Major camshaft manufacturers recommend setting valves cold, to avoid erroneous adjustments on lifters that may be “pumped up” If you are setting valves on a fresh engine that has not been run, everything should be well lubricated before you begin.
How do you adjust the valves on a Yamaha Raptor 700R?
Adjusting the Valve Clearance on a Yamaha Raptor 700R
- Loosen the lock nuts on top of the intake valves.
- Place a 0.10 mm feeler gauge between the valve rocker arm and the valve head to adjust the intake valve clearance at 0.10mm, which is the proper setting for the Yamaha Raptor 700R.
Is valve adjustment easy?
The first step is to pull the engine’s valve cover. Although rockers and shafts add complexity, valve adjustment there is easy. A threaded rod or an eccentric at the end of each rocker arm adjusts the clearance to the top of the valve.
Do you adjust valves open or closed?
When the exhaust valve just begins to open on the first cylinder in the firing order, adjust the intake valve by loosening the adjusting nut slightly while spinning the pushrod until you feel lash in the rocker arm. When all of the intake valves have been set to the proper valve lash, you can adjust the exhaust valves.
How do you tell if your valves need adjusting?
You should have your valve lash inspected at manufacturers recommended intervals. A sure sign that it’s time for a valve lash adjustment is if your engine is making a loud clicking or tapping noise when starting up or if you experience a loss in engine power.
How often do valves need to be adjusted?
Valve lash adjustment is a relatively uncomplicated procedure. Valve lash should be checked and adjusted as needed as a normal maintenance process every 1,000 to 3,000 hours after the initial adjustment.
What happens when valves are out of adjustment?
Too much or too little valve clearance can result in poor performance or a rough idle because the engine can’t “breathe” normally and operate at peak efficiency. Too much clearance means the valves will likely clatter and, over the long term, cause damage to the valves, camshaft lobes or rocker arms.
