Differences between the new Yuminashi ECU and Finbro’s ECU ?
Close
Login to Your Account
Honda Grom Forum

Differences between the new Yuminashi ECU and Finbro’s ECU ?

This is a discussion on Differences between the new Yuminashi ECU and Finbro’s ECU ? within the Grom Performance forums, part of the Honda Grom Garage category; The non programmableYuminashi ECU is relatively new and not many have used it yet, but what are thedifferences between the new Yuminashi ECU and Finbro’s ...

Page 1 of 5 1 2 3 ... LastLast
Results 1 to 10 of 45
Like Tree15Likes

Thread: Differences between the new Yuminashi ECU and Finbro’s ECU ?

  1. #1
    Member
    This user has no status.
     

    Member #
    5761
    Join Date
    Jul 2015
    Location
    Everett, WA
    Posts
    64

    Differences between the new Yuminashi ECU and Finbro’s ECU ?

    The non programmableYuminashi ECU is relatively new and not many have used it yet, but what are thedifferences between the new Yuminashi ECU and Finbro’s ECU?


    According to the internet -

    Both are modified/reprogrammed Keihin ECUs and are “selflearning” using the stock narrow band O2 sensor.
    They both can be used with modified or big block motors byusing a larger fuel injector.


    Finbro ECU —

    Rev limiter set at 12,500 rpm
    Need to re pin the wiring harness
    No cold start circuit

    Yuminashi ECU —

    No rev limiter set
    No need to re pin (only for OG Grom)

  2. #2
    Senior Member
    is breaking shit and taking names
     
    m in sc's Avatar
    Member #
    982
    Join Date
    Aug 2013
    Location
    Rock Hill SC
    Posts
    3,609
    pretty sure oyu listed the diffs as far as i could tell. both are keihin.
    Too many toys? nah. 09 Ducati sport classic, 74 rd350 LC hybrid, 73 RD350, 73 Kawasaki S2a, 67 Kawasaki C2TR 120 Roadrunner, 71 Kawasaki G3SS powered by a CR85 liquid cooled lump, 74 Moto-Morini 3 1/2 strada, 84 Yamaha RZ350, 1962 Ford falcon, 76 Ford maverick, very early 1970 non-us Spec Yamaha R5, 89 Yamaha DT50 bought NEW in 2015, 2015 KTM 390 Duke, 72 yamaha CS5.. . oh.. and 2014 Honda Grom with lots of mods.. (some useful, most not)

  3. #3
    Senior Member
    is Living the Dream
     

    Member #
    457
    Join Date
    Jun 2013
    Location
    San Jose Calif
    Posts
    7,612
    I know I tried the Finbro ECU way back when, I had to repin on my 2014 grom, this was when ECM was new to the grom BBK kit tuners and not much was known how to do a good tune and for me I tried it on both my 170-183-2v engine and I had nothing but bad luck, either running too rich or not holding idle at cold start.

    I bought two of the Yuminashi ECU because the price was right and I figured I could use it for future DIY testing. The finbro ECU is about $164 at Finbro North America and the Yuminashi is only $73.42

    The use of the Yuminashi also recommends that the throttle body size and F/I be changed or DIY until you get the performance you need.

    here is a link on the item for yuminashi and how to repin on SF grom or monkey bike
    YUMINASHI POWERSPORTS ECU (MSX/GROM & SF - Z125 MONKEY - WAVE125i) (38770-K26-901R)
    tooter likes this.

  4. Remove Advertisements
    HondaGrom.net
    Advertisements
     

  5. #4
    Senior Member
    This user has no status.
     
    tooter's Avatar
    Member #
    30592
    Join Date
    Jan 2019
    Location
    unincorporated rural Los Angeles County
    Odometer
    1000
    Posts
    261
    I'm running a Yuminashi ECU right now... currently with a DingerBuilt extra long intake

    -sbmovbz.jpg

    ...and a modified stock exhaust... just cat, no muffler.

    -uf01ukz.jpg

    The low price was very attractive so I took a chance on one.

    I don't yet know if the Yuminashi lacks a cold start feature because it hasn't been cold enough to trigger it. I'm assuming it doesn't just like the Finbro. It's not a problem here because the weather is mild. Even in the cold with the stock ECU the engine would high idle for only a minute before dropping down. It's highly likely Yuminashi and Finbro are the same product. Mileage has been good with it... 139.0 mpg so far. It's pinned for the OG so four wires need to change sockets to work on a SF.



    Repinning is lots of fun! (lol)
    2018 GROM:
    TOCE Dual Exhaust
    Yuminashi ECU
    TST Rear Fender Eliminator
    TST Taillight +Signal Lights
    TST Front Signal Lights
    Dinger Built Extra Long Intake
    Honda Monkey Rear Sets
    Honda Monkey Front Fender
    Honda Monkey Fork Guards
    Honda Black Plastics
    G Craft Rear Rack
    Cargo Crate

  6. #5
    Senior Member
    is gearing up for winter
     

    Member #
    6726
    Join Date
    Dec 2015
    Posts
    2,108
    Quote Originally Posted by tooter View Post
    I'm running a Yuminashi ECU right now... currently with a DingerBuilt extra long intake

    Click image for larger version. 

Name:	SbmOvBZ.jpg 
Views:	31 
Size:	604.6 KB 
ID:	79316
    oh mylanta. Id honestly love to see what that thing does to the torque curve. That thing is massive.

  7. #6
    Senior Member
    This user has no status.
     
    tooter's Avatar
    Member #
    30592
    Join Date
    Jan 2019
    Location
    unincorporated rural Los Angeles County
    Odometer
    1000
    Posts
    261
    Quote Originally Posted by turpinator View Post
    oh mylanta. Id honestly love to see what that thing does to the torque curve. That thing is massive.
    It's not magic but I'm sure it helps. I'm curious too, and when I can find the time, I'll put the TOCE exhaust back on it and get it dynoed.
    2018 GROM:
    TOCE Dual Exhaust
    Yuminashi ECU
    TST Rear Fender Eliminator
    TST Taillight +Signal Lights
    TST Front Signal Lights
    Dinger Built Extra Long Intake
    Honda Monkey Rear Sets
    Honda Monkey Front Fender
    Honda Monkey Fork Guards
    Honda Black Plastics
    G Craft Rear Rack
    Cargo Crate

  8. #7
    Senior Member
    This user has no status.
     

    Member #
    6719
    Join Date
    Dec 2015
    Posts
    2,297
    fyi, cold start is triggered on oil temps, so if the motor is "cold" (ie hasnt been ridden in awhile) it will turn on it even with warmer ambient temps. Sounds like the yuminashi doesnt have this... which makes sense as none of the asian market groms have it.
    Last edited by nd4spdbh; 04-03-2019 at 10:25 AM.
    shush319 likes this.

  9. #8
    Senior Member
    is breaking shit and taking names
     
    m in sc's Avatar
    Member #
    982
    Join Date
    Aug 2013
    Location
    Rock Hill SC
    Posts
    3,609
    ill check on mine if it triggers the cold start solenoid next time i bring it home from work.
    Too many toys? nah. 09 Ducati sport classic, 74 rd350 LC hybrid, 73 RD350, 73 Kawasaki S2a, 67 Kawasaki C2TR 120 Roadrunner, 71 Kawasaki G3SS powered by a CR85 liquid cooled lump, 74 Moto-Morini 3 1/2 strada, 84 Yamaha RZ350, 1962 Ford falcon, 76 Ford maverick, very early 1970 non-us Spec Yamaha R5, 89 Yamaha DT50 bought NEW in 2015, 2015 KTM 390 Duke, 72 yamaha CS5.. . oh.. and 2014 Honda Grom with lots of mods.. (some useful, most not)

  10. #9
    Senior Member
    is Big Ol' Pile of Dem Bones
     
    shush319's Avatar
    Member #
    22114
    Join Date
    Jul 2017
    Location
    Daytona Beach, FL
    Posts
    115
    Finbro is a self learning (auto-tune) ECU originally for a CB150R, re-flashed to "work" on the MSX/Grom.

    Yuminashi is a MSX125 (Thailand) ECU re-programmed to achieve 13.1-13.2 AFR (confirmed by Yuminashi via Facebook Messenger) through the whole RPM range (auto-tunes), w/o a rev limiter. Also w/o "Cold Start" (also verified by FB messenger) because the MSX125 does not have/need cold start. And is Plug-n-Play on the OG, needs stock harness re-pinned for the SF. Also half the price of the Finbro ;-)
    Last edited by shush319; 04-09-2019 at 02:13 PM.
    tooter likes this.

  11. #10
    Senior Member
    This user has no status.
     
    tooter's Avatar
    Member #
    30592
    Join Date
    Jan 2019
    Location
    unincorporated rural Los Angeles County
    Odometer
    1000
    Posts
    261
    Quote Originally Posted by shush319 View Post
    Finbro is a self learning (auto-tune) ECU originally for a CB150R, re-flashed to "work" on the MSX/Grom.

    Yuminashi is a MSX125 (Thailand) ECU re-programmed to achieve 13.1-13.2 AFR (confirmed by Yuminashi via Facebook Messenger) through the whole RPM range (auto-tunes), w/o a rev limiter.
    You're just gonna set off the Quibbler again. (lol)

    Also w/o "Cold Start" (also verified by FB messenger) because the does MSX125 not have/need cold start. And is Plug-n-Play on the OG, needs stock harness re-pinned for the SF. Also half the price of the Finbro ;-)
    Thanks for the info, man.

    The Yuminashi ECU also doesn't have a reset function like the stock ECU because it doesn't need it.
    shush319 likes this.
    2018 GROM:
    TOCE Dual Exhaust
    Yuminashi ECU
    TST Rear Fender Eliminator
    TST Taillight +Signal Lights
    TST Front Signal Lights
    Dinger Built Extra Long Intake
    Honda Monkey Rear Sets
    Honda Monkey Front Fender
    Honda Monkey Fork Guards
    Honda Black Plastics
    G Craft Rear Rack
    Cargo Crate

Page 1 of 5 1 2 3 ... LastLast

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. the new 'yuminashi' ecu and PCV/WB install/ initial test
    By m in sc in forum Grom Performance
    Replies: 10
    Last Post: 03-15-2019, 08:49 PM
  2. Replies: 19
    Last Post: 07-28-2016, 08:07 PM
  3. For Sale F/I, 2 PC-150, 2 yuminashi 10 hole, one yuminashi 14 hole
    By CiscoSanJose in forum Parts for Sale / Wanted
    Replies: 4
    Last Post: 05-26-2016, 03:45 PM
  4. Replies: 32
    Last Post: 04-06-2015, 12:31 PM
  5. Differences Thailand / USA / Europe version?
    By a_morti in forum Grom Talk
    Replies: 3
    Last Post: 01-21-2015, 03:14 PM