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Discussion Starter · #1 ·
Was curious if the brake piston on a K4 interchanges with anything else? To be a bit more specific I am curious is the SOHC four pistons interchange.
 

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Sensei
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I was under the impression that the 450 K3/K4 (finned caliper) pistons are the same as the early SOHC 750's... At K5, the 450 went to the "smooth caliper" and the parts are identical to the "G" model 350, the 360, the 500/4 and 550/4's.... I have never actually swapped just the pistons, but as a unit, the calipers will exchange as listed above...... It would be a reasonable assumption that just the pistons would swap, but I personally can't verify that....Perhaps comparing the part numbers on the fiches would help (I don't have All the fiches or parts books)
 

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Here's the list of models that use the same part #:
Part # = 45107-300-003
Part Description = PISTON
Model Count = 10
CB450-K3 1970 450 Super Sport 450 Street
CB450-K4 1971 450 Super Sport 450 Street
CB750K 1969 750 750 Four Street
CB750-K0 1970 750 750 Four Street
CB750-K1 1971 750 750 Four Street
CB750-K2 1972 750 750 Four Street
CB750-K3 1973 750 750 Four Street
CB750-K4 1974 750 750 Four Street
CB750-K5 1975 750 750 Four Street
CB750-K6 1976 750 750 Four Street
 

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Sensei
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Thanks Tom... Can you post that reverse look-up/all applications of a part link in the technical info section please?.... Thank-you, Steve
 

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Discussion Starter · #6 ·
Wow that's some awesome info. This is the best forum ever, it has been more help to me than I can even express
 

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:!:
 

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otr002 said:
They are 304 stainless steel and work great. I did have them on EvilBay at $69 for a while but the costs were kill me. If anybody would like one the cost including postage for the Honda Twins group is $60 US and that only covers postage and the cost to get them made. PM if your interested :)
Rod from OZ :cool:
That beats the hell out of the price for the Ebay stainless ones that I bought for my bike... Great price! Badbisquit, If you're thinking about buying a stainless one (that you'll never have to replace again) then I'd be jumping on that deal!! ;)

GB :mrgreen:
 

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Please set one aside for my CB360! Next paycheck I will be all over this great deal.
 

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66Sprint said:
Thanks Tom... Can you post that reverse look-up/all applications of a part link in the technical info section please?.... Thank-you, Steve
Steve- It's not from a website, Its software purchased from Zedder.com , they have Kaw, Honda, Yamaha, and Suzuki cross reference software. I buy and sell a lot of old bike parts so this is a huge help for me. Of course sometimes the parts have a different number because of differences in color or finish .
 

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wow that is bad, I would try a ebay replace. I just rebuilt mine [73] and there was no pitting. It's luck of the draw I guess! Good luck!
 

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Whatever anyone decides on buying when shopping for a new caliper piston, if you're planning on keeping the bike for a long time, then it's a far better investment to buy a stainless piston. Wherever that source may be.. ;)

Unless you like totally changing out your brake fluid every 2-3 years, and re-bleeding the whole system, just to be sure that no corrosion is taking place because of absorbtion of water, etc..


GB :mrgreen:
 
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