In hydrolics very small changes in size have a big effect. Most digital micrometers will have trouble reading 1/2 thousands of an inch. The FC oil lock collars are only about .0005 inch bigger than stock. This is all it takes to get an increase in bottoming resistance.
Factory Connection Oil Lock Collar Set
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When measured with a digital micrometer they are identical to the stockers. They are also the same design as the stockers. A total waste of 50 bucks!
looks identical to the stock set up. Don't know that is a necessary purchase.
By my 2006 crf250r and my friends 2005 cfg450r had the exact same oil lockers installed from the factory. Only difference was the color.
the FC oil lockers work great for when you over jump or under jump or when you hit a big g-out.