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Norsjö Carrier 4-Stroke
Model Post Petrol Short and Long version
The driving chain
The driving chain consists of several moving parts and it therefore requires regular
cleaning, lubrication and adjustment in order for it to work as intended. When driving
in the wet, on dusty roads or in other demanding environments, tighter service intervals
than those indicated in the maintenance schedule are required.
Lubricating the driving chain
First of all wipe clean the chain with a soft cloth. If the chain is extremely dirty, it can
be cleaned in diesel or in any other similar solvent. Thereafter, lubricate the chain with
a good quality chain spray.
Adjusting the chain
It is very important that the chain tension is correctly adjusted. If the chain is too taut, it
may cause damage to the bearings in the engine’s gear box and the rear wheel.
Furthermore, if the chain is too taut, it will work ineffi ciently which will impair engine
performance. If the chain is too loose, it may come off. A damaged chain can also cause
damage to the engine block and the chain sprocket.
If the chain is correctly adjusted, the play in the middle of the chain should be between
15 and 20 cm. To adjust the chain tension, fi rst loosen the ring nuts. The rear wheel
should then be moved forwards or backwards by loosening or tightening the chain
tightener’s ring nuts until the correct chain tension is obtained. Tighten both of the nuts
with the same amount of tension.
Ensure that both chain wheels are in line with each other. Adjust if necessary and check
once again that the chain tension is correct.
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Check that the chain tension is correct
by fi rst pressing the chain downwards…
...and then pressing down. If correctly
adjusted, the play should be 15-20 mm.
Ensure that both chain wheels are in line
with each other, indicated by scales on both
sides. The arrows should mark the same spot
on both scales, see picture below. Adjust if
necessary and check once again that the chain
tension is correct.