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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Where to get a crank stroked?
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[QUOTE="cluckenbill, post: 1164221, member: 75932"] I work for a company called Vertucci Performance Equipment. We do a lot of Stroker cranks for mostly all two-strokes from 65's to 500's. If you have no previous experience in building strokers I would not attempt it. Some of the best machinists can screw up a crank in no time. Every aspect of flatness, truness, and squareness must be checked and rechecked. You also need to use different tooling to cut a crank. Plus you must know the required press fits because they are different than stock. As for machining the cases, you must know your new rod spec because too little will require rod modification and too much will open the crank case volume too much which will result in loss of power. Depending on the added stroke the rod might have to be modified which should not be ground! We machine the rods precisley to what clearance we need. I've never had a rod break in one of our motors. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Where to get a crank stroked?
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