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Standard gap size should be between 3-6 thou. See DAM6486, DAM6487, DAM6488, DAM6490, DAM6492 for alternatives. This type is for the 1275cc crankshaft only which has a raised step for the primary gear to sit on. Race applications can be increased plus 3 thou. Thrust washer 0.120-122”(3.04-3.09mm). The measurement is taken as plus or minus one to the size hence the two thousands tolerance on each part number.

Primary Gear Thrust Washer 1275-1300cc .120" thick | Classic Mini

Primary Gear Thrust Washer 1275-1300cc .120" thick | Classic Mini

Primary Gear Thrust Washer 1275-1300cc .120" thick | Classic Mini
Part No: DAM6489
CLEARANCE Price $28.96
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List: $69.90 You save: $40.94
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Primary Gear Thrust Washer 1275-1300cc .117" thick | Classic Mini
$69.90 Primary Gear Thrust Washer 1275-1300cc .117" thick | Classic Mini
Primary Gear Thrust Washer 1275-1300cc .119" thick | Classic Mini
$28.96 Primary Gear Thrust Washer 1275-1300cc .119" thick | Classic Mini

Standard gap size should be between 3-6 thou. See DAM6486, DAM6487, DAM6488, DAM6490, DAM6492 for alternatives. This type is for the 1275cc crankshaft only which has a raised step for the primary gear to sit on. Race applications can be increased plus 3 thou. Thrust washer 0.120-122”(3.04-3.09mm). The measurement is taken as plus or minus one to the size hence the two thousands tolerance on each part number.

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Related Technical Articles:
ENGINE TRANSPLANTS - Engine to gearbox fitment
Created: November 01, 2000
Assembling the engine to gearbox (transmission) is explained and simplified in this article. Contrary to popular mis-guidance, all BBUs will fit all four-syncro gearboxes. It was only the three-syncro boxes that varied in casting dimensions causing hassles where 1275s were applied to 850/998 gearbox casings. The longer throw and bigger crank and rod assembly dimensions fouled the sculpted areas in the gearbox case,