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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
break-in help
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[QUOTE="wake_rider, post: 1409222, member: 75633"] You just need to heat cycle the new piston a few cycles while running rich premix ratio. -Run 16:1 premix -Run your bike 1/4 throttle until it's well warm (15 min or so) then shut it off. -Change oil. -Run your bike up to 1/2 throttle till warm (again 15 min) then shut off. -Change oil. -Run bike normally with incremental runs of full-throttle until hot (20 min or so), shut off. -Change oil -Now drain remaining 16:1 premix, mix premix to your normal mixture, put in fresh sparkplug, and enjoy your fresh top-end! BTW: While running through the heat-cycles, don't allow your bike to idle for any extended period of time. You're trying to saturate your piston rings with pre-mix oil and allowing them to seat into place while your piston goes through it's first expand/contract cycles by heating and cooling. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
break-in help
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