Recognising Strange Noises - MINSK Repair Manual

Recognising Strange Noises
Sometimes a weak part will begin to rattle against other parts on the bike.
Being able to recognise these sounds and do something about it will help you no
end in your pursuit of trouble free Minsk adventure.
Near the Exhaust Pipe
If the screw at the front end of the exhaust pipe
loosens up then you will notice a loud, tinny sound
coming from down near your right foot and oil will
also spit out onto your shoe. Tighten it up with the exhaust pipe tool.
From under the Petrol Tank
If the petrol tank comes loose then you will hear a gong type noise every time
you go over a bump. Check that the two rubber plugs supporting the front of the
tank to the frame are still in place. Otherwise tighten the two bolts on either side
of the tank and make sure the rubber plugs around those bolts are sound.
Under the Rear Wheel Mud Guard
If the gear rack at the back of the bike breaks loose or some of its screws fall
out then it is possible for the mudguard to touch the tyre and wear it down. If there
is a muffled, high pitched sound coming from the rear then stop pronto and fix it.
From the Chain
A loose chain will cause a tapping sound to the rear of the bike especially when
you turn down the accelerator. This happens when the chain rattles against the
plastic housing at the rear of the bike. Tighten the chain immediately.
From Inside the Clutch Near Your Left Foot
Under the clutch case near the gear changer is the clutch and the clutch chain.
This chain connects the engine shaft (which is attached directly to the cam disk
and piston) to the clutch. The chain can stretch and wear down and touch the sides
of the case. A stretched clutch chain will cause a grinding sound similar to
footsteps on gravel down on the left-hand side of the bike. Get a mechanic to open
up the casing and replace it. You do not want this chain to break on you.
From Under the Piston
If you hear a nasty grinding sound from inside the engine then there is a good
chance that the cam disk is rubbing against the sides of the engine and is about to
seize. This will happen if the petrol does not have enough oil in it.
©Digby Greenhalgh 2000
Minsk Repair Manual
45