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Graeme,

I am the second owner of this Norton-bought it in 1972. It was a 1970 Dunstall 810 (now 750) and it had the triple discs on it when I bought it in 1972-the previous owner having installed the rear disc. In 1970 triple discs were common as rocking horse poo. Anyway the front discs are Dunstall dual discs where the calipers are cast into the fork legs and as far as I know were the first production dual discs on the market. The rear was made by Kosman Specialties and was originally designed for flat track racing. The Dunstalls work pretty well for a period brake system with the proper modifications. The Kosman isn't that great due to the original Hurst/Airheart master cylinder and single puck caliper. It never gets used on the track anyway but comes in handy for off track excursions-luckily I've only done that twice in my racing career and once was when I grenaded the engine at Pueblo.

Cheers,

Tom Kullen
AHRMA 44x

<blockquote data-quote="utahnorton" data-source="post: 75228" data-attributes="member: 2273">Graeme,&nbsp; &nbsp; I&nbsp; am the second owner of this Norton-bought it in 1972.&nbsp; It was a 1970 Dunstall 810 (now 750) and it had the triple discs on it when I bought it in 1972-the previous owner having installed the rear disc. In 1970 triple discs were common as rocking horse poo. Anyway the front discs are Dunstall dual discs where the calipers are cast into the fork legs and as far as I know were the first production dual discs on the market. The rear was made by Kosman Specialties and was originally designed for flat track racing. The Dunstalls work pretty well for a period brake system with the proper modifications. The Kosman isn&#039;t that great due to the original Hurst/Airheart master cylinder and single puck caliper. It never gets used on the track anyway but comes in handy for off track excursions-luckily I&#039;ve only done that twice in my racing career and once was when I grenaded the engine at Pueblo. Cheers,Tom KullenAHRMA 44x</blockquote>

[QUOTE="utahnorton, post: 75228, member: 2273"] Graeme, I am the second owner of this Norton-bought it in 1972. It was a 1970 Dunstall 810 (now 750) and it had the triple discs on it when I bought it in 1972-the previous owner having installed the rear disc. In 1970 triple discs were common as rocking horse poo. Anyway the front discs are Dunstall dual discs where the calipers are cast into the fork legs and as far as I know were the first production dual discs on the market. The rear was made by Kosman Specialties and was originally designed for flat track racing. The Dunstalls work pretty well for a period brake system with the proper modifications. The Kosman isn't that great due to the original Hurst/Airheart master cylinder and single puck caliper. It never gets used on the track anyway but comes in handy for off track excursions-luckily I've only done that twice in my racing career and once was when I grenaded the engine at Pueblo. Cheers, Tom Kullen AHRMA 44x [/QUOTE]

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