Oil pumps?

[soonerbillz]

Is there any difference between the oils pumps 250 vs 350 or even 400?
Between years. Are the enduro bike pumps the same as the street versions?

[Arrow]

The castings are all pretty similar.
The early pumps had a few different gear/pulley combinations based on year/market. And also the pressed in steel sleeve arrangement instead of the later thrust washer, for the wormshaft.
The main differences that make the pump what it is are internal gears and pulley combinations and sometimes different size pistons, the most common being 4mm. They can have a priming wheel also, up to certain years, can also be converted in to non priming wheel type if required.
The single cylinder/single outlet bikes are similar but with a single lobed camshaft that can be 'right or left hand'.

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