How do they know that the filter reduced oil pressure?
Have they tested it? I doubt it.
My guess is that they have seen a lubrication failure snd a non genuine filter and jumped to a conclusion that suits them.
How do they know that the filter reduced oil pressure?
Have they tested it? I doubt it.
My guess is that they have seen a lubrication failure snd a non genuine filter and jumped to a conclusion that suits them.
I mentioned vegetables once, but I think I got away with it...........
A long time ago (1972) I had a warranty claim rejected by Laurie Summers Ltd, who were the Kawasaki distributors at the time. Bike in question was an F9 Bighorn. Failure was the rotary disc valve had shredded and gone into the inlet port and from there, destroyed the piston. Bike was within warranty period, but warranty was rejected because they claimed there was sand in the carburettor cavity, even though the air filter (genuine Kawasaki!) was installed and all the rubber boots, etc were securely installed. Apparently I should have known to "apply a thin film of grease to the inside surfaces to trap any dirt", even though the owners manual stated nothing of the sort. No consumer guarantees act in those days.
maybe the Aussie guy is just experiencing normal motorcycle warranty delivery
it's not a bad thing till you throw a KLR into the mix.
those cheap ass bitches can do anything with ductape.
(PostalDave on ADVrider)
Probably true.
If you want a laugh at filtration, the Benelli 650 twin is a superb example. Rare in NZ, i've built a couple.
Typical italian roller bearing bottom end - and typical italian filtration, a fine gauze screen in the pump pickup.
Their US distributor convinced them to add a disposable filter element when they wanted to sell in the US.
So they did. A bypass filter. What it does is take some of the oil pump output and run it through a filter element in the center of the engine, underneath the crank. When I worked out where it goes after that I didn't initally believe it. It simply squirts the oil exiting the filter cavity straight up against the underside of the crank. Not into any bearing or collector for distribution, straight onto a balance web.
In this case as I've pointed out to owners, the more restrictive the filter element, the better the oil pressure in the engine as more is put into the lubrication output side of the pump.
I never cease to be amazed by what you can find on line...
A Purolator Pure 1 filter for a LS1 engine has a pressure drop of 4 psi at 40 lpm with hot oil (95?C). LS1 filters have no pressure relief valve. This rises to 7 psi at 15 lpm. Can't imagine a Ninja 400 pump flowing anything like that volume.
Pure 1 filters would generally be considered restrictive; in fact Purolator warn against using them in motorbike engines.
Obviously the pressure drop will be much higher with cold oil, but then the relief valve should open.
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