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If you are looking for a standard roller mini bike #25 chain with solid rollers, check quality stock at OMB Warehouse. Be assured of the highest ANSI standards. #25 roller chain is a 1/4" pitch ANSI Standard roller chain designed for light-duty or space confined applications. It's the smallest size roller chain on the ANSI spectrum of roller chains but offers ample performance, strength, and durability for its small form factor. We supply 25 roller chains in a range of stock lengths. right off the shelf! At OMB Warehouse, we have the broadest selection of #25 chains on the market, from your standard carbon steel materials to stainless steel. Notably, mini bike #25 chain does not contain rollers, rather just bushings that come into contact with the sprocket. Check out our mini bike #25 chain for a 6.35mm pitch sprocket. The #25 or #25H Chain Length is 17.8 inch (Full Length: 35.6 inch) Pitch: for 6.35mm, Pitch Sprockets Link: 141 Links. These chains are compatible with MY1016 250W Non-Geared Motor and MY1016 350W Non-Geared Motor. Heavy-duty #25 chain is often marked "H25" and is suitable for all dirt bikes, mini pocket bikes, and small electric go-karts. The standard-duty #25 chain is suitable for small and lightweight mini bikes.