xr200r 95+ Honda oil pump - what is the advantage over earlier style?

[wazzabie]

Honda changed the style in 1995.  xr200r 95+ Honda oil pump - what is the advantage of the new style over earlier style?

[chadzu]

As I understand it the late pump is higher volume.

[Chuck.]

2 hours ago, chadzu said:

As I understand it the late pump is higher volume.

I calculated about a 50% increase in volume, it is thicker than the old.  The new pump supersedes the old, also no gasket parts for the old versions. 

[wazzabie]

I'm rebuilding the 87 xr200r engine.  Should I swap out the old oil pump with the new style?

[Chuck.]

If the old pump is worn then yes. Honda shop manual will have specs for checking the pump.

[Doogee57]

   Is the new pump the same as a CRF230 pump?

[Chuck.]

I don't know because the product code for the late pump is KBS, #15100-KBS-721. The casting marks on the early pump is 437, late is KSC.

The CRF230 pump is 15100-KHA-940 and replaces the 15100-KPS-900 pump so that implies that it is a replacement for the XR200 pump. And the drive gear tooth counts are different (37 for XR vs 34 for the 230).

However the product codes for both the inner and outer rotors are the same. (KPS), so some parts are shared.

[Doogee57]

11 hours ago, Chuck. said:

drive gear tooth counts are different (37 for XR vs 34 for the 230).

   Yeah, I knew that. I got the whole pump, gear and all, when I was getting the parts to swap over the primary drive ratio to the 230's ratio (to reduce loads thru the trans). I was just hoping that I was getting a higher volume pump. I was 90% sure that the 230's pump was indeed a higher volume piece.