Archive for the ‘sump’ Tag

XS650: 650 Central Sump Extensions   Leave a comment

650 Central has started producing a sump extension kit. MCEN40-2750. You wont find it listed yet.  A serious performance modification. 2 3/4″ deep (69.85mm).
Lowers the oil level freeing up the flywheels and clutch basket. Less flywheel drag implies better dyno numbers and lower oil temps.

Kit price … $135.

  • extension-(cast for better heat dissipation),
  • SS bolts
  • 2 gaskets


SE1 .. oil sump kit

 oil sump kit


Hattip Alvin.

650 Central … Mike “Mercury” Morse …

“To race is to live—all the rest is just waiting”

Posted September 26, 2012 by xscafe in Motor - Cases, Motor - Oil

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XS650: Sump Extensions   Leave a comment

Was asked yesterday about sump extensions. Do they exist? Who makes them? Are they effective?

I know of 2 suppliers. Ivan Hoey in Australia advertises his on the Australian XS650 site. Racers Bits. Scroll down.


1 .. Ivans sump extension

Ivans sump extension


And Twinsinn in Germany. Go to ‘Shop’ and then to ‘Ölfilter, Ölpumpe…’. Scroll down. Part number Öl042.


2 .. from Twins-inn in Germany

from Twins-inn in Germany


This requires removal or repositioning of the side-stand for models later than ’76. But has cooling fins. And is a little deeper. I have one of these in one of mine. The other has a sump plate modified for an auto spin-on filter. An extension would make this too deep.

I also have 2 of these. No idea who makes them. One was on a parts bike. The other in a box of bits I acquired from somewhere.


3 .. unknown european producer

unknown european producer


I’ve filled this. Takes 200ml. An 8% volume increase. No function loss. Follows the sump plate contour. Fits with the sidestand in place too. Weighs 220g.

Posted March 7, 2011 by xscafe in Motor - Cases, Motor - Oil

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