750SF2 single seat mounting

mikeb

mikeb

New member
Location
new zealand
Hi
Possibly overthinking things (again)...

The base of the single seat on my 750SF2 has seen better days (pic 1).
It sits on 2 rubber bungs near the front half, and high on the mounting bracket at the rear (see pic 2 - which shows it will sit high when bolts fitted).

So it is mostly not in contact with the frame rails, even tho the seat bottom looks like it used to in past times. So I assume the fibreglass body takes quite a bit of force. I don’t want the fibreglass to break. The manual shows no rubber mounts.

Anyone know if it should sit like this?

I could:
  • extend the slot on the mounting bracket holes so the seat underside sits down on the frame rails.
  • Put some rubber blocks on the frame rails to support the seat weight.
  • [insert your good idea here]
  • Do nothing.
Votes?
thanks
 

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Find some rubber bungs to support the seat base as far as you can, these seats are known to simply break off the hump if inadequately supported.

Get it level to the frame rails and modify the rear bracket to suit if necessary.

piet
 
On several rebuilds of bikes over the years ( of various makes) I have searched for rubber bungs of the correct shape/size . Mostly fruitless. So I started making my own . It is possible to buy "dapping block " rubber of different thickness ( this is thick/ firm rubber used by jewellers) and then machine in the lathe with a sharp high speed steel tool to obtain the correct size /shape. I usually start by pressing out an oversize diameter using a sharpened tube and then machine after. The final finish can be honed/smoothed/shaped if needed with 80 grade abrasive abranet.
 
ok thanks for the suggestions. i'm thinking some firm adhesive rubber/EPDM strip, 15x15 (or whatever, yet to measure) and stick it along the frame rails. easier than a series of bungs to fix and to hold the seat weight evenly. and maybe adjust the rear bracket holes if necessary.
 
I’ll post pics of my single seat but yours is missing the front retainers on the fiberglass base that “lock into” the tangs on the frame. You could attach L brackets to the seat base and then feed in a bungee cord under the frame rails onto the L brackets. The rear brackets alone won’t prevent the seat from pivoting backwards, but your weight should keep it in place.
 
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