Searching for a bracket to fit a high mounted exhaust

Mr Gazza · 01-06-2024, 01:34 PM

Ah! just seen this.
The short answer is that you might not need longer bolts, but it's something to check for sure.

The left side engine bolts are a little longer than the right side ones due to the side stand bracket already holding the left hanger off a bit further. It's possible that you might not even have to space the left side bottom.
So if you need longer ones on the right, then it might be possible to get some left side ones. (trying not to call them left hand to avoid confusion, they are all RH thread.)
Moto Rapido would almost certainly be able to source those.
If requiring longer 8mm shoulder bolts for the upper mounts then there may still be hope, as early models used one shoulder bolt to fix an earth strap and had room for a nut on the end. Perhaps these are available too?

The reason I made up some specials was that I discovered a previous owner had improvised (I'm being generous here!) some shoulder bolts by winding some insulation tape round some standard bolts.. Thanks whoever you are!
I rather liked the idea of the top hat adapters that were sold by TPO at the time, but they were very expensive, more so to get them from the US and now not in business I think?

My answer was to buy some 25mm aluminium bar and get a mate to turn some up to my design.
They mimic the shoulder @ 12.5mm diameter x 19mm long with a through hole 10mm clearance for a standard M10 bolt.
The head mimics the cup washers found on the oil cooler and headlamp mounts.
I made the counterbores for low cap heads, but I'm now thinking of a redesign using countersunk as I can't find any Ti low heads the right size.

The upper ones are sized for M8, but the shoulder length and head remains the same.

I've just read that they should have washers under the shoulders, which makes a lot of sense, since the bearing surface is a mere 1mm wide. I'm thinking as I type that a full set of thick washers from my 25mm bar would be good, including a little counterbore to support the end of the shoulder/top hat.

If I do commission another set with countersinks instead of counter bores and with special washers, I'll make some drawings and pass them on.
I could measure up my originals anyway if anyone wants the dims. The original drawings are held in cyber-limbo on a long inaccessible file!! Sorry.

01-06-2024, 01:34 PM	#14
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,855	Ah! just seen this. The short answer is that you might not need longer bolts, but it's something to check for sure. The left side engine bolts are a little longer than the right side ones due to the side stand bracket already holding the left hanger off a bit further. It's possible that you might not even have to space the left side bottom. So if you need longer ones on the right, then it might be possible to get some left side ones. (trying not to call them left hand to avoid confusion, they are all RH thread.) Moto Rapido would almost certainly be able to source those. If requiring longer 8mm shoulder bolts for the upper mounts then there may still be hope, as early models used one shoulder bolt to fix an earth strap and had room for a nut on the end. Perhaps these are available too? The reason I made up some specials was that I discovered a previous owner had improvised (I'm being generous here!) some shoulder bolts by winding some insulation tape round some standard bolts.. Thanks whoever you are! I rather liked the idea of the top hat adapters that were sold by TPO at the time, but they were very expensive, more so to get them from the US and now not in business I think? My answer was to buy some 25mm aluminium bar and get a mate to turn some up to my design. They mimic the shoulder @ 12.5mm diameter x 19mm long with a through hole 10mm clearance for a standard M10 bolt. The head mimics the cup washers found on the oil cooler and headlamp mounts. I made the counterbores for low cap heads, but I'm now thinking of a redesign using countersunk as I can't find any Ti low heads the right size. The upper ones are sized for M8, but the shoulder length and head remains the same. I've just read that they should have washers under the shoulders, which makes a lot of sense, since the bearing surface is a mere 1mm wide. I'm thinking as I type that a full set of thick washers from my 25mm bar would be good, including a little counterbore to support the end of the shoulder/top hat. If I do commission another set with countersinks instead of counter bores and with special washers, I'll make some drawings and pass them on. I could measure up my originals anyway if anyone wants the dims. The original drawings are held in cyber-limbo on a long inaccessible file!! Sorry. __________________ Last edited by Mr Gazza; 01-06-2024 at 01:36 PM..