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7-2E
Repair manual KTM MINI 50 air/liquid cooled Art.-Nr. 3.206.028 -E
TROUBLE CAUSE REMEDY
Engine fails to start Operating error Open fuel tap, replenish fuel, do not use choke
Fuel supply interrupted Close fuel tap, loosen fuel hose at carburettor, lead into a
basin and open fuel tap,
– if fuel leaks out, clean carburettor
– if no fuel leaks out, check tank ventilation, i.e. clean
fuel tap
Electrode distance too large Reduce electrode distance (0.60 mm) (0.0236 in)
Plug fouled by oil, wet or bridged Clean spark plug or renew
Ignition wire or spark plug
connector damaged
Dismount spark plug, connect ignition cable, hold to
ground (blank place on engine) and actuate kickstarter, a
strong spark must be produced at the spark plug
– If no spark is produced, loosen spark plug cap from
ignition cable, hold about 5 mm from ground and
actuate kickstarter
– If a spark now occurs, replace spark plug cap
– If no spark is produced, control ignition system
Kill button wire or short-circuit
switch faulty
Disconnect black coloured cable from short circuit button
at ignition coil and check ignition spark. If the spark is
O.K. repair defective part of cable or ignition switch
Loose ignition cable connectors Inspect cable connectors
Spark too weak Examine ignition system
Water in the carburetor and jets
blocked
Dismantle and clean carburetor
Engine without idle running Idle adjusting bolt out of
adjustment
Readjust idle running or replace idle adjusting bolt
Ignition system damaged Examine ignition system
Wear Overhaul engine
Less power of engine Air filter obstructed Clean or renew airfilter
Fuel supply partly interrupted or
blocked
Blow through fuel pipe and clean carburetor
Loss of compression due to loose
spark plug
Tighten spark plug
Exhaust system damaged Check exhaust system for damage
Engine has not enough
preignition
Check and adjust ignition
Reed paddles tensionless or
damaged, surface of reed valve
housing damaged
Replace reed paddles or reed valve housing
Wear Overhaul engine