.....I have an 01 M2 in the shop at the moment.......oil pump drive gear teeth all stripped off, cam gears all have missing teeth and the oil pump is scrap.
Cause of all this was a small piece of front cylinder exhaust valve spring that'd broken away and worked its way into the pumps scavenge rotors, thus locking the pump.
I have a cunning plan to insert a mesh screen into the scavenge drilling via the blanking plug in the sump, thus preventing such debris from making it into the pump.
I'm gonna spend tomorrow sorting a prototype and will trial it in the customers bike if he agrees to it........only concern is that it might reduce scavenge efficiency
Time will tell, watch this space

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

go for it

That is virtually an identical problem to what happened to Muffin ....can't remember which valve spring broke now ...................so i'd say go for it Maz

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2001 X1 2009 1125CR 2006 Uly X3 2010 Uly a fully Maz'd S1 and a 1991 RS1200 Westwind.

......and whilst you're sleeping on the option of stripping/cleaning the engine to remove any other resulting debris.......if the screen works, it would mean you could skip that option and keep your fingers crossed a little less tightly

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

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IF IT BLEEDS WE CAN KILL IT ,THIS STUFF WILL MAKE YOU A GODDAM SEXUAL TYRANASURUS ,YOUVE BEEN PUSHING TOO MANY PENCILS DILLON .GET TO THE CHOPPER

liking the idea more and more

How common a problem is this with the valve springs breaking up? Is there a need for them to be changed as a service item at a certain mileage? (Proactive rather than reactive)
“only concern is that it might reduce scavenge efficiency” depends on size of mess and how much debris it collects over time ( could just be a case of checking and clean at service intervals )

but sounds interesting idea and could save a whole load of grief should a spring or anything else fail

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Buell Ulysses XB12X 06/08

Excellent idea Maz, something along the lines of a smaller version of oil tank filters fitted to old triumphs or fuel tap filters.

May I suggest you look also at sintered metal filters. I was looking at them to do some special filters for the Guzzi.

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Sept 2017. Email will find me.

what happens when the filter blocks?

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BUELL-Turning riders into mechanics since 1983!!!

The engine wet sumps and hydraulics etc.......

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

Oddly enough, Ironhead sportsters had a mesh screen to stop debris getting back to the pump. It didn't feature with the Evo Sportsters.
That's progress for you.

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http://www.youtube.com/watch?v=Pbi5Ggmk ... re=related

Happy New Year TTT

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I started out with nothing and still got most of it left.

After my recent concerns regarding oil pressure I had a look at the lubrication schematic in my S1 workshop manual yesterday. I was amazed that the position of the oil filter permits dirty engine oil to return to the tank via the scavenge side of the pump and then the dirty oil passes through the feed side of the pump again before flowing through the filter.
is it me or wouldn't it be better to have a filter on the return side just prior to entering the oil tank? If so maybe some enterprising person could come up with such a filter that is not too obtrusive?

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Thread Killer

Lamb built FXR
Lamb Honda XL600 street scrambler
1998 S1 Lightning Strike
KTM 690 Duke
Moulinex Kitchen Mistress blender

There was a post on badweb where they did the return line filter but i cant find it. At the time i looked into the idea and was going to fit small inline filter available for turbo chargers similar to this http://www.ebay.co.uk/itm/All-New-In-Li ... 231576e559
but never got round to doing it.
Maz idea is better, prevents the crap from entering and causing damage to the pump, but how to without splitting and adapting the cases.