SF2 frame brackets

B

Basketcase

Senior member
Just reversing some PO appalling efforts to make an SFC from a SF2.

PO was a dab hand with an angle grinder and pigeon sh!t stick welds. I want a standard SF2 bike and need to fabricate some frame brackets.

I need to know the dimensions of the regulator mount brackets beneath the top frame rails, i.e.

1. Bracket material thickness

2. Distance to hole centre below rail

3. Diameter of hole

From the bad and incomplete grinding, I have the location for the tabs, and they seem to have been 30mm wide.

I am wondering if the GT frame cross brace approach to mounting the regulator is better, but maybe it fouls with the 36mm Dellorto setups on the SF bikes. Also the SF has a lighter crank so vibration is more of an issue, hence the rubber band approach.

Ta,

Rob
 
Also just noticed in photos on this forum some toolbox mount tabs for the SF with lateral battery tray.

I only have a GT toolbox handy (for longitudinal battery tray).

Is this nearly the same dimensions to get a reference for the top frame tab locations ? I can drill them later, I just want to get the tabs welded.

Unfortunately an SF battery tray and airbox are a few weeks away in the post and I want to make a start where I can. I had forgotten the toolbox.

Otherwise this project will percolate back into a dark corner of the garage and be forgotten like so many of my projects!
 
Hey, Rob. I've got two SF frame (SF1 and SF2) at my place if you want to come by and take some measurements. BTW, have you sourced those spokes (or was it a disc rim?) for your wheel build yet?
qf
 
Hi Quentin,

Thanks for the offer, I made tabs using photos and welded them where the PO kindly left old weld dags.

Had to move the seat tabs and fabricate brackets for mufflers, regulator, toolbox and rear battery tray. Grinding off the crappy front fairing mount was interesting. All the other "SFC brackets" were very badly welded and only needed a tap with a hammer & cold chisel. In fact the seat brackets and battery carrier almost fell off.

Pretty hot weather in Melbourne, but I had a couple of days off and the Laverda project needed to get started.

Spokes are on the way from Andy.

How did your spoke disc rear wheel turn out ? I spotted a couple of other hefty disc cush drive spoke rear wheels on ebay that could be candidates as well.

Cheers,

Rob
 
Sounds like you're on the case. My workshop time has been waylaid by school holidays and work. But I did pick up a Triumph Legend rear wheel, simply because it came with an Akront 4.25x17 inch rim and was half the price of the rim alone. Was a heavy wheel but could probably lose half of it with clever thinking ... and it's a very strong, well made unit, 20mm axle, stainless spokes, excellent cush drive and easily narrowed sprocket carrier (must have been made for a 190 rear tyre!!). Will need to rework the rear disc mount (again!!), but the KLR hub will still eventually go into a new rim as well.
q
 
Another disc carrier adapter!

Good job you bought a large lump of alloy bar last time.

I was going to spray my frame with heat curing engine enamel and leave it in the sun on a hot day. However, the 14 day Melbourne forecast is cool & cloudy - despite the northern part of the state being in a record heatwave.

Maybe I should go to Mildura for the weekend with a few rattle cans.
 
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