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 Post subject: Engine oil filter?
PostPosted: Thu Aug 03, 2017 4:02 am 

Joined: Sat Jun 11, 2011 11:11 pm
Posts: 464
Location: New Zealand
Seems strange there is no filter before the pump. Could I put a inline fuel filter in there? I know late ones have a gauze. This isn't an option for me.
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 Post subject: Re: Engine oil filter?
PostPosted: Thu Aug 03, 2017 4:24 am 

Joined: Thu Jun 09, 2011 1:12 am
Posts: 238
Location: Queenborough U.K
because it is supposed to have clean oil in a clean tank with a gauze screen , the system has worked ok for 40 odd years on many different models


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 Post subject: Re: Engine oil filter?
PostPosted: Thu Aug 03, 2017 5:08 am 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4603
Location: Milang, South Australia
What tankie said, the people who messed with the system, got to mess with the system more......( check the basic gauze filter.) :think:

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 Post subject: Re: Engine oil filter?
PostPosted: Thu Aug 03, 2017 5:51 am 

Joined: Wed Jun 22, 2011 7:46 pm
Posts: 1334
Location: Kingston, N.Y.
tankie wrote:
because it is supposed to have clean oil in a clean tank with a gauze screen , the system has worked ok for 40 odd years on many different models


In the 70's at least in 1978 when I bought a KH400 removing the screen was a recommended improvement, I was advised several times by my local Kawasaki dealer to pull that screen out, seems Triple riders were locking up their engines due to a plugged screeen, the screen was too small and too easy to plug, I did not pull my screen but it was advised to get rid of it, my current S3 and H1 have no screen I pulled it out over 5,000 miles so far on the S3 :D

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1975 S3 project bike
1974 H1 project bike
1972 Yamaha R5
1974 Yamaha RD350


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 Post subject: Re: Engine oil filter?
PostPosted: Thu Aug 03, 2017 9:16 am 
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Joined: Tue Jun 07, 2011 6:37 am
Posts: 10460
Location: Rio Rancho, New Mexico
You really do need the screen, because some how stuff does get in the tank, usually a piece of the seal on the oil bottle.

https://www.youtube.com/watch?v=AfkChK72S_k

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 Post subject: Re: Engine oil filter?
PostPosted: Thu Aug 03, 2017 11:55 am 

Joined: Thu Jun 09, 2011 11:25 am
Posts: 3137
What we found at Kawasaki back in the early days was that the screen NEEDS to be in place and clean. The main issue with 99 percent of the screen fouling was because owners put just about any and everything that had "OIL" printed on the can or bottle into the tanks, including stuff like Pennzoil 4 stroke oils,

I tis not widely known that a lot of oils with things like additives have those additives that have a basic "grit" in them, Pennzoil especially. The grit is actually solid particles of additives, such as teflon, other solids, which collect on the screens, and stop the oil flow to the pump and engine.

As far as an inline fuel filter in the oil line, I would NEVER go that way, they flow a smaller particle size than the screens do, and plug up far faster than the screens.


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 Post subject: Re: Engine oil filter?
PostPosted: Thu Aug 03, 2017 5:41 pm 

Joined: Wed Jun 22, 2011 7:46 pm
Posts: 1334
Location: Kingston, N.Y.
This is a Meyers snowplow e47 pump filter, I was going to run this in my S3 but decide to just pull the screen and run nothing, Ive done over 5,000 miles so far , the stock Kawi screen leave a lot to be desire in protecting the engine, the meyers pump filter is tall it would take a lot gunk to plug it up Image

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1975 S3 project bike
1974 H1 project bike
1972 Yamaha R5
1974 Yamaha RD350


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 Post subject: Re: Engine oil filter?
PostPosted: Thu Aug 03, 2017 6:59 pm 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9826
Location: North Central NC
Nice. I got some fine brass screen from McMaster-Carr to make filters for petcock tubes. I bet I could roll one up and solder it for the oil filtting too. You're right, it would be much harder to clog that than the low flat stock one.

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 Post subject: Re: Engine oil filter?
PostPosted: Thu Aug 03, 2017 7:47 pm 

Joined: Wed Jun 22, 2011 7:46 pm
Posts: 1334
Location: Kingston, N.Y.
The Meyers screen is a perfect fit too, I did use a dab of the glue in the pic but in the end I did not use it, todays oil is clean nothing to worry about :think: . BTW Yamaha RD don't have a screen and I think the same can be said for Suzuki :|

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1975 S3 project bike
1974 H1 project bike
1972 Yamaha R5
1974 Yamaha RD350


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 Post subject: Re: Engine oil filter?
PostPosted: Thu Aug 03, 2017 10:27 pm 

Joined: Thu Jun 09, 2011 11:25 am
Posts: 3137
Key word in all that is "PUMP", under pressure to push a liquid through it.

Oil tank to oil pump is GRAVITY FEED< and the only real "pressure" developed in that line comes from the actual weight of the oil in the tank, not from a positive pressure pump.

I'm still going to hold out for the stock screen and NO inline filter, has worked well for me on so many bikes.

And, as I said before, not a lot of grit in any two stroke oils of late, so, clean tank, clean oil, tank vent properly serviced and open, gravity feed with no inline filter shouldn't be an issue.


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