Power loss. Help please
Thread Starter
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Intermediate
Joined: Mar 2015
Posts: 41
Likes: 0
From: Harrisonburg VA
Power loss. Help please
I have a 1998 RK Classic EFI. Rode it to work this morning and it ran fine. When I left this evening it was a different bike. When i got home I checked the plugs & they are grey, as I would think they should be. The air filter was just cleaned about 1000 miles ago, but i did make sure it hadn't sucked shut and it's good. I had true duals and some slip ons installed and tuned around 1000 miles ago as well. The bike ran great afterwards. Now when you roll into the throttle it kinda feels like it's being choked down. I don't know how else to describe it. This is my first bike and I really have no idea what to look at next. Any ideas or suggestions would be greatly appreciated.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
Then your first step is getting a factory service manual.
It's a must have for people working on their own bikes IMO.
It's a must have for people working on their own bikes IMO.
Ultimate HDF Member
Joined: May 2006
Posts: 6,590
Likes: 444
From: Ohio
TO CHECK FOR CODES ON M & M EFI:
1-turn ignition key switch to ignition and then turn off 1 second after fuel pump stops. Make sure the run/stop switch om bars is on RUN
2.repeat #1 again..remember 1 second after pump stops
3.turn ignition key switch to ignition and wait about 8 seconds for a bunch of flashing of the check engine light
it will then stop for 2 seconds..get ready... these are the codes you must count:
it will very slowly flash 1,2,3,5....there is NO 4....this is the first digit of the 2 digit code ..so it can only be 1,2,3,5 __ __
then a 2 second pause...then you will get second digit of the 2 digit code very slowly..it can only be 1,2,3,4,5,6
remember after the complete 2 digit code is given you will go back to the rapid flash sequence.. the very rapid flash is not a code.
there are a total of 15 codes available with this procedure
examples
52,53,54,55 bad news ECM replacement
56 crank/cam sensor
11 throttle sensor
12 barometric
14 engine temp. sensor
15 intake temp sensor
23 and 32 are injectors front/rear
24 coil
33 fuel pump relay--in this case you would not hear the pump but instead waited 3 seconds after the on / off sequence
1-turn ignition key switch to ignition and then turn off 1 second after fuel pump stops. Make sure the run/stop switch om bars is on RUN
2.repeat #1 again..remember 1 second after pump stops
3.turn ignition key switch to ignition and wait about 8 seconds for a bunch of flashing of the check engine light
it will then stop for 2 seconds..get ready... these are the codes you must count:
it will very slowly flash 1,2,3,5....there is NO 4....this is the first digit of the 2 digit code ..so it can only be 1,2,3,5 __ __
then a 2 second pause...then you will get second digit of the 2 digit code very slowly..it can only be 1,2,3,4,5,6
remember after the complete 2 digit code is given you will go back to the rapid flash sequence.. the very rapid flash is not a code.
there are a total of 15 codes available with this procedure
examples
52,53,54,55 bad news ECM replacement
56 crank/cam sensor
11 throttle sensor
12 barometric
14 engine temp. sensor
15 intake temp sensor
23 and 32 are injectors front/rear
24 coil
33 fuel pump relay--in this case you would not hear the pump but instead waited 3 seconds after the on / off sequence
Stellar HDF Member
Joined: Jul 2014
Posts: 2,721
Likes: 243
From: NC
Check the codes as directed. It Seems to me mine was acting like this when the temp sensor started going bad and eventually got real weird. If you are still riding it notice if the idle will rev high on its own. Temp sensor.
Ultimate HDF Member
Joined: May 2006
Posts: 6,590
Likes: 444
From: Ohio
Sometimes the temp sensor will not throw a code, even when it is the usual culprit......... go figure.
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Thread Starter
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Intermediate
Joined: Mar 2015
Posts: 41
Likes: 0
From: Harrisonburg VA
Thanks for all the help. I'll check for codes as soon as i get off work, and I'll be ordering a service manual this week as well.
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