Author Topic: CB500K1 brake bleeding question  (Read 656 times)

Offline AndyH

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CB500K1 brake bleeding question
« on: October 12, 2018, 10:25:20 AM »
Quick Q:  when bleeding the front brake, do I need to put the rubber diaphragm back in along with the cap, each time I squeeze the lever? TIA
Andy

1971 CB750K1
1972 CB500 Four K1 (SOLD)
1978 Suzuki GS750E
Previously....
1967 Honda Sports 90
1971 Yamaha CT2 175
1973 Yamaha RD250
1975 Kawasaki KX125
1979 Yamaha XT250T
BMW R65
BMW R80
BMW R100LT

Offline Johnwebley

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Re: CB500K1 brake bleeding question
« Reply #1 on: October 12, 2018, 10:35:28 AM »
No.but be careful that the spurt doesn't splash on paintwork

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Offline AndyH

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Re: CB500K1 brake bleeding question
« Reply #2 on: October 12, 2018, 11:06:09 AM »
No.but be careful that the spurt doesn't splash on paintwork

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Yep, that was my worry John.
Andy

1971 CB750K1
1972 CB500 Four K1 (SOLD)
1978 Suzuki GS750E
Previously....
1967 Honda Sports 90
1971 Yamaha CT2 175
1973 Yamaha RD250
1975 Kawasaki KX125
1979 Yamaha XT250T
BMW R65
BMW R80
BMW R100LT

Offline hairygit

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Re: CB500K1 brake bleeding question
« Reply #3 on: October 12, 2018, 11:33:04 AM »
Remove the tank is the safest option!

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Offline K2-K6

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Re: CB500K1 brake bleeding question
« Reply #4 on: October 12, 2018, 01:05:04 PM »
If it "spurts" alot it would indicate that the primary seal is not in good condition.

As you move the lever initially, it should firstly close off the route to the reservoir and so direct the fluid down line to the caliper.

If this first action is slow or impaired,  then the fluid starts to come back into the reservoir, giving the spurt. Also, a longer lever travel in use.

Severe wear of this makes it difficult to bleed the system as well.

Offline Bryanj

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Re: CB500K1 brake bleeding question
« Reply #5 on: October 12, 2018, 02:56:04 PM »
But you also get a spurt when you release the lever and pressure is released via the tiny hole

Offline AndyH

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Re: CB500K1 brake bleeding question
« Reply #6 on: October 18, 2018, 04:16:54 AM »
Thanks all for the comments/advice.  All done, and no spurt spillage!! ;D
Andy

1971 CB750K1
1972 CB500 Four K1 (SOLD)
1978 Suzuki GS750E
Previously....
1967 Honda Sports 90
1971 Yamaha CT2 175
1973 Yamaha RD250
1975 Kawasaki KX125
1979 Yamaha XT250T
BMW R65
BMW R80
BMW R100LT

 

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