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Steve
Steve, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 6832
Experience:  30+ yrs. experience, MMI, HD technician, HD early, engine rebuild/performance, bike builder, kit bike program manager, CCI 2001-2004
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I have a 2000 Roadking FLHRI with code 56. It suddenly

Customer Question

I have a 2000 Roadking FLHRI with code 56. It suddenly started barley being able to idle and has lost power. I replaced the Crank sensor and it idles now but still has no power and there's alot of backfiring.
JA: Is the power loss consistent, or does it fluctuate?
Customer: pretty consistant It's like with a little throttle it feels like it may be good but then it craps out with a little more turn
JA: What is the model of your '00 motorcycle?
Customer: Roadking FLHRI
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: yep. I cleaned the throttlebody, ran some seafoam through it when that didn't work I started googling and figured out how to pull the codes. Got the one code 56 and replaced the crank sensor.
JA: Anything else you think the mechanic should know?
Customer: I don't think so
Submitted: 3 months ago.
Category: Motorcycle
Expert:  kwiggins29059 replied 3 months ago.

Low voltage can also cause this code. What's your battery reading with the bike off and running?

Customer: replied 3 months ago.
The battery is a month old
Expert:  Steve replied 3 months ago.

your symptoms indicate a problem with system voltage. it could be the battery or the charging system or both.

there was a reason you replaced the battery.

it may have been a bad battery or it could have been a problem with your charging system.

I need to know what's going on right now to help you.

Please.....measure the battery voltage under the following conditions:

- ignition OFF.

- ignition ON.

- with the start button depressed.

- with the engine at about 2,000 rpm (fast idle).

let me know what you find.

Steve

Customer: replied 3 months ago.
I will have to do it tonight or tomorrow. I'll let you know as soon as i do
Expert:  Steve replied 3 months ago.

let me know what you find.

Steve

Customer: replied 3 months ago.
ignition OFF. 13.01- ignition ON. 12.60- with the start button depressed. 11.6- with the engine at about 2,000 rpm (fast idle). 14.1
Expert:  Steve replied 3 months ago.

- the voltages for the battery only tell me you have the battery on a charger for some reason. but the capacity seems adequate.

- your charging voltage is good.

- code 56 is a crnk/cam sensor mismatch.

you may have an issue with your cam sensor. it is not uncommon for them to melt and fail.

remove the timer cover and inspect the cam sensor.

let me know what you find.

Steve

Customer: replied 3 months ago.
visually it looks normal
Expert:  Steve replied 3 months ago.

there is either a problem with one of the sensors , the wiring to the sensors, or the ECM.

Steve