143 Takegawa cyl install.

[ByteOfTheCherry]

How is it running? Do you think the EFIE mod is necessary on top of the larger injector to get it near the proper air fuel ratio?

 

[ByteOfTheCherry]

Any chance of pics of your

Thinking about it why did you not choose a 170/180 kit with the 'mild ' cam...no substitute for 'cubes'...???

Any chance that you took pics of your EFI connections, that's where I'm unsure...the webike picture of the Takegawa kit does not clearly illustrate the cable end of the unit.

 

[m in sc]

you cant control the fueling on these like the groms & monkeys, different ecms. Dynojet, or anyone else, doesnt make anything to interface with the new style ecm on these as of yet. its totally different. the eife system doesn't allow for enough to handle that big of a change, you need to start getting into the timing tables. If you look on here, i layed out how i wired that unit in. its easy. But not in this thread. look for the cam thread. I mean, maybe if you ran a stock TB and a low compression kit? meh. yes, you need a bigger injector. also, the crank in the trail motors is different, and the clutch wont take it. also, you need to get a bigger throttle body to make it work right, etc. I went way, way down the rabbit hole with my 1st gen grom with a 170 4v kit, power commander etc. you name it, i had it. even fabbed up my own stainless high exhaust. so, you can say i've been there/done it. It would also do (legit) 95mph. It now has a 250 s stroke motor in it. Wasn't looking to go that far with the trail by a long shot. its just an errand runner/commuter for me. also, prepare for the old farts to bash you on how its fine putting along at 25mph stock.

 

[dmonkey]

Takegawa does sell a 143cc kit with their FI-CON TYPE-E fuel controller which works with the CT125 ECU (at least the JP one, you could be the lucky early adopter to confirm whether or not there's any differences there). It is not plug-and-play, requires tapping wires to the ECU, instructions are in Japanese.

 

[m in sc]

true, you make a good point. but ive not seen it confirmed on a us model yet. however, i looked this IS the right connector for a trail. (this wasnt on there a month ago) http://www.takegawa.co.jp/products/detail.php?product_id=4625&category_id=2323

 

[AZ7000']

I very much dislike goaz who did the work but this looks cool/dangerous…

2015 Honda Grom Swapped - motorcycles/scooters - by owner - vehicle...

2015 Honda Grom, had only 60 miles, then swapped CBR 300 engine -Brembo brakes -Rox Risers -Brand new tires -Swap done by Go AZ Scottsdale -XSR 900 Headlight Serious buyers only. Thanks

flagstaff.craigslist.org

 

[m in sc]

300 grom swaps are pretty common. I don't get it adds so much weight.

 

[ByteOfTheCherry]

Takegawa does sell a 143cc kit with their FI-CON TYPE-E fuel controller which works with the CT125 ECU (at least the JP one, you could be the lucky early adopter to confirm whether or not there's any differences there). It is not plug-and-play, requires tapping wires to the ECU, instructions are in Japanese.

Jeeezzz...!!!...I'll wait for a plug 'n' play

 

[tuff tunica]

M in SC, Wondering if you have an update for your 143 BBK install? I'm thinking about doing this same mod. Looks like both Webbike and Hard Racing have de-listed the Takegawa 143 kits for the CT125? They may have been seeing many of the same issues you initially experienced. There is a local machine shop that can hone the cylinder for me so I'm not too concerned with this slight change as long as everything else seems to be fine. Also, do you have a link to the EFIE module you installed?

Thanks in advance.

 

[ByteOfTheCherry]

M in SC, Wondering if you have an update for your 143 BBK install? I'm thinking about doing this same mod. Looks like both Webbike and Hard Racing have de-listed the Takegawa 143 kits for the CT125? They may have been seeing many of the same issues you initially experienced. There is a local machine shop that can hone the cylinder for me so I'm not too concerned with this slight change as long as everything else seems to be fine. Also, do you have a link to the EFIE module you installed?

Thanks in advance.

I think I bought the last 143 Takegawa cylinder/piston kit from webike..I too have access to a machine shop so can make it fit, waiting for a 'mild' E15 cam and the plug 'n' play Efi which is scheduled for Jan 2022. I'm U.K. Based so bought a Thai CT125 Grey import as Honda won't do officially into Europe.

FYI cost approx. equiv. $6000 U.S.(on the road) and already spent about another $700+ on 'goodies'

 

[m in sc]

the 143 is fine. TBH, i didnt care for the lack of oil holes in the piston, so added some to the top of the skirt of the second one, just 3 1.5 mm holes about 4mm under the oil ring land. it was 'ok', so on a lark i bought a yuminashi 143 kit because it was DIRT cheap, and the piston is much better quality, at least in design, so now that's in there. runs really well, still gets over 96 mpg. However, i did swap the cam back to a 1st gen grom cam, which is advanced a bit on timing, and less duration, so it has better down low performance. I'll probably put in a takegawa low end cam down the road.

in the middle of all that, I did play with a drow sports high compression 125cc piston on use with a spare stock msx/grom cyl i had, and that performed really well also.

Yeah, i like to tinker a bit.

below are pics of the 2 brands of piston. Im by no means a big yuminashi fan, but they def did better on this one then takegawa.

 

[tuff tunica]

the 143 is fine. TBH, i didnt care for the lack of oil holes in the piston, so added some to the top of the skirt of the second one, just 3 1.5 mm holes about 4mm under the oil ring land. it was 'ok', so on a lark i bought a yuminashi 143 kit because it was DIRT cheap, and the piston is much better quality, at least in design, so now that's in there. runs really well, still gets over 96 mpg. However, i did swap the cam back to a 1st gen grom cam, which is advanced a bit on timing, and less duration, so it has better down low performance. I'll probably put in a takegawa low end cam down the road.

in the middle of all that, I did play with a drow sports high compression 125cc piston on use with a spare stock msx/grom cyl i had, and that performed really well also.

Yeah, i like to tinker a bit.

below are pics of the 2 brands of piston. Im by no means a big yuminashi fan, but they def did better on this one then takegawa.

Thanks for the quick reply. I'm considering the bigger OEM Honda cylinder with (at least now) the Yuminashi piston. I'm more interested in lower end power as I'll be riding mostly off road. I live in Utah and this bike sits in Moab. (I hope you may be familiar with Moab, UT). Although I will be taking it to Death Valley for a trip mid January. Hoping to get the mods completed prior to this trip. Which cam would you recommend for this purpose? Also I'll probably put on a Yosh full exhaust. The BBK, cam and exhaust should provide a bit more umph without compromising the longevity of the engine.

Did you use a fuel management enhancer? I read somewhere about a mod where they installed an EFIE unit. My computer updated last night and I can't find that thread now. Arghh! The EFIE was paired with the Honda PCX150 injector, which I guess allows for a bit more fueling.

Thanks again and any advice is appreciated.

 

[m in sc]

thats the exact setup I have. its on this site as well. as far as the cam I'm not 100% sure as I haven't tried a low end one yet.

 

[tuff tunica]

thats the exact setup I have. its on this site as well. as far as the cam I'm not 100% sure as I haven't tried a low end one yet.

Thanks again for the reply. So did you use the EFIE unit on your bike?

 

[m in sc]

yes. currently set to 25mV and rode it in today to work, actually. was rolling along on one flat road at about 52mph at a hair over 1/2 but under 3/4 throttle. I might actually go down 2 on the rear or up one tooth on the front sprocket, as it maintains speed really well in the mid range. will just need to fit a speedo healer. It should hold the power well as its still in the 'fat' part of the torque curve. Off the line its MUCH improved over stock and low end is really good.

 

[tuff tunica]

Do you have a link for the EFIE unit that you have? I know there are several available. Thanks.

 

[m in sc]

TB Cam & EFIE

This is a failry popular mod on groms, installing a TB cam and some sort of fuel management. So, i will not be packing 100 lbs of racks accessories running lights and other stuff to my bike, i have 2 touring bikes for that. My primary use will be commuting in a suburban area and some light...

hondatrail125.com

there's only one type unit that i'm aware of from eagle research.

ELECTRONIC FUEL INJECTION ENHANCER (EFIE) DEVICE

SKU ER1-D1-0020 • 0.4166 lb / 189 gm ISBN 1-895882-32-X • 8.5 x 11 Important: Regardless of what you read elsewhere, we have discovered that the EFIE works on ALL types of oxygen sensors, including Titania (varying resistance) sensors, A/F sensors and wideband sensors. More details are in the...

eagle-research.com

 

[chuckklr98]

How did you decatt the exhaust?

 

[m in sc]

was back in July:
I made a new head-pipe. its also a larger diameter. (2mm or so).

cut fitting off stock head pipe, opened up on lathe, welded onto new tube:

below pic is just tacked together so i could test fit.

however, you 'could' cut the original cat open, take the mesh out and reweld it if you want to be sneaky about it. Its hard to see in the pics, but i also eliminated one of the 90 degree bends under the motor, and the long run up under the stock pipe where the cat was, is to help with scavenging.

I also removed the inside of the final spark arrestor tube in the cap. just took endcap off, cut the pipe off that poked into last chamber, deburred the edge, and put the cap back on. looks stock, still quiet, def flows better.

 

[chuckklr98]

was back in July:
I made a new head-pipe. its also a larger diameter. (2mm or so).

cut fitting off stock head pipe, opened up on lathe, welded onto new tube:

below pic is just tacked together so i could test fit.

however, you 'could' cut the original cat open, take the mesh out and reweld it if you want to be sneaky about it. Its hard to see in the pics, but i also eliminated one of the 90 degree bends under the motor, and the long run up under the stock pipe where the cat was, is to help with scavenging.

I also removed the inside of the final spark arrestor tube in the cap. just took endcap off, cut the pipe off that poked into last chamber, deburred the edge, and put the cap back on. looks stock, still quiet, def flows better.

Where is the catt located on the pipe? I don't have a lathe, nor the the skill to do what you did, but could cut it open and empty it out. I also took out the screen on the spark arrester.