REMARKS :
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- bearing diameters: 42.42 - 41.82 - 41.23 - 40.62 - 36.92mm (small bearings)
- 8mm valves
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ONLY for dirt track applications and pro street use with adjustable engine management or carburettors
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Distance between valve and piston should be 1.0mm at least:
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check 5-15° after TDC on intake
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check 5-15° before TDC on exhaust
Machine pistons if required. Wrong installation can cause severe engine damage!