More Speed for the Honda Trail 125!
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- čas přidán 8. 06. 2024
- More speed takes more power, so we install a Yuminashi big bore kit on our Honda CT125.
0:00 Intro
1:32 Teardown
4:29 Checking Ring Gap
5:43 Piston Assembly
6:40 Engine Reassembly
10:29 Fuel Injector
11:08 Buttoning Up
12:00 Wideband 02 Sensor
15:13 First Start
16:15 Road Test
#ct125 #trail125 #hondamotorcycles - Auta a dopravní prostředky
I watched the whole damn video….and I don’t have any intention of owning a Trail 125 much less modding one. Very soothing voice and detailed easy to understand explanations. 👍👍
Thanks!
Great video, as a kid I worked on these single cylinder Honda’s. They sure take a beating, great camera work. 🤓
Looking forward to seeing your approach to tuning this thing
Dude this was excellent. I appreciate the info about what can happen when things aren’t as they should be ie piston ring gaps causing seizing. Provides a lot more context for me as a hobby mechanic
The Yuminashi kit includes ZERO instructions, so I definitely had to rely on some prior experience with the ring gap.
Great illustrations of the upgrades
👏🏼 👏🏼 👏🏼 dude, appreciate the detail. Thanks for sharing!
You bet!
Excellent job Mate!
Excellent video, thank you very much!
very nice video and well done ! thanks !!
Awesome video ❤
Great video even if it didn’t end up quite the way you wanted.
i just subscribed to you now i need to go back and watch your videos so i know what you did wrong and did to fix it. so i can do it right the first time. I HOPE. lol thanks i wish i had found your channel a couple months ago.
great video thanks
Great video. Really helpful and visually detailed. I probably will do this on my 2021 Trail125 by this summer.
And thank you for showing the wideband sensor result, because of that, I changed the fuel injector order from 170 down to pcx155 on my Yuminashi's shopping list.
I hope it will make my Trail run less richer. What do you think?
I think the 150cc is still too rich with the stock intake and exhaust. I'm still tuning and waiting for some warmer weather to do some extended riding and get the engine hotter, so I'm not ready to share a recommendation just yet.
The installation appeared straightforward until it came to filing the rings, which I wouldn't be capable of handling. I assumed it would be a simple install-and-ride process. Moreover, riding at high speeds, such as 60 mph, on a small bike seems perilous without larger tires. I appreciate the power for hill climbing, similar to the CT110 that featured a sub-transmission, allowing it to traverse any terrain.
Very rare to find an interesting video these days. Don't know how people can be so boring and think they are the greatest.
Don't know why I'm watching this video, as this is something I did more than once, a sign i enjoyed the video.
You're absolutely right about going higher on cc brings more issues. I installed a 181, and guess what? Installed the original 125cc back and never again had another issue with it. Kept the piggyback ecu for the high RPM camshaft though.
By the looks of it, you're also having problems with yours. I took mine to the dyno, 13hp. And I still brought it back to original cc due to the constant issues. The worst of all was stock bikes not only keeping up with mine, but also overtaking me. That was not funny.
What kind of issues did you have with the 181?
@@ozarkgarage lack of power at high RPM. Difficulty starting some time after installing it. Don't forget the little detail it will chew 420 chains.
I find this interesting, i would have changed the gear ratio before the engine for going on the road, it also defeats why they call it a trail 125 bike. If anything i would have shorten the bikes gear ratio for acceration and torque by the rear aftermarket sproket to just to closly match the 1977 honda ct 125 trail bike with a 53 teath rear sproket for trails, back roads, and neighborhood riding to grocery stores. But i also know everyone has there own purpose for it.
I know this because find parts parts for the '77 is like fishing for needles in hay stacks. I had to learn every inch of my grandfathers bike to fix it. its got a top speed of 30 mph, it was imported by japan only in '77 to america. And it was mostly bought by the goverment / forest service and advertised to the public for a farm bike.
I did some research on swapping sprockets and with the ABS, it seems a mismatch between the front wheel sensed speed (ABS tone ring) and the rear wheel sensed speed (via engine RPM) causes an ABS error and the light to kick on and disable the system. This bike is for a new rider, so I wanted to keep ABS intact.
I have a green mean stock machine 2023. In 1966 had a Honda Super 90. It was beaten up by the delta phy fraternity at Edison High school Fairfax county VA.
I rebuilt it fought of the hate. If I had your video in the day...
Really was a well presented video.😊
I look forward to the CBR300 swap 😅
fuel consumption increased ?
More power takes more fuel unless you have some magical gains in efficiency. It will likely be in the neighborhood of 20% increased fuel consumption.
You'll need a bigger tank too😂
Seems a lot of work and expense for what? 4 or 5 mph?
I'm less concerned with top speed as much as speed loss going up hills. On 2-lane back roads, dropping to 45-46 mph on a hill is not only inconvenient, but also unsafe. If we can get a 15% increase going up hills (displacement was increased by 14.4%), that will be 52-53, which is a lot more reasonable on a 55mph back road. In the next vid I will show some before/after footage and see if we achieve the desired results!
I don't know what was the expected power (probably about 14% more, just like the displacement) but do you know this would only increase the top speed of 4.5% ? This is definitively useless, in my opinion.
TORQUE
Why not just buy a more powerful "adventure" bike that can keep up with highway traffic? Same situation as a motorized bicycle guy wanting to go 50mph, just buy a used Trail 90.
You gotta do the exhaust dude you can’t just do a big poor kid and take a bigger breath and without being able to exhale it all
Trying to keep it from being a LOUD bike, but never is a long time...
I did this same thing to my ex wife and she was NOT happy about it.
I don't understand why people buy these then scream how can't go on highway and proceed do all kinds stupid expensive mods . Yeah these where never designed go at highway . Get the right tool for the job. The new honda xr150 is cheaper than a trail 125. used bikes from honda xr125 t0 250, nx 125, nx250 , kawasaki klr250, yahma xt225 xt250 tw200 are all cheaper than a new trail 125. Get the right tool for the job, then save yourself money and not have to do mods.
Hi, came over this video because I own a couple of Skyteam / Honda Dax 50cc and both are upgraded, one to 140cc and the other to a racing z155cc. That exhaust pipe inner diameter is 16mm on the Honda Trail 125cc - That is too tight, I have 28mm on anything greater or equal => 125cc or the airflow will suffer and the HEAT increase... Maybe a little tip, maybe increase the outlet pipe diameter!?
Cool bike, but my Daxes rules... Cheers :)
I've thought about increasing airflow via exhaust, but I'm trying really hard not to turn this into a loud bike. I already have enough of those!
@@ozarkgarage I see. I did it for the heat, so the engine / outlet isn't gonne reach too high temp. I chopped the exhausts muffler part and welded on the 28mm pipe - almost same noise, more airflow and less heat!
But like I said, an upgrade from moped 50cc to 140 and 155z engine = needs more air.