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Wireing diagram for 2021 ct 125.

SLO

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Nov 26, 2021
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meadowview virginia
I got a Dyno Boost Performance chip I was going to try ,and I need to make sure whats what. I have to wire into the MAF /MAP-TMAP sensor. There are two modules? The IAT signal wire is what I need to access.Also I need to get to the O2 sensor wire if it has one. I see two sensors,one on each side of cylinder,but nothing in the exhaust? Is one oil pressure warning and other heat warning? Anybody that can help? I tried online without success. Thanks in advance.
 

AZ7000'

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Jan 28, 2021
Messages
989
Try this? a pdf version of a picture of my manual...
 

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SLO

Active member
Joined
Nov 26, 2021
Messages
382
Location
meadowview virginia
Try this? a pdf version of a picture of my manual...
Thank you for taking the time to send this. After third picture was able to figure it out. It does have one O2 sensor,I believe it is a BLACK/ORANGE wire coming from ECU. Picture was still a little grainey, but I believe I will find it. THANKS!
 

SLO

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Nov 26, 2021
Messages
382
Location
meadowview virginia
The wiring harness and modules are so tightly wrapped that I feel I would devalue the bike if I try and access what I need. I know I could not duplicate the FACTORY WRAP.. Also the OEM device has a micro screw that has to be turned 30 times in quarter turn increments. Put back snorkel and OEM filter and will let ECU learn the new injector,and whine the SHIT out of it to get around. Might look into 13 tooth sprocket. I could lose top end I can't have anyway to maintain speed uphill.New SHINKO 244s cost top end but I would not go back. Great setup for bike.
 

m in sc

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Feb 2, 2021
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Rockhill, SC
im not sure of an air temp sensor on this motor TBH.. but the o2 wire is easy to access. did you get a booster plug for it or?
 

SLO

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Joined
Nov 26, 2021
Messages
382
Location
meadowview virginia
im not sure of an air temp sensor on this motor TBH.. but the o2 wire is easy to access. did you get a booster plug for it or?
I got a Dyno Boost Motorcycle performance chip from Magnum Tuning . I am not happy with the fact that it has a micro screw adjustment that has to be done while riding.Thirty turns to off, to be completed in quarter turn increments until peak performance. SHIT! I could reach down and turn a jet on a carb a lot easier than that and have done so while riding.
 

Carolina Vagabond

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My FIL used to race here in NC back in the 50’/60’s. He won the 1964 World Demolition Derby at Charlotte. He frequently talks about 2 brothers that would adjust the carbs on their car during qualifying. One would lay on the engine and adjust as the other drove around the old Charlotte track 100+ mph. Do you have a faithful brother?🤣
 

dmonkey

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Jul 4, 2021
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🇺🇸
My FIL used to race here in NC back in the 50’/60’s. He won the 1964 World Demolition Derby at Charlotte. He frequently talks about 2 brothers that would adjust the carbs on their car during qualifying. One would lay on the engine and adjust as the other drove around the old Charlotte track 100+ mph. Do you have a faithful brother?🤣
There's a blurry line somewhere between fearlessness and stupidity.
vittie_cothron.jpg
 

SLO

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Joined
Nov 26, 2021
Messages
382
Location
meadowview virginia
im not sure of an air temp sensor on this motor TBH.. but the o2 wire is easy to access. did you get a booster plug for it or?
Yeah, I have a copy of wiring diagram sent to me but it isn't clear enough to make out. Can you make out diagram of sensor unit next to evap purge control solenoid valve? Or any of wires leaving ECU. I can't quite make out diagram,blurry. I can't find mass flow sensor and thought I could by looking at intake , but multiple wires in both plugs attached at air intake. Cold outside today, it is in garage, might go ahead a try to see if it works as purported. No returns if installed.
 

SLO

Active member
Joined
Nov 26, 2021
Messages
382
Location
meadowview virginia
im not sure of an air temp sensor on this motor TBH.. but the o2 wire is easy to access. did you get a booster plug for it or?
Oh, OK maybe that is why I can't find on diagram. But the intake has two different plug in type modules with multiple wire harness on each. The module is supposed to be for bike specific, with the instructions for wiring the D-BOOST module in series from the ECU and the Intake air sensor and in parallel with the Oxygen sensor. It states that the( MAF )mass air flow sensor is a stand alone sensor or part of MAP- TMAP manifold absolute pressure sensor on intake. Got any idea?
 

AZ7000'

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Joined
Jan 28, 2021
Messages
989
Yeah, I have a copy of wiring diagram sent to me but it isn't clear enough to make out. Can you make out diagram of sensor unit next to evap purge control solenoid valve? Or any of wires leaving ECU. I can't quite make out diagram,blurry. I can't find mass flow sensor and thought I could by looking at intake , but multiple wires in both plugs attached at air intake. Cold outside today, it is in garage, might go ahead a try to see if it works as purported. No returns if installed.
image.jpg
 
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