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Author Topic: NEED HELP WITH THE BIKE.. HAVING AN ISSUE WITH IT RUNNING LEAN AND OVERHEATING  (Read 220 times)

Online BLU88

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bike is a 2013
So over the winter i built a racebike..  1441  motor set up to eventually spray the motor with nitrous.
so this season been working thru some rider rust from not drag racing in about 5 years.

now to the issue with the bike. i had a powercommander for the tuning of the bike. i had been having some overheating issues so we thought it was a blown head gasket.
took the bike back to the engine builder, cause i also wanted it tuned with the ecu.  as soon as he got the bike he checked and no blown head gasket. bike is just runnign verry lean. .... here comes the problem .. we cant figure out why the bike is running so lean.

1. had the injectors refurbished and flow checked
2.replace the fuel pump with a new one
3.replace fuel pump with new aftermarket fuel pump
4.replaced ecu with a new one
5.tuned thru ecu as well as tried with powercommander.

need help and other ideas as to what could be the issue of not being able to get enough fuel to not run lean .... as this time i will not be able to put any nitrous to the bike and also need to figure out the running lean issue.

any ideas are welcomed.
thanks blu88
2013  black "throat punch racing"
2008  gray and black. (Sold)
2002 black n blue.(sold)

Online sportbikeryder

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It isn't responding even with a power commander? Check the fuel pressure I guess.

Does the bike rev up and make power or is it off the chart lean?
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Offline Stainless1

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did you eliminate or bypass the clutch switch when you set it up for racing? 
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Online BLU88

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It isn't responding even with a power commander? Check the fuel pressure I guess.

Does the bike rev up and make power or is it off the chart lean?

Bike runs and makes power.. just lean off the charts and then runs hot.  set the bike up for spray and to lean to even try to spray :(
fuel pressure is good also.
« Last Edit: July 20, 2017, 10:57:41 AM by BLU88 »
2013  black "throat punch racing"
2008  gray and black. (Sold)
2002 black n blue.(sold)

Online BLU88

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did you eliminate or bypass the clutch switch when you set it up for racing?

so help me when you say clutch switch .. .so i am not calling it something else and what is the function of bypassing the clutch switch?

how would that cause it to run lean ?
« Last Edit: July 20, 2017, 10:57:09 AM by BLU88 »
2013  black "throat punch racing"
2008  gray and black. (Sold)
2002 black n blue.(sold)

Offline Stainless1

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the clutch switch is on the handlebar, behind the clutch lever.  It is part of the start sequence, kick stand up, clutch in before it runs.  Some have been known to bypass both to make life easier... however, the ECU needs to see at least one clutch actuation to work correctly.... otherwise it is stuck in Neutral mode, will not fuel the motor properly, if you have upper and lower injectors, only the lower will function.  It is kind of like being in limp mode.
Bonneville 200 MPH Club
245 MPH Turbo Busa Powered Lakester
208.959 MPH NA GSXR 1000