Caliper rebuild kit
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  1. #1
    Member mikemo's Avatar
    Join Date
    Aug 2019
    Tampa Bay, Florida

    Caliper rebuild kit

    Hello all.

    Bike is a 1982 CB450SC. I disassembled and cleaned the master cylinder because the little bleed hole was clogged. The inside of the brake system seemed fairly clean, but I thought to be thorough it would be good to disassemble the caliper and make sure nothing is dirty/corroded down there. The FSM says you can't reuse the piston seals, so I'm looking for a rebuild kit. Any suggestions? Are the reproduction parts as good as the Honda parts?

    Also, I noticed that there are replacement pistons that are made of stainless steel, instead of chrome plated steel. Any opinion on those?

    Mike M.
    1982 CB450SC Nighthawk
    2 x 1988 Toyota MR2 Supercharged (one finished, one under reconstruction)
    2018 Honda Civic SI

  2. #2
    Senior Member Alan F.'s Avatar
    Join Date
    Aug 2009
    #8 dust seal and #14 piston seal are all you need to rebuild, just clean everything out really well. You may need to clean out the seal grooves with a dental pick type tool to get all areas cleaned out. Lube everything with new brake fluid and reassemble.

    Stainless brake pistons are a good choice if you need to replace the pistons you have. Your old pistons may have pitting that can can cause leaks, chew up new seals, and prevent them from building brake pressure. Stainless steel will have a longer life span.
    "That awkward moment when you end up using advice from an ichiban moto video"
    CB250 Nighthawk projects 92,93,92.
    81 CM400C Sold
    93 CB750 Nighthawk Sold
    73 CB750K3 Long term project stuck in the 'parts collecting stage.'
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  3. #3
    Super Moderator longdistancerider's Avatar
    Join Date
    Oct 2011
    Vancouver Washington (text 408-239-9580)
    Plus 1 on the SS pistons. I usually replace 12 and 13 unless they're in good condition. Most of the time they're starting to rot.
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 nuts and bolts restore in progress and
    Road Trip or "where's Jim now?"
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