Michael Curry
Member
Brian is correct.......
Twenty years ago, when karting was popular, there were several companies making conversion drums.
Tomar made their BLUE three tab drums in Big (Horstman) pattern and Small (Tomar, SMC, Bully) pattern.
Big pattern is 1.0" across the flats.
Small pattern is .800" across the flats.
TS Racing made a vast assortment of drums with all combinations of Small and large pattern, mixed with 3 tab, 4 tab, and later 8 tab rims.
They also made a 3 tab and 4 tab drum for their own bolt on belt drive sprockets.
The Reaper and X5 took a square drive for the 7/8" ID drives.
The Red Hawk was the same square pattern but had a different ID and bushing for the outboard mounting on a Mini Cup.
Buller also offers a Turbo Pattern for the high HP stuff.
It was an inventory nightmare, let alone trying to figure out what the customer wanted, which was usually compounded by them not knowing the exact model of clutch they owned.
Viper/Gator made over 30 different drums at one point after TS and Tomar quit offering their broad selections, but even they have toned it down to only 21 different Small pattern drums and two Turbo Pattern drums.
Long story short...........get a Viper Style 8 tab small pattern drum and two new 8 tab linings with the gear tooth count you need.
Money well spent in the long run until you decide you need a new clutch. Any good kart shop in the USA can supply you with the parts needed.
Twenty years ago, when karting was popular, there were several companies making conversion drums.
Tomar made their BLUE three tab drums in Big (Horstman) pattern and Small (Tomar, SMC, Bully) pattern.
Big pattern is 1.0" across the flats.
Small pattern is .800" across the flats.
TS Racing made a vast assortment of drums with all combinations of Small and large pattern, mixed with 3 tab, 4 tab, and later 8 tab rims.
They also made a 3 tab and 4 tab drum for their own bolt on belt drive sprockets.
The Reaper and X5 took a square drive for the 7/8" ID drives.
The Red Hawk was the same square pattern but had a different ID and bushing for the outboard mounting on a Mini Cup.
Buller also offers a Turbo Pattern for the high HP stuff.
It was an inventory nightmare, let alone trying to figure out what the customer wanted, which was usually compounded by them not knowing the exact model of clutch they owned.
Viper/Gator made over 30 different drums at one point after TS and Tomar quit offering their broad selections, but even they have toned it down to only 21 different Small pattern drums and two Turbo Pattern drums.
Long story short...........get a Viper Style 8 tab small pattern drum and two new 8 tab linings with the gear tooth count you need.
Money well spent in the long run until you decide you need a new clutch. Any good kart shop in the USA can supply you with the parts needed.