Grinding The Throttle Stop For Wider Throttle - 2023 Honda CB125F

Автокөліктер мен көлік құралдары

In a desperate attempt to try and get better performance out of my bike's top end, I decided to take my dremel to the throttle body of my Honda CB125F to try and get the throttle to open just a little bit wider in the hopes that I can improve the performance and more reliably hit 100km/h.
Unfortunately I broke the grinding disc on my dremel before I got as far as I was hoping, but have I done enough to make a difference?

Пікірлер: 67

  • @WhippyWhip2
    @WhippyWhip221 күн бұрын

    Nick destroying his bike bit by bit 😅

  • @NicksBikes

    @NicksBikes

    20 күн бұрын

    @@WhippyWhip2 Gives me something to fix later 😅🤣🤦‍♀️

  • @Motorizedstuff
    @Motorizedstuff21 күн бұрын

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

  • @caveyful
    @caveyful21 күн бұрын

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

  • @Motorizedstuff

    @Motorizedstuff

    21 күн бұрын

    It will use a little but it will only be a little bit very small amount

  • @NicksBikes

    @NicksBikes

    21 күн бұрын

    @@caveyful I haven't noticed any difference for better or worse

  • @shanekaye2918
    @shanekaye291819 күн бұрын

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

  • @NicksBikes

    @NicksBikes

    19 күн бұрын

    @@shanekaye2918 No, but that's a good idea. But if everything else on this bike is an indicator, there's probably not another single part that fits this engine 😅

  • @Motorizedstuff
    @Motorizedstuff21 күн бұрын

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

  • @NicksBikes

    @NicksBikes

    21 күн бұрын

    @@Motorizedstuff what choke????

  • @BlokeOnAMotorbike
    @BlokeOnAMotorbike18 күн бұрын

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

  • @NicksBikes

    @NicksBikes

    18 күн бұрын

    @@BlokeOnAMotorbike I was wondering if the ECU had any control over the throttle position

  • @mariokuppers5686

    @mariokuppers5686

    5 күн бұрын

    @@NicksBikes Not really. The restriction comes via fuel pump, The ECU is Hard restrictet by indicatet Speed of 115 and cuts than hard the fuel in the moment where it jumps to 116. It doesn´t matter how you sprocket it and it doesn´t matter how high you are in revs 115 to 116 happens the fuel cut. Except you reflash the ECU is no fucking way in the whole wide world to get the JC84 over 115 indicatet Speed wich is 105 in the real world. The Engine is for sure capable for more. The only thing what you can try is the ECU from the JC74 the Engines aren´t so much different but different enough to make it 2 driving Experiences on its´s own with the counter shaft in the Old Engine. That ECU hasn´t an restriction in it or the JC 74 isn´t fast enough but i got mine so far to 128 indicatet and revs end of the redline and i know for sure that you can even re sprocket the bike to go even faster. Indicatet Revs should be true but 128 is only 112-113 real world

  • @Motorizedstuff
    @Motorizedstuff21 күн бұрын

    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

  • @ripmax333

    @ripmax333

    21 күн бұрын

    That's what I had in mind too, I would have pulled the airbox out and checked if the throttle butterfly flap was actually restricted , personally I cannot see any reason Honda should do that on a 125cc, but as you said, you may never know😅

  • @Motorizedstuff

    @Motorizedstuff

    21 күн бұрын

    @ripmax333 yeah the butterfly flap is the choke he can take that out makes a difference in sure I do it to my bikes everyone of them

  • @NicksBikes

    @NicksBikes

    21 күн бұрын

    @@Motorizedstuff dude this bike is fuel injected it doesn't have a choke

  • @Motorizedstuff

    @Motorizedstuff

    21 күн бұрын

    @NicksBikes ahh yeah they don't they have something after the carburetor but I have never looked at how they work

  • @Motorizedstuff

    @Motorizedstuff

    21 күн бұрын

    That the thing with everything electronic can't change nothing

  • @technodojo438
    @technodojo43820 күн бұрын

    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.

  • @technodojo438

    @technodojo438

    20 күн бұрын

    Just had a quick look at your videos mate. You got this.

  • @NicksBikes

    @NicksBikes

    20 күн бұрын

    So far I've found the aftermarket for this model CB125F to be virtually non existent to the point that I can't even find sprocket options for this bike. The 420 chain makes it difficult and the proprietary rear sprocket makes upgrading to 428 chain impossible. I've heard someone claim that the ecu is shared with the Grom, so a Grom tune could be a possibility, but I haven't deep dived to find out if that's true. I've just ordered an OBD2 adapter so at least I ought to be able to see throttle percentages like I can on my 390 Duke (Incidentally, the throttle is stopped at 85%!) so I won't go any deeper until I can confirm throttle position in the ECU. All I really want is to be able to more reliably hit 100km/h, as it sits, it's happy at about 93km/h but really struggles to do anything above that.

  • @technodojo438

    @technodojo438

    20 күн бұрын

    @@NicksBikes It should already have 428 from factory, I could be mistaken though. The Grom and CB125 family are built with a different purpose in mind, while the plug may be interchangeable it could effect the engine in unforeseen ways. I personally wouldn't do anything like that with spare known working electronics that could be damaged. OBD2 scanners are becoming one of the handiest tools you can carry these days. I am definitely surprised by the 15% reduction, they could be only doing that whilst you are at low speed. If you get an OBD2 scanner that also can do logging recordings (since I wouldn't recommend having a laptop out or even watching the mobile whilst riding. Random question, but I am going somewhere with this. Have you ever ridden in the rain?

  • @NicksBikes

    @NicksBikes

    19 күн бұрын

    @@technodojo438 I'm an all weather rider. I've even ridden on icy roads, granted it was very slow going. I take this bike on dirt as readily as I do sealed roads. I've called B.S. on reviews on this bike that say "skinny tyres have no grip" because I've found these stock tyres to be extremely reliable in all conditions. I've felt the wheels slip and the bike wobble but the only crash I've had so far was when I was on dirt (in the rain, incidentally) and I hit a patch of deep dust that I misread as solid track and twisted the throttle as I hit it. Got it on video at least 😅 Yeah, this model has a 420 chain. It's stupid. It's almost entirely different from the preceding model except for the shape

  • @technodojo438

    @technodojo438

    19 күн бұрын

    ​@@NicksBikes damm, youv'e got my attitude "the only thing that'll stop me is a bad attitude". One of my jobs is at a tyre shop, I wouldn't recommend changing the tyre size, Honda is very smart with what size that will best suit the needs for their bike. Skinner tyres enable you to get tighter turns with less lean on the bike. If you go to a wider tyre, especially with the stock wheel, then the tyres bead may not seal properly. Also you will want to keep at least a centimeter clearance after the larger size. If anything have a look at duel compound tyres, hard rubber in the center for tyre life on the straights, and softer rubber on the sides for nicer grip in the corners. The stock tyres have plenty of grip for the majority of riders. Damm, that sucks. I'll do a bit more research for you mate. When you rode in the rain, did you get much water on you while you were at speed?

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