Bore Kits (150cc Conversion)

This is the only way to get a significant torque increase. 150cc kits are available and relatively simple to fit because the YBR engine is air-cooled and uncomplicated.

• Pros: Better hill-climbing ability and mid-range pull.

• Cons: Higher stress on the crankshaft and cooling system.

4. Fuel & Air Tuning

• Performance Chips: Some "Dyno-Boost" style chips claim up to a 15% BHP increase by tricking the ECU into a richer fuel mix.

• Air Filters: While high-flow filters (like K&N) are hard to find specifically for the YBR airbox, some riders modify the intake for better breathing.

5. Sprocket Gearing (The "Cheap" Fix)

If you want a higher top speed (at the expense of acceleration), you can change the front sprocket to one with an extra tooth. This drops the revs at cruising speeds, making the bike feel less "stressed" at 60 mph.

Obviously there is the exhaust not sure if these improve speed any but they look and sound a lot better .

Buy one here on ebay uk   

You can also get big bore cylinder barrels to increase bore from 125cc to 150cc

                                 buy them on Ebay UK here .

I have not been able to find any performance air filter for the Yamaha YBR 125 so if anyone know of
any link below in the posts please .


i did find this though during my search for info claim  15% bhp increase ?

DYNO-BOOST PERFORMANCE CHIP Yamaha YBR125 YBR250 YZF-R125 

buy on Ebay UK here