I was reading on another forum someone had made and tested a custom ecu, I just bought my cbr125, I am currently ripping it apart for some custom metal flake paint, but I am in desperate need for a bit more power...

 

Honda did an amazing job optimising this engine. There's really nothing you can do that will give significant enough power-boost to be worth it. Options would be:

- best: engine-swap to another factory engine with more power, 175 or 250. Be sure to get entire harness and matching ECU

- easiest: nitrous. Be sure it's wet system with programmable controller

- most flexible: turbo. Can get +50-150% more power, depending upon how much you want to spend.

 

There was a guy believe his name is Mike Miller, he is from cbr125world, back in 2015 he made a customer ecu and programmed it. From what he said it sounded absolutely game changing in combination with the common mods, plug, front aprocket plug and wire set and a carbon fiber clutch. He was planning on making it something he could sell but I never read if it ended up going for sale

 

It's easy to flash ECU or replace with easily programmable EFi system like Microsquirt. Then you can dyno-tune to reduce excessively rich WOT mixtures and increase ignition advance for use with high-octane petrol. You can expect +5-10% more power from this. Not as much as other brands because Honda did really good job and it's difficult to improve.

 

A CBR125 is about 13hp - even if your investments in a new ECU and tuning gave you 20% increase (highly unlikely) - you'd be looking at less than 16HP.

A stock CBR300 is over 30HP. A CBR600RR is over 110HP.

Keep your bike stock and in good condition, think about resale value, ignore the voice in your head which tells you to pimp it out - and save your money for a bike that actually has more power.

You're chasing go-fast stripes...

 

I just need that little bit more to get me to say 120kph, 60mph. I don't need much I just have a 15 km stretch of highway and there is no way around it. I don't need 200mph,

 

Probably easier to lose some weight yourself - the bike is pretty much optimized out of the factory.

 

I am a lean 175 I don't wanna lose weight lol there are videos with guys doin120, it's not far fetched