SOHC.co.uk Forums > CB500/550
Triggers bucket
Ewan 500 K1:
--- Quote from: Oddjob on May 08, 2014, 12:31:22 AM ---Not really any idea Ewan. It's clearly something from around the 70s, something that used the same sort of design as the 500/550s. Maybe a 400/4 or one of the 750s like say a K4/5. I can't think of anything else offhand, maybe Bryan can shed some light on it.
--- End quote ---
..... over to Bryan then ;)
Bryanj:
What size is the piston? Later 750's had a bigger piston and bigger calipers with different bracket arms and of course bigger diameter discs so looks like one of those, if you have a 750 disc about you could always fit that and make it a real mongrel, just as long as you have a good memory or accurate note book!!
Trigger:
Ewan, Oddjob, This is why i am so confused on this 50mm arm. I was going to do a twin disc on the 550F1, and had matched the two 50mm caliper arms and the two wide body calipers up to fit the F1. Was about to start the double disc conversion when someone made me an offer on the bike. So that got sold.
So then i put the 50mm back on the black one.(where it originally came from) And the confusion started. I have a number of arms and calipers but, all the rest are 42mm. I took it that the 50mm was from the F1, F2 , K3 and 750K. The 42mm where from CB250, 400/4, 500T. It was not until Bitsa sent me an arm that was 42mm from a 750K that i understood that the 750K had the smaller one also.
Trigger:
OK, everything fits and lines up. Nornion was right. I have informed him off-line. Cheers for all the info. The F1 i sold must of had a bigger disc. From what Honda CB is another question. Anyone have any ideas?
Trigger:
I have just spoke to the new owner of the CB550 F1 and he said the disc is 295mm. This explains why it fitted OK.
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