SOHC.co.uk Forums > CB350/400
New to CB400 four and new here! Front brake improvement?
Oddjob:
What pads were those in the end Mike?
Could you see evidence of the pad transfer on the surface of the disc BTW?
Mikep328:
"Several big aerosols of carb cleaner or better still an ultrasonic cleaning bath"
Yes...Definitely will be buying a few cans of carb cleaner!!! Ultrasonic would be nice but don't have one and don't want to take the time to send them out.
"What pads were those in the end Mike?"
They were the Vesrah V series.
"Could you see evidence of the pad transfer on the surface of the disc BTW?"
Yes, as described in your earlier post.
I really appreciate your suggestions and that of everyone else on the forum! VERY IMPRESSIVE forum!!!
K2-K6:
Certainly interesting to get a first hand perspective (yours mike) of before and after on a brake that's relatively unfamiliar to you.
From experience, the seal and how the piston moves freely, with the clean return when released, is the biggest shift in most calipers. All other things being equal, it'll shift most brakes from poor to decent operation at least, the other elements obviously all help, but that free movement is absolutely key to making good use of pads etc.
You can see this often on mot rollers for cars with compromised rear calipers, slight dragging (% illustrated on gauges) pads glazed resulting from this, low service and handbrake effectiveness % all cleared by having the calipers seals cleared and lubricated.
They seem such small differences, but priduce a whole trail of inefficiency within the brakes.
These 400 weren't that bad when new (no not a match for current new system) but stopped decently for example I think it's about 30 ft from 30 mph. Often recollection given nowadays would have you applying the brakes at maximum, then sailing on through a veritable time zone, only then to perform a U turn to come back from next week, and only went out to get a pint of milk ;D
They weren't that bad and, just as demonstrated here, can provide perfectly safe current performance.
Mikep328:
Yes, the brake is perfectly fine now as far as I am concerned. :)
davidcumbria:
Good to hear and as mentioned before no need to settle for there not as good as modern brakes point of view. Reckon I also need to bed my pads in when my rebuild of the rebuild is done. Rd carbs I found this a very good read
https://www.vintagebikebuilder.com/cb550k-carb-rebuild-demonstration.html
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