Crazy to see how far you’ve come with this series! Can’t wait to see what you do next! I am glad you were able to make it to the highway, no more blisters hopefully!! 🤞🤞
A lot of 125s are 14/15bhp these days. Either Honda needs to up things with the motor, or put a standard 200cc motor in these. The idea of them is basically great.
Fuel octane.. higher octane produces more power .. prevents pre ignition.. England has Shell99 octane fuel .. always use it or BP highest octane ...worth trying
Please stop. You are looking quite stupid. Higher octane absolutely doesn’t make more horsepower. It only reduces the likelihood of detonation if you have too much compression.
These high compression engines really require high octane fuels. Detonation can be catastrophic! From a horsepower standpoint, high octane fuels allow higher compression ratio motors, which produce more power. High octane in a low compression engine won't increase power and might decrease power due to the flame speed.
i dont know what it is about my trail 125 but there is 5 with in 50 miles of where i live and they seem to pull as good as mine but when they top out about 57 mph mine will go to 64 mph and we all stock. don't get me wrong it likes 50 to 52 mph but it will run 64 mph on flat ground with no wind. so speed is not what i'm looking for. what i'm looking for is more power. but if i get more speed that will just be a plus. but please don't use axel grease to put the wrist pin and piston in again. buy some assembly lube. but great video
That is very interesting on your top speed stock. Mine could hit around 52 miles per hour on the flats without tucking. This was during 40 degree F weather so that can make a difference (cold air is denser and therefore has more resistance). The biggest problem I had was any wind or grade would just kill that speed down to around 45 mph. In general, with these Trails, you get more power in the low to mid range and not a huge bump in speed if you use the stock airbox. If you use an air pod filter, you lose torque at the low to mid range but gain power at the high end for better top speed. It is a trade-off and it is noticeable. As far as the grease, many suggested not using it and I have since changed. If you watch my video about adding an oil cooler, you can see the latest state of build with the stock airbox on the freeway. Speed for the most part held around 63 mph with a low of 58ish and a high of 68ish. Those numbers would have been more like 61, 67, and 72 with an airpod on there. I prefer, like you, just enough speed to hang on the freeway for short stints and increase or maintain off road torque.
Excellent. Mine would do 51-52 indicated and only about 45 if there was a headwind or grade stock. Ultimately, I was never trying for maximum speed but rather a constant 55 no matter the conditions. This was achieved. 70 mph is possible, if that were the goal.
Have you done anything to the head? What ECU are you using? Why don't I hear any mention of a Camshaft? Some items you need to think about and we don't use the oil cooler on our bikes here in Chiang Mai, Thailand. Install a temp gauge and you'll know for sure if you need the oil cooler....
The only thing I have done to the head itself is add a N15 Camshaft from Takegawa and adjust the valves as such. I also have a 28mm throttle body and intake to help flow air into the engine. I am using the stock ECU with an EFIE device from Eagle research as my "fuel controller". Since this video, I have installed a Opmid Multi gauge which does display head/oil temp from the stock sender. Oil cooler looks to be important once you get to 164cc so I now have one installed. I ended up bumping up the fuel injector size to 220cc/min in a later video along with a Takegawa drop in air filter (not the pod in this video) and it all seems to be a great setup. I will be doing a video on what my ideal 164cc setup is soon.
How does the the stock clutch handle the extra power I’m asking because I put a big bore kit on a Honda atc 70 and the stock clutch would slip if you romped on the throttle.
Around 51-52 miles per hour indicated on the speedometer which was maybe 50 miles per hour per GPS. I had stock gearing and tires at the time so the speedometer would over estimate the speed. I currently have a taller front sprocket and slightly taller tires so now the speedometer under reports speed.
With a 164cc big bore kit, it is highly recommended that an oil cooler is used. In my case, I am currently using extra fuel (running rich) to expel the excess heat. I have another video that goes through different fuel injectors to determine which ones keep the engine cool enough and which cause overheating. In the near future, I will be releasing a video with the installation of a gauge that includes engine oil temperature. That will help with determining what "safe" is without the need to bounce against overheat conditions.
Good going and great information. Would you mind putting together a budget build for this kit that can make the bike nearly as good? Like keeping the stock exhaust? or not having all the parts you added?
That is a really interesting thought. In general, the thinking is that the exhaust is the most restricted component from the factory, and therefore, you will get little, if any, gain with the stock exhaust in place from any other modification. Let’s challenge that for fun. If I have time this week, I will throw on the stock exhaust and give it a go with all my other mods and see what the result is. I will post the video to TH-cam if I am able. Then we can talk about how cheap you might be able to gain safe power.
@@QuantiQualification Thanks, an exhaust like yours is probably worth it and like you said a good way to gain power, so I'm open to getting one. So that leaves room for other things that will gain power for a good price and be effective. My goal at this point is to keep with the super cubs on the open road.
Why not just buy a 350cc or whatever can ride legally on freeways and easily keep up with traffic? A CT-90, etc., can almost keep up with most typical frenetic city traffic.
I like the dual spring rear and large built on carrying deck of the CT and its light weight, otherwise, yes. I recently picked up a Yamaha SR400 so that will be fun but possibly for a different purpose.
It lives!!! Nice layout of the parts. Thanks for sharing.
You are welcome! I am looking forward to posting some riding adventures this summer.
Crazy to see how far you’ve come with this series! Can’t wait to see what you do next! I am glad you were able to make it to the highway, no more blisters hopefully!! 🤞🤞
It has already been a fun journey! Stay tuned for the adventures that follow 😉
A lot of 125s are 14/15bhp these days. Either Honda needs to up things with the motor, or put a standard 200cc motor in these. The idea of them is basically great.
I agree. They obviously tuned it for maximum life but I think they could have gotten life and power out of the mill.
KTM enduro MX produced 35 bhp ..
@@manoftheroad55 Not fair 😉 Two-strokes rule!
I like the 200cc idea.
Fuel octane.. higher octane produces more power .. prevents pre ignition.. England has Shell99 octane fuel .. always use it or BP highest octane ...worth trying
Please stop. You are looking quite stupid. Higher octane absolutely doesn’t make more horsepower. It only reduces the likelihood of detonation if you have too much compression.
These high compression engines really require high octane fuels. Detonation can be catastrophic! From a horsepower standpoint, high octane fuels allow higher compression ratio motors, which produce more power. High octane in a low compression engine won't increase power and might decrease power due to the flame speed.
i dont know what it is about my trail 125 but there is 5 with in 50 miles of where i live and they seem to pull as good as mine but when they top out about 57 mph mine will go to 64 mph and we all stock. don't get me wrong it likes 50 to 52 mph but it will run 64 mph on flat ground with no wind. so speed is not what i'm looking for. what i'm looking for is more power. but if i get more speed that will just be a plus. but please don't use axel grease to put the wrist pin and piston in again. buy some assembly lube. but great video
That is very interesting on your top speed stock. Mine could hit around 52 miles per hour on the flats without tucking. This was during 40 degree F weather so that can make a difference (cold air is denser and therefore has more resistance). The biggest problem I had was any wind or grade would just kill that speed down to around 45 mph. In general, with these Trails, you get more power in the low to mid range and not a huge bump in speed if you use the stock airbox. If you use an air pod filter, you lose torque at the low to mid range but gain power at the high end for better top speed. It is a trade-off and it is noticeable. As far as the grease, many suggested not using it and I have since changed. If you watch my video about adding an oil cooler, you can see the latest state of build with the stock airbox on the freeway. Speed for the most part held around 63 mph with a low of 58ish and a high of 68ish. Those numbers would have been more like 61, 67, and 72 with an airpod on there. I prefer, like you, just enough speed to hang on the freeway for short stints and increase or maintain off road torque.
Nice . Real gold mine here thanks. I’ll definitely keep up with your vids!
Awesome, thank you!
Why not go with the largest available big bore? (186 cc, I think)
My stock trail 125 goes 55 (actual 57)
Excellent. Mine would do 51-52 indicated and only about 45 if there was a headwind or grade stock. Ultimately, I was never trying for maximum speed but rather a constant 55 no matter the conditions. This was achieved. 70 mph is possible, if that were the goal.
Have you done anything to the head? What ECU are you using? Why don't I hear any mention of a Camshaft? Some items you need to think about and we don't use the oil cooler on our bikes here in Chiang Mai, Thailand. Install a temp gauge and you'll know for sure if you need the oil cooler....
The only thing I have done to the head itself is add a N15 Camshaft from Takegawa and adjust the valves as such. I also have a 28mm throttle body and intake to help flow air into the engine. I am using the stock ECU with an EFIE device from Eagle research as my "fuel controller". Since this video, I have installed a Opmid Multi gauge which does display head/oil temp from the stock sender. Oil cooler looks to be important once you get to 164cc so I now have one installed. I ended up bumping up the fuel injector size to 220cc/min in a later video along with a Takegawa drop in air filter (not the pod in this video) and it all seems to be a great setup. I will be doing a video on what my ideal 164cc setup is soon.
How does the the stock clutch handle the extra power I’m asking because I put a big bore kit on a Honda atc 70 and the stock clutch would slip if you romped on the throttle.
The stock clutch will slip at lower rpms. I suggest either upgrading the springs in the clutch or avoiding full throttle at lower rpms.
What was the speed stock if you know thamks
Around 51-52 miles per hour indicated on the speedometer which was maybe 50 miles per hour per GPS. I had stock gearing and tires at the time so the speedometer would over estimate the speed. I currently have a taller front sprocket and slightly taller tires so now the speedometer under reports speed.
How and what criteria did you use to keep it in the "safe" zone???
With a 164cc big bore kit, it is highly recommended that an oil cooler is used. In my case, I am currently using extra fuel (running rich) to expel the excess heat. I have another video that goes through different fuel injectors to determine which ones keep the engine cool enough and which cause overheating. In the near future, I will be releasing a video with the installation of a gauge that includes engine oil temperature. That will help with determining what "safe" is without the need to bounce against overheat conditions.
Good going and great information. Would you mind putting together a budget build for this kit that can make the bike nearly as good? Like keeping the stock exhaust? or not having all the parts you added?
That is a really interesting thought. In general, the thinking is that the exhaust is the most restricted component from the factory, and therefore, you will get little, if any, gain with the stock exhaust in place from any other modification. Let’s challenge that for fun. If I have time this week, I will throw on the stock exhaust and give it a go with all my other mods and see what the result is. I will post the video to TH-cam if I am able. Then we can talk about how cheap you might be able to gain safe power.
@@QuantiQualification Thanks, an exhaust like yours is probably worth it and like you said a good way to gain power, so I'm open to getting one. So that leaves room for other things that will gain power for a good price and be effective. My goal at this point is to keep with the super cubs on the open road.
@@DearSX 👍
Here is the video I promised on the exhaust swap so you can see the difference. th-cam.com/video/bfUuZOw5C0c/w-d-xo.html
Why not just buy a 350cc or whatever can ride legally on freeways and easily keep up with traffic? A CT-90, etc., can almost keep up with most typical frenetic city traffic.
I like the dual spring rear and large built on carrying deck of the CT and its light weight, otherwise, yes. I recently picked up a Yamaha SR400 so that will be fun but possibly for a different purpose.