New Information! Please Read Again!
This is in reference to another post… I couldn’t have done this without the help of the member who posted the information which was on the R1 forum.
This was so much fun to do and in my opinion well worth it.
New info: If you have a Euro model, then you can skip the grounding of wire 29, move stright to adjusting the settings. Only US/Canada models need to ground wire 29.
You are going to have to ground wire 29 coming from you ECU, so first remove your seat and then you are going to need to locate the wiring harness leading into your computer
Disconnect it and look on the side where the wires lead into it. If you look closely you can locate the number “27” on the bottom area. The wire you are going to need to snip is wire “29”. Move over two wires and cut wire “29” give yourself enough room to reattach the ends when you finished.
Attach the end of the wire that comes from the harness to a ground, the negative battery terminal is right there so you might as well use it.
Now with a secure ground on wire "29" press both the "RESET" and "SELECT" while you turn the key to the “ON” position. Keeping them pressed for about 8 sec. you will see “DIAG” apprear.
Press “SELECT” once and you should see “CO”. If you don’t see “CO” turn your bike off and check your ground and try again. If you are sure your wire is grounded properly try cutting wire “27” and ground one of those two (wire “27” loops around and connects with wire “29” theoretically either one will work.)
Now with “CO” on the LCD screen press both “RESET” and “SELECT” for about 2 sec. and you should see “C1”
Use the “SELECT” or “REST” buttons to select the cylinder you wish to adjust. Then press both “SELECT” and “RESET” for about 2 sec. and you will see the current setting.
My settings from factoy were as follows:
I recommend writing these numbers down because this is what you are going to need to use as a starting point.
Now here’s the dilemma… no one can come up with proof as to what exactly these settings do… I have had people contact me telling me the following but when I asked them for documentation which they claim they read it from they couldn’t come through.
Theory 1: C1 is cylinder 1, C2 is cylinder 2 and so on; and the reason for the different numbers was due to a staggered pattern often seen in many carbureted bikes. You must adjust all 4 as needed.
Theory 2: C1 is cylinder 1, C2 is cylinder 2 and so on; and the reason for the different numbers was due to a staggered pattern often seen in many carbureted bikes. You must adjust all 4 as needed but only affect rpm range from 3k or less. Adjusting these settings will do nothing to help performance at higher rpms.
Download this PDF
The information is on page 29 (25 if you go by document page numbers.)
Fuel injection Adjustment
Fuel injection amount can be adjusted in the following four ranges:
Code C1: Fuel amount injected at 25% or less of throttle opening and at 3000 rpm or less of engine speed
Code C2: Fuel amount injected at 25% or less of throttle opening and at 3000 rpm or more of engine speed
Code C3: Fuel amount injected at 25% to 90% of throttle opening
Code C4: Fuel amount injected at 90% or more of throttle opening
Before changing the settings, check the engine for its characteristics in normal condition. It is recommended that the settings be checked with an A/F measuring instrument.
Guidelines for setting
At 25% or less of throttle opening and at 3000 rpm or less of engine speed:
This affects the idling stability and the feeling experienced during races. Too rich an air-fuel mixture may foul the spark plugs.
At 25% or less of throttle opening and at 3000 rpm or more of engine
This affects the feeling experienced during engine braking and at initial
throttle opening. Make a change of 2 to 5% at a time while checking for any resulting changes.
At 25% to 90% of throttle opening:
This affects the feeling experienced at half throttle opening. Make a change of 2 to 5% at a time and check for any resulting changes.
At 90% or more of throttle opening:
This affects the feeling experienced at full throttle. Adjustment to too lean a mixture will lead to engine breakdown. Adjustment by checking the A/F is recommended. In particular, to adjust on the leaner side, make a change of 1 to 2% at a time while checking for the result. 12 to 13 is a targeted A/F.
To change the setting select the cylinder you want to adjust and then hold the “RESET” and “SELECT: buttons for two sec. this will display the current setting as shown above. Once you can see the current setting you can adjust using the “SELECT” button to go up in number or the “RESET” button to go down in number. Push both “SELECT” and “RESET” when you finished setting your new numbers.
Now turn your bike off and then reconnect your wire “29” back to itself using what ever you wish, and take it for a ride!
Also I am curious in the diffrence in numbers on the bikes... So if anyone does this post your year bike and your numbers. mine was an '04
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