1974 SF2 handlebar clamps and instrument panel

murphus

Senior member
It's likely I'm missing something simple, but I'm having an odd issue trying to bolt new handlebars onto my 74 SF2 after replacing the steering head bearings. ND gauges, I believe everything is stock. The issue is that the handlebar clamps mount fine without the instrument panel, flat and true. With the panel in place under the front of the clamps, the clamps are no longer true and will not pull down properly to secure the handlebar, with a huge gap between the bar and the mount/clamps. I've tried with studs mounted in the clamps (not sure what's correct) and with individual bolts. I didn't pay attention during disassembly but do remember the bolts, which were a mishmash and clearly not factory, were very tight coming out, meaning it may have been this way and I simply didn't notice. The bike had been sitting for some time when I got it and I don't think the previous owner was particularly mechanical. Lots of little bodged stuff. If you mount the panel and bars and push the clamp in place using studs, it will not seat properly, leaving a huge gap. If you remove the studs and try using bolts from below, with the panel in place, they will not line up to meet the threads in the clamps if the clamps are placed flat and true. Do I have the wrong bits? Photos show the panel, one of the clamps with studs, the bars mounted without the panel, the bars mounted with the panel and studs in the clamp, and the bars mounted with the panel and no studs. Either way it will not line up. Thoughts? Also, I have no idea why the photos are upside down. Maybe because I'm left handed and taking the photos that way!
 

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  • Clamp with studs.jpg
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  • Clamps bolted with no panel.jpg
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  • Panel in place, clamp with studs - note gap.jpg
    Panel in place, clamp with studs - note gap.jpg
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  • Panel mounted, no studs, clamp sits flat but bolts won't align.jpg
    Panel mounted, no studs, clamp sits flat but bolts won't align.jpg
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The clamps should be fitted with studs.  The instrument  panel side of the clamps is tightened down firmly first, the other side then secures the bars, leaving a gap to the top of the yoke, finished.

If the clamps were to sit flat on the yoke, they wouldn't secure the bars properly, really quite simple. 

piet
 
Well then, there you have it, a simple matter of not appreciating proper order of assembly. My pea brain assumed I pulled the clamps down tight evenly. Thanks Piet.
 
If you had done that, the instrument panel would not have been secured.  This would then lead to the fixing points snapping off within a very short time, a fate that has befallen most of them... hardly any left.  You could of course replace with the later alloy clamp/instrument mount of the triples, but these also have their issues if incorrectly assembled.

piet
 
Mounted up fine now, thanks again Piet. Does seem like it puts a bit of side load on the rear studs, but the bar pulls down tight. Now to take it all back apart to fit the upper bearing dust shield that wasn't there and that I didn't even think about until getting the yokes back together. Good thing it's winter ...
Richard
 
Ralph does them in stainless
but be quick he only has................................probably 32,000 left
CLEM
 
Lost the dust shield in the mess on my garage floor.

Lo and behold I found that an Ariel Square 4 cover fitted perfectly.

Handy tip for the day.
 
Yes, although after getting it back together I thought it should have one, apparently it doesn't use a dust shield after all. Good thing. Don't really want to take it back apart.
 
Mine had a cover washer when I bought it, with a spacer to make it clear the steering head and a rolled over lip to drip water away.

Can't see any in the assembly diagrams on Andy's site.
 
So, I might have been right in my rivet counting headspace! 8)  I only fitted a dustcap when I went to a tapered roller upper. Think I used a Jap cap (cos it rhymed?  :P )
 
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