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1st Gear
Joined: Jun 2022
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From: Miami
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Post pushrod installation I have this clicking sound and the rpm isn’t stable. I’ve took them off and put them back several times. Any know what it could be.
Last edited by Idkimnotcreative; Jun 16, 2022 at 05:07 PM.
Road Warrior
Joined: Jul 2013
Posts: 1,649
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From: Indianapolis
What year / model Sportster do you have?
The Intake and Exhaust pushrods are different length on the EVO Sportsters., do you have them in the correct location for Intake / Exhaust ?
Position Color Band length inches cm
Intake Orange 10.746" 27.295 cm
Exhaust Purple 10.800" 27.432 cm
The Intake and Exhaust pushrods are different length on the EVO Sportsters., do you have them in the correct location for Intake / Exhaust ?
Position Color Band length inches cm
Intake Orange 10.746" 27.295 cm
Exhaust Purple 10.800" 27.432 cm
Road Warrior
Joined: Jul 2013
Posts: 1,649
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From: Indianapolis
Are you putting the cylinder you are removing / installing the rocker box at TDC on the cylinder's compression stroke?
- It's very important to position the motor correctly before attempting to remove / install a rocker box. Not only must the motor be at or near top dead center (TDC), but it must be at the correct TDC.
- A four stroke engine makes two complete revolutions to complete it's cycle, and therefore the piston passes through TDC twice.
- One of those times is overlap TDC, which has the valves slightly open. You do not want to remove or install the rocker box with the motor in this position.
- Turn the engine one complete revolution from overlap TDC to get to compression TDC. Both valves are closed at compression TDC, so this is the position you want to remove / install the rocker box.
- An easy way to tell if the motor is at TDC is to turn it forward while watching the intake lifter or pushrod. You will see the lifter or pushrod go up and then down again. The next TDC that occurs after it goes down is compression TDC.
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Stellar HDF Member
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From: Dallas, Texas
To adjust the push rods PROPERLY you need to change the solid tubes to the "old design" 3 piece ones. Adjust the lash when the lifter is at it's lowest position, with the push rod tube collapsed. Adjust and move on to the next one. FYI - ya need to remove the heads to change push rod tubes. Much easier and LESS CONFUSING to simply put the original push rods back it.
Seasoned HDF Member
Joined: Jul 2014
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From: Cental, MI
To adjust the push rods PROPERLY you need to change the solid tubes to the "old design" 3 piece ones. Adjust the lash when the lifter is at it's lowest position, with the push rod tube collapsed. Adjust and move on to the next one. FYI - ya need to remove the heads to change push rod tubes. Much easier and LESS CONFUSING to simply put the original push rods back it.