Vortex ROK DVS JUNIOR, Owner'S Manual

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4.8. Exhaust
Cleaning:
Oils produce carbon deposits or
residues that make necessary the
exhaust to be checked and cleaned, at
least every 10 hours.
1. Remove the muffler from the engine by removing the
springs in the cradle between exhaust and manifold.
2. Unscrew the 3 bolts in the exhaust end cap.
3. Warm up the pipe with a heat source and remove
any carbon deposits by means of a metal brush.
4.9. Pinion
Some ASNs allow the use of Z11, Z12
pinions.
Standard pinion supplied by Vortex is
Z12. 1. By the special tool, remove the snap ring of the
pinion.
2. Remove the pinion by pulling the pinion towards the
outside.
3. Place the new pinion on the crankshaft and secure it
by using the appropriate snap ring.
4.10. Cylinder Head
Oils produce carbon deposits or
residues that make necessary the
cylinder head to be checked and
cleaned, at least every race.
Be aware, cylinder head volume may
be changed after the race, carbon
deposits may cause variations on the
cylinder head volume.
In order to perform this job, we highly recommend
taking the engine off the chassis. However, you may do
the job even with the engine mounted.
1. Unscrew the spark plug (16).
2. Unscrew the 6 nuts on top of the head (19) and the 6
washers (20).
3. Remove the head by pulling it up carefully.
4. Clean the combustion chamber using a rag
moistened with gasoline or solvent.
ASSEMBLING
5.
Check O-RINGS on top of cylinder.
6. Re-place cylinder head carefully in the 6 studbolts and
check that o-rings (22 – 23 – 24) are properly fitted in
place.
7. Insert brass washers (20) and manually screw nuts (19).
8. Tighten cylinder head nuts with the proper tool and
torque, respecting the tightening torque.
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