|BMW 1150R Valve adjustment procedure
By Bill Haycock
Tools and Supplies
10mm box end wrench (for valve lock nut)
3mm allen T-Handle or long wrench (for valve adjustment screw)
6mm hex drive (for valve cover bolts)
5mm hex drive (for cylinder head protectors, if installed)
6” x 3/8” extension
Two feeler gages of size .15mm (.006 in.) and .30mm (.012 in.)
Compressed air source
BMW spark plug wrench
BMW spark plug wire puller
Automotive “Contact” cleaner aerosol (optional)
Spark plug “anti-seize” compound (optional)
Oil drain pan
Valve cover bolts – 8nm or “snug” down to bolt “shoulder” (careful to not over tighten!)
Valve lock nut – 8nm
Spark plug torque – 20nm (Gap 0.8mm)
Intake valves (rear of cylinder and bike) - .006 in. (.15mm)
Exhaust valves (Front of cylinder and bike) – .012 in. (.30mm)
Place the bike on its center stand.
Remove cylinder head protectors (if installed) by removing 3 each socket heads bolts on each protector.
Remove the spark plug covers, remove the spark plug wires using the BMW spark plug wire puller, blow out the spark plug holes with compressed air, and remove the spark plugs. Check the spark plug condition and gap – replace if necessary.
Place an oil pan under the cylinder and remove the four valve cover bolts. A small amount of oil will spill into the pan. Remove the pan and place a shop rag under the cylinder and place the “head”, valve cover gasket, and rubber spark plug hole seal on the rag.
Clean all surfaces of oil and other substances. Use a clean dry shop rag.
Place the bike into 6th gear.
Start on the left side of the bike (left cylinder).
Rotate the rear wheel in the direction of travel and observe the intake (rear valve) move in (open) and then move out to the full extent outward. (TDC). The valve will move outward and then begin back inward. You want the valve to be at the full outward position.
Look into the valve cylinder opening and you will see a geared wheel with a cam chain. On the small gearwheel is an “arrow”. ()
Observe the alignment arrow and “tap” the rear wheel (in the direction of travel) to cause the alignment arrow to come to the horizontal in respect to the level ground. You are now at TDC for valve check and adjustment if necessary.
Grasp the rocker arms and check for some play. Generally, there should be some small amount of “play”. If not, you probably have one tight valve! It is not normally required to adjust the rocker arms.
Adjust the intake valves (rear of cylinder) using two .15mm (.006 in.) feeler gages – one in each valve. Use the 10mm box wrench and 3mm allen wrench to adjust the valve to a .15mm (.006 in.) value. With both feeler gages in place adjust the tightest valve first. This will cause the loose valve to adjust somewhat and might bring it into spec. If not, adjust both valves until a spec of .15mm (.006 in.) is reached. It is better to err on the loose side of the spec! Torque lock nut to 8Nm.
Adjust the exhaust valves (front of cylinder) next using the same procedure. Adjust to a spec of .30mm. (.012 in.)
Go to the other cylinder and again set TDC as described above and repeat the procedure for adjusting the intake and exhaust valves. Torque lock nut to 8Nm.
With both cylinders adjusted clean the valve cover gasket and rubber spark plug hole gasket using automotive “Contact”cleaner. Let dry. Wipe all surfaces clean. You may also clean with a dry shop rag – just get all old oil cleaned off before refitting the gasket.
Mount the valve cover gasket onto the cylinder and insure a smooth fit.
Place the rubber spark plug gasket in place on the valve cover.
Note: There is a possibility that the spark plug gasket can become mis-aligned when replacing the valve cover. Always look into the spark plug recess after the valve cover is on. If the gasket is not in place you will see it sticking out into the recess.
Hold the valve cover and align with mating surfaces. Press in and mate the cover. Check to see all surfaces are evenly mated.
“Snug” down the four valve cover bolts using the 180-degree pattern; pattern until you feel them bottom out on their “shoulders”; do not over tighten and strip out threads!" (They are only soft aluminum!) Torque to 8Nm.
1 ------ 3
4 ------ 2
Put “anti-seize” compound on the spark plug threads if desired - optional
Replace the spark plugs and torque to 20nm. Gap is 0.8mm.
Replace spark plug wire.
Replace spark plug cover – press in from rear to front being sure to “seat’ the two rubber appendages into their respective seating holes and ‘snap” cover on by applying pressure from rear to front.
This completes the valve adjustment procedure.