A lot of those big Zeds (900R ZZR1100) had a gauze filter over the pickup point for the oil pump,over time and especially those fond of using gasket goo,this filter became clogged. Usually the pump could suck enough oil to do at moderate speeds,but when the numbers crept up,then the engine let go.Le_Fromage_Grande wrote: ↑Tue Jan 12, 2021 10:16 am The one I looked at had a piston circlip in the bottom of the sump and a ton of instant gasket, so someone had the top end off at some point and did a really shit job.
Back then when I bought a bike,one of the first jobs I did was drop the sump and have a look. I caught my 900R just in time,it was well on the way to going pop.
There used to be a shop (Oxford Motorcycles?) who did a replacement/modded sump pan with an inspection plug,so you could check the filter without removing the sump. I made my own by stealing their idea. The plug was a Kawasaki part.