VORTEX FACTORY: Via E. Fermi, 5 – 27040 Campospinoso (PV)– ITALY – Tel. +39 0385 765200
VORTEX FACTORY: Via E. Fermi, 5 – 27040 Campospinoso (PV)– ITALY – Tel. +39 0385 765200
OTK KART GROUP srl
Via dei Soprini, 16 – 25080 PREVALLE (Brescia) ITALY-‐Tel. +39 030 6804601 – Fax +39 030 6804698
Rev. 30/09/15
5.11. Cylinder Head
Oils produce carbon deposits or residues that
make necessary the spark plug 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 (4).
2.
Unscrew the 4 nuts on top of the head (3).
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 copper gasket on top of cylinder (5).
This gasket may provoke changes in the
combustion chamber volume.
6.
Re-‐place cylinder head carefully in the four
studs (10).
7.
Insert brass washers (2) and nuts (3).
8.
Tighten cylinder head with the proper tool
and torque.
5.12. Cylinder
Every 30 hours cylinder must be honed.
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.
Take away the muffler from the engine by
removing the 2 springs in the cradle and the 2
springs in the exhaust manifold.
2.
Remove the carburettor from the engine by
unscrewing the specific clamp.
3.
Unscrew the 4 nuts on top of head (3).
3.
Remove the head by pulling it up carefully.
4.
Remove the cylinder with one hand by pulling
it up. To avoid contact with the crankcase, use
the other hand to hold the connecting rod.
Whenever you disassemble the cylinder, we
recommend replacing the cylinder gasket
(9).
