Royal Enfield Interceptor 650 - Service manual > Tappet Clearance Adjustment

Engine / Components Assembly on Engine / Tappet Clearance Adjustment

Tappet Clearance Cylinder Head LH

  • Ensure "L" mark on camshaft (a) is aligned to cylinder head.

Components Assembly on Engine

  • Ensure the flat edge of the special tool (a) is correctly located in the slot on the camshaft on RH side AND the tool is resting correctly on the cylinder head.
  • Gently rotate crankshaft to ensure proper seating of the tool in the camshaft slot and cylinder head.

Components Assembly on Engine

  • Loosen tappet adjuster screw locknut (a) with tappet adjusting tool and ensure locknut is sufficiently loose.

Components Assembly on Engine

  • Insert a screwdriver into the tappet adjusting tool (b) and ensure it is seated correctly on the adjuster screw (a).

Components Assembly on Engine

  • Locate feeler strip (a) between adjuster screw and valve stem as per thickness mentioned below.

Components Assembly on Engine

  • Gently pull out feeler strip (a) and check if it comes out freely OR with resistance.

Components Assembly on Engine

  • In case feeler strip comes out freely the adjuster screw has to be tightened.
  • In case feeler strip movement is hard, the adjuster screw must be loosened.
  • Tighten/loosen adjuster screw using screw driver, while simultaneously checking correct and smooth movement of feeler strip.
  • Ensure tappet adjusting tool (a) does not rotate while adjusting the screw.

Components Assembly on Engine

  • After setting correct gap, remove feeler strip, hold screw driver firmly such that the setting DOES NOT gets disturbed and gently lock the lock nut against rocker arm using special tool (a).

Components Assembly on Engine

  • Repeat above steps to adjust the other tappet in cylinder head LH.

NOTE

  • Reconfirm correctness of tappet clearances before final locking of lock nuts.

CAUTION Do not adjust tappets with less OR no clearance as it will result in poor compression, valve burn-out and wear-out of tappet adjuster foot.

Do not adjust tappet with high clearance as will result in noise and insufficient opening of the valves.

  • Remove screw driver and both special tools after adjustment is complete.

Tappet Clearance Cylinder Head RH

  • Ensure "R" mark on camshaft (a) is aligned to cylinder head.

Components Assembly on Engine

  • Ensure the angular edge of the special tool (a) is correctly located in the slot on the camshaft on RH side AND the tool is resting correctly on the cylinder head.
  • Gently rotate crankshaft to ensure proper seating of the tool in the camshaft slot and cylinder head.

Components Assembly on Engine

  • Adjust the tappets clearances as mentioned in tappets adjustment LH.

Cover Cylinder Head

NOTE

  • Ensure the cover-cylinder head seating surface and gasket seating groove are clean.

 

  • Locate new rubber gasket in the groove in cylinder head cover and ensure it is properly and evenly seated.

Components Assembly on Engine

  • Locate cylinder head cover (a) on cylinder head with its narrow slot facing towards the front of the engine.

Components Assembly on Engine

  • Assemble new seal washers (a) on the 4 Nos. Hex flange head bolts (M5) (b).
  • Locate the bolts on cylinder head cover (c) and tighten bolts to cylinder head evenly to specified torque.

Components Assembly on Engine

    See also:

     Royal Enfield Interceptor 650 - Service manual > Camshaft Sub Assembly

    Hold the timing chain in stretched condition and gently rotate crankshaft clockwise to bring LH piston to TDC.

     Royal Enfield Interceptor 650 - Service manual > Reed Valves

    NOTE The reed valve has a rounded edge in one of the corners this should be aligned to the rounded edge in the housing during assembly. Locate reed valves LH & RH (a) in the housings duly ensuring it is seated properly and correctly. Assemble new "O" rings (b) on either ends of the connection tube and locate the reed valves housings LH & RH on the connection tube duly ensuring the connection tube is fully inserted into the housings. Locate reed valves on cylinder head front side with the hose (a) pointing upwards and ensure the mounting holes are aligned. Locate 2 each Hex socket head bolts (M6) (a) on the LH and RH reed valves and tighten evenly to specified torque.

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