Adjustment - Honda 1994 NSR 250 SP Setup Manual

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13. ADJUSTMENT

1. Cylinder RC valve
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Turn the fuel cock of the fuel tank on, pass the petrol to the carburettors, turn the cock off, start
the engine and turn the control switch off when the motor registers 'Hi' on the servo wheel at
around 2,000 rpm, then adjust the items below.
i) Remove the radiator/cylinder head and the expansion chamber.
ii) Loosen the lock nut D/E of the adjuster A/B of the cable.
iii) Turn the adjuster A of the power valve cable until the pulley does not shake. To check, turn
the lock nut C (the left screw) on both sides.
iv) Insert your hand from the manifold side of the cylinder ensure that the RC valve fits the
height of the exhaust port (both sides), if it does not, adjust it by adjuster A.
v) Turn the adjuster B of the power valve cable until the pulley does not shake.
vi) Tighten the lock nut D/E of the adjuster A/B of the cable.
vii) Adjust other cylinder following the same method.
viii) Fix the cylinder head/expansion chamber and radiator that have been detached, with the
provided torque.
[CAUTION]
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If the R. side of the RC valve does not fit L. side, adjust either side to the lower side.
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Replace the cylinder head gasket with the new one.
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Apply silicone seal to the mouth of the expansion chamber to prevent exhaust gas leak.
ix) Start the engine to ensure that the RC valve works properly.
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After readjusting, keep the RC valve in 'Hi' position, then draw a thin line on the projection F of
the pulley on the cable guide base do that it can be easily readjusted.