SOHC.co.uk Forums > CB350/400
Brake bleeder valve thread size?
McCabe-Thiele (Ted):
I've checked my 400, it measures more like a M7 as McMaz says,
I checked the nipple thread o/d against my M7 thread gauge tool certainly not M8.
McMaz:
I think the M8 refers to to spanner size of the nipple, not the thread size
McCabe-Thiele (Ted):
--- Quote from: McMaz on June 04, 2026, 04:07:13 PM ---I think the M8 refers to to spanner size of the nipple, not the thread size
--- End quote ---
Yes mine are M8 for a ring spanner, thread definitely looks like M7.
Skoti:
--- Quote from: Mikep328 on June 04, 2026, 05:49:47 AM ---I use them on other bikes. It more convenient/faster than futzing around with vacuum or pressure bleeders on such small systems. I have both and use the pressure bleeder for cars but I can bleed motorcycle brakes faster using the bleeder valve when you factor in the time it takes to get the vac or pressure bleeder out, set it up and then put it back away.
--- End quote ---
Never found a need for this on my 750, I normally just loosen the bleed nipple and let it gravity bleed without pumping the brake lever.
Tighten the bleed nipple when bubbles stop appearing and Bob's yer uncle.
Brake fluid change every 2 years is enough to keep any corrosion at bay.
Good luck
Oddjob:
Seem to recall Mike it's a M7 x 1.00.
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