Can you recommend any sources Spuggy ?
Searching for a bracket to fit a high mounted exhaust
- Thread starter Foggy
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Can you recommend any sources Spuggy ?
spuggy
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Over here, I'd probably check McMaster Carr first. But Flea Bay would probably be my go-to otherwise.
So, I'm gonna SWAG that it's an M8 bolt (which requires a 8.2mm bore size for clearance), that the head size should be 25mm, and that the internal diameter of the rubber bush is 15mm or thereabouts. Which seems reasonable.
Countersunk finish washers (may be available in either flat or cone styles):
Stainless:
M3M4M5M6M8M10 Stainless Steel Screws Cup Washers Countersunk Finishing Washer
Countersunk Washers Finishing Washer Fasteners for Screw Parts Washers
Alloy:
ZSPEC M8 Fender-Finish Washers for M8 FHSC Flat-Head Fasteners, Billet, 10-Pack
M4/M5-M8 Aluminium Countersunk Washers DIY Washers For Countersunk Head Screws
Most of the alloy washers seem to be 6061, and may be available in all colors on anodized.
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spuggy
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Stainless countersunk M8 bolts:
[https://www.ebay.com/itm/2746389199...NK BOLTS M5 M6 M8 CSK ALLEN KEY SOCKET SCREWS
^^^ UK stockist, length increment by 5mm up to 80mm, and then by 10mm up to 150mm long.
Or these 316 Stainless Steel Hex Socket Bolts Countersunk Flat Head Screws M3-M16
M8 length increment by 5mm up to 70mm, then by 10mm to 100mm maximum length.
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spuggy
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Unthreaded Alloy Standoff Spacers for M8 bolts: M4 M5 M6 M8 M10 6082 ALUMINIUM STAND OFF SPACERS COLLAR BUSHES BONNET RAISERS
^^ UK stockist, 1, 2, 5 or 10 pack options, diameters 12/16/20mm, lengths 5-50mm in increments of 5mm.
Stainless standoff spacers for M8 bolts: Stainless Steel Spacer - Standoff Collar Stand Off Spacers | M5 | M6 | M8 | M10
^^ Uk Stockist, 1, 2, 5 or 10 pack options, diameters 12.7/16/20mm, lengths 1/4, 3/8, 1/2, 3/4 & 1" (LOL)...
Obviously, you could stack multiple standoff spacers to achieve the exact length(s) you want. Or someone with access to a lathe could spin you up 8 spacers in pretty short order, I'd think.
At which point I got kind of bored. There's literally 100s of suppliers of standard items like these... Moreover, once you start poking around listings like these, Flea Bay will suggest multiple similar ones too.
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Thanks for all the info Spuggy, now I know what to search for there's loads as you say. The McMaster site looks great but I'm sure I can find a UK equivalent. My next step is to dismantle what I have and get some precise measurements. Thanks for all your help.
Sorry mate, you can't mess with the length of the shoulder as that is critical in supporting the rubber bush/silent block.
The shoulder length is 19mm, I'll get the diameter a bit later today when I open the workshop, but it will be the same as a standard Ducati shoulder bolt.
Great idea to source those bits to make up custom shoulder bolts and spacers.
I had to do the same to replace some shouldered body bolts on the other bike. They were M5 with a 2mm shoulder, so I found some ally spacers the right size from China and they work well with Titanium bolts, except I have to remember to catch the little spacer/shoulder when I take them out.
It might even work out cheaper or not much more to get a local person with a lathe to spin some top hats up from 25mm ally bar.
Dacs knows someone in Norwich and there is Hutch at HTE motorcycles in Beeston. htemotorcycles@yahoo.co.uk. they are all over the place if you look.
Alec at English Electric Motor Company in Redgrave has got a lovely lathe.
Good point about the shoulder MrGazza I'll make a note of that .... and useful local contacts too. Cheers
spuggy
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You're welcome. Yeh, test fit it all, and measure. Then measure again
It bothered me that my statement here was a little hand-wavey - came back to expand a little.
As Mr Gazza observes, the factory supported the rubber bushing on both sides; there's a washer behind the silentbloc (apart from that one place on the M900 parts diagram that I think is a mistake), and the head of the shouldered bolt contains it at the front, so the bush is all sandwiched in place and constrained.
The back end (between the hanger and whatever it fits to, frame or crankcase/prop stand bracket, whatever) - is just spacer dimension & exposed thread.
What I really like about Mr Gazza's approach, is that the end result looks very tidy - it could have come from the factory. I did wonder - as he mused earlier - if you could utilize a factory part - like the washer the factory used on the oil cooler fixings. Which may be 84110011C, which some describe as "fairing mounting cap" - and might be available in silver or gold (seen both).
This would likely limit the availabilty of M8 bolts though, as that washer wants to be used with a low profile socket cap head, which don't look to be as readily available in longer lengths (over 60mm). That may even be long enough...
Measuring it all up and figuring out what's needed would seem to be key...
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Yes thanks for the extra info. I can see the washer on the parts map and will make a note when I dismantle. I don't expect I'll need a bolt longer than 60mm so hopefully all should be ok.
spuggy
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I'd SWAG that, on the bottom-left hanger (the longest bolt used on the DP kit), the distance from the front of the bush housing in the hanger to the front edge of the prop-stand bracket, with the DP spacers fitted, seems to be around 45mm.
So the length of the bolt you'd need would be that measurement, plus:
- the thickness of the prop-stand bracket (less locating relief/countersink), and
- the length of the thread necessary to screw into the crankcase (and support the bike on the prop-stand).
- the added thickness of the washer accepting the low-profile socket cap head
Not to say that low-profile socket caps in that length aren't available - just that a 3 minute search on Flea Bay turned up a UK supplier offering ones up to 60mm..