Grinding The Throttle Stop For Wider Throttle - 2023 Honda CB125F 

BRO THE WAY U INSTALLED THE PHONE MOUNT IS GENIUS!!! I KEPT STRUGGLING WITH THIS BUT UR IDEA IS GENIUSS

Before grinding at it like that, it's worth just taking it off to see what's happening. Then you'll know if it opens all the way, how much further it _can_ open, and what the throttle position sensor will do if/and you get it opening further. Given she makes 4bhp under regulation, I don't think they would have deliberately made the throttle opening insufficient.

Best way to make it faster is an effective screen as at higher speeds pushing the air out of the wsy is the hard part, I fitted a faco short screen on my Suzuki Address 110 for improved comfort really. It only has 9bhp and was only capable of 55mph in neutral conditions yet with the screen it's 60mph so for the £60 cost that's an effective upgrade. Ask on some CB125F forums whst owners have experience of.

Doesn't sound like the engine is liking that at full throttle. I'm sure mine doesn't sound like that, sounds like resonance or something. Can't see you getting much more out of it. But good to see you trying, keep at it. Cheers

I believe that possibly these bikes are restricted on the injector. They use a 90cc instead of 125cc injector. Have you looked into this.

Is it possibly slower I don't know I don't ride it lk

Have u checked if the airbox mod results in more fuel consumption?

Nick destroying his bike bit by bit 😅

Maby a bad move I would of taken your air box off and pulled the throttle and looked down first and checked I can't emagine them restricting the throttle but hey you never know

wouldn't work, the stop prevents overstressing on the spring. The actual throttling is done by the ECU.

2:06 , any petrol thief could steal petrol easily and if rat cut those rubber pipes its problem, why honda didn't think about that?

Take the choke out that restricts the air I know it dose I take the choke off all my bikes

Here is what I would recommend mate, if you are mechanically capable, and ready to become a bit more intimate (in only the most wholesome way of course) with your bike. I recommend getting a workshop manual so you can get familiar with a task before undertaking anything, it will also help make sure you torque your bolt and nuts right. The last bit isn't as crucial for this, but still handy none the less. First off: Looking at a workshop manual, you will need to remove the seat, fairings, fuel tank, fuel filter and the airbox. This will enable you to have a look at the throttle body in action on the bike. Then using the handlebar throttle, fully open the throttle. Look at the throttle body pivot where the throttle cables go, and check where it stops, then check the butterfly flap. You'll be able to tell if there is any restriction to flow, and incase your modification may of made it go a little too far. From there you can make adjustments, repair, replace, or further modify. Don't be afraid to make mistake or ask for help, the motorcycle community has a long history of modifying motorcycles. Secondly: It harps a little on the maintenance, but seriously! Keep your your bit that are supposed to be moving their proper lubrication. Keeping everything well lubricated is not only a performance thing, but a safety thing. Also check your fuel filter and air filter, and replace as needed. Oil is important too, from cylinder walls and valves, all the way to your clutch and transmission, are using that oil. You could also try using a fuel system cleaner, if any of your injector has any clog it should help clear it. Sorry, sorry. I'll stop the sales pitch. Third: There is bond to be many forums with mixed results of people modifying their bikes, from performance to touring. Forth: ECU flashing, it can get quite expensive. Fifth: Engine swap. Forget expensive, try downright tedious and expensive. Sixth: Modifying the engine with performance parts. Not sure how large the market would be for the CB125F though. But this path is if you are very mechanically inclined. If you need any more help, don't be afraid to ask. Keep it rubber side down.