Perform to perfection with our top-notch professional:
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Crank Work
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Engine vibration costs you power and money...Make it right with expert crank balancing, and save on both.
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Crank Work
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Don't mess with the rest - Use the now recognized best...
Dead True! No Hammers! STR has developed a system to assemble single cylinder cranks the way the factories build theirs. Rebuilt with a max runout of .001. We stock and use ProX Genuine Racing Parts for YZ's, KX's and RM's from '90 to 2011.
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Crank Work
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STR offers stroker cranks made to your specs...
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Performance Engines
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We're your one-stop-shop for 85cc Long Rods, Super Minis and Super Mini Supremes. No need to buy new cranks and cylinder cores - we can rebuild them for you, saving you money. And, we always give you your parts back so you know what was wrong and can be sure of what was replaced.
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Clutch Mods
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Clutch Problems??? Broken Plates??? We can fix 'em, and help you prevent problems in the future, too.
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Performance Engines
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Tired of paying $2000 and ↑ every time you blow up your 250F. Tired of participating in the P.C.P.? That's the "parts counter program" that the factories have created with the four stroke revolution. They try to convince you that you can't compete on a two stroke. We disagree!!! The transition from an 85 or 105 to a 250F is too great. If you want to polish your skills for the future, we recommend staying on a 125 or better yet a 144/153.
Here's what our 144 / 153 Kits can do for you...
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