Leaking Front Master Cylinder Around Cap

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Ziggy

Member
2016 Thruxton (Not R) leaking around master cylinder cap - 2,300 miles.
Is or has anyone else experienced this problem?
Rubber diaphragm looks good, not bent up or distorted.
I noticed there is no white plastic piece like on Japanese bikes...that the rubber diaphragm fits onto. I looked at parts schematic and it just shows rubber diaphragm.
Cap looks good.
Reservoir is not overfilled.
Screws not over tightened.
 
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