Rottweiler
Well-Known Member
I have a 2004 Chopper and just replaced the cam sensor. What is the best way to check the timing?
Setting Timing
- Thread starter Rottweiler
- Start date
The tone wheel or the cup with cutout, this is fixed to the crank and triggers at the c/s.
The crank sensor is set at the degree of the manufacturer.
The ignition is controlled by the ECU and times the engine curve from that stationary c/s position.
It's tamper proof.
It's spot on.
It's one last thing to adjust.
It's like an injector is set in its place and no adjustment needed, the computer takes it from there.
The crank sensor is set at the degree of the manufacturer.
The ignition is controlled by the ECU and times the engine curve from that stationary c/s position.
It's tamper proof.
It's spot on.
It's one last thing to adjust.
It's like an injector is set in its place and no adjustment needed, the computer takes it from there.
Rottweiler
Well-Known Member
On a 2004 I have a cam sensor in the nose cone. I marked were the old one was before removing it. The new one is a little different. I believe the pick up was a little wider. There is a v-notch on the back plate and I put it as close to where the old one was. Bike runs but misses so I adjusted it a little both ways to get it to run smoother.
Wills67
Well-Known Member
From the S&S website
S&S Timing
S&S recommends using electronic ignition with adjustable advance curve in Super Stock® and Super Sidewinder Long Blocks. Adjustable curve permits slowing rate of advance to control or eliminate pinging under heavy load or when elevated temperatures or poor quality gasoline are encountered. Install ignition according to manufacturer's instructions. Leave spark plugs out while static timing to ease flywheel rotation.
Flywheels in S&S Big Twin-Style Long Blocks have three timing marks:
( F ) = Front cylinder firing mark, 35 degrees before TDC with vertical line in center of hole.
See caution below.
( R ) = Rear cylinder firing mark, 35° before TDC with dot in center of hole.
( T:F) = Front piston, Top Dead Center with colon
) in center of hole.
Most fully electronic ignitions are timed at TDC. Points and other ignitions with mechanical advance are timed at front cylinder firing mark. With correct mark centered in timing inspection hole, ignition at full advance will occur 35° before TDC. S&S, however, recommends setting initial timing at 32° BTDC. This can be accomplished by setting the ignition to fire when flywheel mark is leaving timing inspection hole on left side.
S&S Timing
S&S recommends using electronic ignition with adjustable advance curve in Super Stock® and Super Sidewinder Long Blocks. Adjustable curve permits slowing rate of advance to control or eliminate pinging under heavy load or when elevated temperatures or poor quality gasoline are encountered. Install ignition according to manufacturer's instructions. Leave spark plugs out while static timing to ease flywheel rotation.
Flywheels in S&S Big Twin-Style Long Blocks have three timing marks:
( F ) = Front cylinder firing mark, 35 degrees before TDC with vertical line in center of hole.
See caution below.
( R ) = Rear cylinder firing mark, 35° before TDC with dot in center of hole.
( T:F) = Front piston, Top Dead Center with colon
) in center of hole.Most fully electronic ignitions are timed at TDC. Points and other ignitions with mechanical advance are timed at front cylinder firing mark. With correct mark centered in timing inspection hole, ignition at full advance will occur 35° before TDC. S&S, however, recommends setting initial timing at 32° BTDC. This can be accomplished by setting the ignition to fire when flywheel mark is leaving timing inspection hole on left side.
Rottweiler
Well-Known Member
This is what I found in the 2004 service manual.
1999 to PRESENT TIMING PROCEDURE - THUNDERHEART
Big Dog motorcycles use an electronic ignition system that MUST BE timed utilizing a special
timing module. The following is the procedure that should be followed to insure that the motor
is timed correctly:
STEP ONE: Remove the seat and dash to gain access to the motorcycle’s installed ignition
module and battery. The ignition module is mounted forward of the main harness module
(EHC), and is about the size of a business card. (When the power is on, and the motor is cranked
over, the LED located on its top will blink off and on. This indicates that the sensor plate pickup
is generating timing pulses and the module is receiving them.) Trace the harness wires that exit
from the module to their connection with the sensor plate harness wires located near the nose of
the seat between the right side gasoline tank and the frame. Disconnect the motorcycle’s ignition
module and plug in the timing module. Connect the ground clip to a suitable ground or the
negative battery post.
STEP TWO: Hook up an impulse timing light. Remove the timing plug located on the motor’s
left side over the primary drive. Remove the two screws that attach the timing cover to the nose
cone. Loosen the two stand-offs that secure the timing plate so that it can be moved. Start the
motorcycle, bring the engine to 1500 RPMs as one person slowly rotates the timing plate
counter-clockwise while another person looks for the FI mark on the flywheel to come into the
front (forward) portion of the timing hole. The plate should be secured when the front cylinder
full advance firing mark should be JUST STARTING to LEAVE the front of the timing hole.
(See photo above.) Remove the special timing module and reattach the wires to the motorcycle’s
ignition system module. Replace the timing plug, dash and seat. Return the idle speed to 1000
RPM.
Do I need a special timming light?
1999 to PRESENT TIMING PROCEDURE - THUNDERHEART
Big Dog motorcycles use an electronic ignition system that MUST BE timed utilizing a special
timing module. The following is the procedure that should be followed to insure that the motor
is timed correctly:
STEP ONE: Remove the seat and dash to gain access to the motorcycle’s installed ignition
module and battery. The ignition module is mounted forward of the main harness module
(EHC), and is about the size of a business card. (When the power is on, and the motor is cranked
over, the LED located on its top will blink off and on. This indicates that the sensor plate pickup
is generating timing pulses and the module is receiving them.) Trace the harness wires that exit
from the module to their connection with the sensor plate harness wires located near the nose of
the seat between the right side gasoline tank and the frame. Disconnect the motorcycle’s ignition
module and plug in the timing module. Connect the ground clip to a suitable ground or the
negative battery post.
STEP TWO: Hook up an impulse timing light. Remove the timing plug located on the motor’s
left side over the primary drive. Remove the two screws that attach the timing cover to the nose
cone. Loosen the two stand-offs that secure the timing plate so that it can be moved. Start the
motorcycle, bring the engine to 1500 RPMs as one person slowly rotates the timing plate
counter-clockwise while another person looks for the FI mark on the flywheel to come into the
front (forward) portion of the timing hole. The plate should be secured when the front cylinder
full advance firing mark should be JUST STARTING to LEAVE the front of the timing hole.
(See photo above.) Remove the special timing module and reattach the wires to the motorcycle’s
ignition system module. Replace the timing plug, dash and seat. Return the idle speed to 1000
RPM.
Do I need a special timming light?
Rottweiler
Well-Known Member
Well after putting Axel new EHC today set cam sensor and went for a ride adjusted it counter clockwise a little more. Bike is running great.
sarringar1
New Member
where do I get this timing module?
sarringar1
New Member
I just replaced my cam sensor on my 2002 pro sport and it fired right up but wants to idle @500, probably would die if I let it. so, I figure it is retarded. ? Big dog's manual says that I need a special 'Timing Module' to time it. Can anyone explain this to me?If it had points and a rotor I would have no problems. lol
Rottweiler
Well-Known Member
What did you put in?
I would test ride and see how it runs. Lack of power then advance. Pinging then retard.
I would test ride and see how it runs. Lack of power then advance. Pinging then retard.