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While rummaging through my extra rear master cylinders this morning (looking for a good one for another member), I discovered that I had two distinct types. Outwardly identical at a glace, but two different bore sizes??!! WTF??
The 'standard' bore size for these is supposed to be 1/2". But I've got two that have 14mm bores (about .551") and uses what looks like may be a 14mm front master piston/seal set-up. Now, these were on a couple of XS11s, but that obviously doesn't mean they're OEM to those bikes...
These aren't the LH/XJ rear; other than the internal bore parts, everything else is the same. They do all have the 'special' type body/reservior as opposed to the standard style.
Anybody got an idea? Another 'slight' change that doesn't appear in the parts book? A newer 'complete' replacement part superceding the original? Or something swapped in off another Yamaha model?
The 'standard' bore size for these is supposed to be 1/2". But I've got two that have 14mm bores (about .551") and uses what looks like may be a 14mm front master piston/seal set-up. Now, these were on a couple of XS11s, but that obviously doesn't mean they're OEM to those bikes...
These aren't the LH/XJ rear; other than the internal bore parts, everything else is the same. They do all have the 'special' type body/reservior as opposed to the standard style.
Anybody got an idea? Another 'slight' change that doesn't appear in the parts book? A newer 'complete' replacement part superceding the original? Or something swapped in off another Yamaha model?
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