7/8" TWISTGRIPS
Most postwar British bikes have 7/8" diameter (21 something mm) handlebars.
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TWIST GRIP T140/COMMANDO

HEN364/18A
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Triumph number 60-7014

DOHERTY TWISTGRIP 7/8"

HENK285
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Genuine Doherty.

DOUBLE CABLE TWISTGRIP

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7/8" diameter with PLAIN style grips. Suitable for double throttle cables.

DOHERTY QUICK ACTION

HEN286
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You can use the same cable, but this grip has a bigger drum, so it opens faster.

TWISTGRIP 7/8" AND AMAL STYLE GRIPS.

HEN78PR
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New Old Stock twistgrip with fresh rubbers.