Oil Problems
Filters
Sump Filter
• black plasticy bits – front cam chain guide worn and damaged
• large metal pieces – gear dogs from 5th main and 3rd pinion gear, broken gear teeth, bearing cages
• aluminium – piston holed, piston skirts, clutch basket tongues, kick start spring anchor, casing pieces, worn front cam chain guide
• dirt from clutch friction plates
• copper from crank washers
• petrol from flooding carbs
• filter ruptures from oil return or acceleration while cold oil is too thick
Side Filter
• find same things in the filter only smaller size
-----------------------------------------
Oil Pump
Low Pressure
• filters blocked
• pump rotor worn
• oil passages dirty or blocked
No Delivery
• no oil
• filters blocked
• pump drive gear broken
• shaft broken
• rotor assembly broken or damaged
• oil passage blocked
• restrictor blocked
-----------------------------------------
Oil Leaks (various locations)
• crank seal - behind the alternator
• clutch push rod bush and seal, scroll down - replace short rods with a long one
• drive shaft seal - behind front sprocket, often only needs the nut tightening
• engine base - may actually be migrating from the front pipe or cam chain tensioner nut
• head gasket - often resulting from lack of head nut torque control
• crankcase breather - too much oil, worn rings
• cases - unclean or marked surfaces, torn gasket
• fork seals