SOHC.co.uk Forums > CB500/550

fitting a pattern seat

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TonUp:
I have recently acquired a CB550F2, it came with a pattern seat 'fitted'. It rocks backwards and forwards pivoting on the lock / hinge bracket. None of the rubbers touch the frame.

Anyone got any tips on getting it to fit better? I have adjusted the lock pin as short and tight as possible and this has improved things a little. I might try relocating the hinge bracket next.

A simple fix (or so I thought) would be to remove and pack the rubbers but they are riveted on.  :-\

LesterPiglet:
Drill the rivets out and use self tappers.

s7paul:
I bought one of those for my 500 (assuming it's the one with the fibreglass base). It looked great, but never fitted properly.  They clearly went to a lot of bother to tool-up and make it, but the problem was that the seat base was the wrong height in relation to the frame tubes, so when you bolt the hinge on (which governs the vertical position of the seat) it sits too high.  Also, as you say, the rubber feet are in the wrong place and/or the wrong thickness, so they don't all touch the frame. Consequently the seat tends to rock.

I eventually got fed up with it, sold it, and bought one of the replica seats with a metal base from CMS.  It fits much better; the only compromise being that it doesn't have Honda written across the back (because Honda stopped people using their name on reproduction items).

TonUp:
A friend of mine has offered to make some nylon spacers for the seat. I will update later when I get it sorted.

TonUp:
update: A mate of mine made the spacers;
5 black nylon spacers;
13mm thick, 25mm diameter, 5mm center hole

Drilled out the rivets then used some self tappers to fix spacer with a bung to the seat. Result! Seat fits perfect now.  :D

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