What is a tappet on a motorcycle?
A tappet is a device that slides or rolls on the cam lobe following the cam profile and translates the eccentric shape of the cam lobe to an up-and-down motion that opens and closes the valves. Tappets also provide a way to take up the lash between all the various components in the valve train.
Where is retaining pin on twin cam tensioner?
Using the mirror, you can locate the two hooks on the tensioner. These are what the retaining pin fits through when the tensioner is disengaged so you slip a sturdy and long flat bladed screwdriver under the rear one. Lever it up and stick the retaining pin through until it supports the tensioner under the outer hook.
Where is the tappet on a gear drive bike?
As you may be aware, in a gear drive setup, the rear cam turns in the opposite direction of the crank and front cam. The intake tappet (A) is just starting to roll down the backside of the cam lobe, closing the intake valve. The exhaust tappet (B) is already on the heel, or base circle, of the cam so the exhaust valve is closed.
What are the steps to installing a camshaft?
Remove the Mass Air Flow (MAF) and Intake Air Temperature (IAT) sensor assembly, if necessary. Unbolt the radiator tray and remove it. Unbolt and detach the Manifold Air Temperature (MAT) tubes from the manifold. Remove the spark plug wires, disconnecting the wiring harness leading to the coil packs and remove the coil packs from the valve covers.
Can you remove the timing cover on a camshaft?
Access the camshaft. Removing the timing cover is one of the most difficult parts of an in-car installation, if you’re going to attempt it without pulling the engine. The oil pan must be lowered enough to remove the timing cover while also clearing the crankshaft snout.
How to install a H-D Twin Cam camshaft?
Align timing marks and torque retaining bolts in the correct sequence as listed in manual. Install push rods adjust to the shortest length rocker arm end first. Rotate motor so pushrod is on the base circle and adjust pushrod to zero lash. Adjust pushrod per manufacturer’s specs and tighten jam nut (generally 2.5-4 turns depending on thread pitch).
As you may be aware, in a gear drive setup, the rear cam turns in the opposite direction of the crank and front cam. The intake tappet (A) is just starting to roll down the backside of the cam lobe, closing the intake valve. The exhaust tappet (B) is already on the heel, or base circle, of the cam so the exhaust valve is closed.
Can a cam swap be performed on a 2007 Harley Davidson?
Performing a cam swap on a 2007-later Twin Cam motor is very straight forward. Here is some basic information and pictures from a cam swap on a 2010 Harley Davidson Ultra Limited. Please refer to your service manual for specific instructions for each model
When to turn tappets over on Hot Bike?
If the pushrods are loose enough to be turned between your fingers (valves fully closed) after 10 minutes, you can turn the engine over until the tappets on the other cylinder are at their lowest point of travel and adjust them the same way.