Moto Guzzi V85 TT - Service manual > Checking the valve clearance

If the timing system is very noisy, check the clearance between the valves and the rocking levers.

NOTE ADJUST WITH COLD ENGINE, WITH PISTON AT TOP DEAD CENTRE (TDC) IN COMPRESSION STROKE (VALVES CLOSED).

• Initially check the valve clearance in the left cylinder, then remove the four fixing screws of the spark plug cover

• Remove the spark plug cover

• Remove the spark plug tube

• Remove the three head cover fixing screws

• Remove the head cover

• Remove the spark plug

ALSO REMOVE THE SPARK PLUG OF THE RIGHT CYLINDER TO BE ABLE TO MANUALLY ROTATE THE ENGINE, ENGAGE THE FIRST GEAR AND TURN THE REAR WHEEL

• Intercept the top dead centre checking that the rockers have clearance to be able to measure it

• Use a feeler gauge to check that the clearance between the valve and the set screw corresponds with the indicated values. The corresponding intake and outlet valve clearances are different than what is indicated below, proceed with adjusting them.

Characteristic

Intake valve clearance 0.10 mm (0.0039 in) Exhaust valve clearance 0.15 mm (0.0059 in)

• Loosen the lock nut, adjust the clearance by acting on the adjuster until reaching the prescribed values
• Tighten the lock nut

• To perform the valve clearance of the right cylinder, it is necessary to bring the cylinder to the top dead centre, rotating the engine 270 degree

Top-up

FRONT BRAKE

• Unscrew and remove the screws (1)

• Remove the cover (2).

• Remove the diaphragm (3) and the gasket (4)

• Top up

REAR BRAKE

• Undo and remove the screw (1)

• Remove the bracket (2)

• Unscrew and remove the cap (3)

• Remove the gasket (4)

CAUTION RISK OF BRAKE FLUID SPILLING. DO NOT OPERATE THE BRAKE LEVER IF THE BRAKE FLUID RESERVOIR CAP IS LOOSE OR HAS BEEN REMOVED.

AVOID PROLONGED AIR EXPOSURE OF THE BRAKE FLUID. BRAKE FLUID IS HYGROSCOPIC AND ABSORBS MOISTURE WHEN IN CONTACT WITH AIR. LEAVE THE BRAKE FLUID RESERVOIR OPEN ONLY FOR THE TIME NEEDED TO COMPLETE THE TOPPING-UP PROCEDURE.

TO AVOID SPILLING FLUID WHILE TOPPING-UP, KEEP THE TANK PARALLEL TO THE RESERVOIR EDGE (IN HORIZONTAL POSITION).

DO NOT ADD ADDITIVES OR OTHER SUBSTANCES TO THE FLUID.

WHEN USING A FUNNEL OR ANY OTHER ELEMENT, MAKE SURE IT IS PERFECTLY CLEAN.

WHEN TOPPING UP, DO NOT EXCEED THE "MAX" LEVEL.

TOPPING UP TO THE "MAX" LEVEL MUST BE CARRIED OUT ONLY WITH NEW PADS. DO NOT TOP UP TO THE "MAX" LEVEL WITH WORN PADS BECAUSE THIS WILL CAUSE FLUID TO LEAK OUT IN THE EVENT OF BRAKE PAD REPLACEMENT.

CHECK BRAKING EFFICIENCY. IN THE EVENT OF EXCESSIVE BRAKE LEVER TRAVEL OR A LOSS OF EFFICIENCY WITH THE BRAKING SYSTEM, THE BRAKING SYSTEM MAY NEED TO BE BLED.

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