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JIMS billet gearbox case for 5-speed Big Twin
Category dedicated to gearbox casings manufactured from machined aluminium (billet) by JIMS, specifically designed for 5-speed Harley-Davidson Big Twin engines. These replacement parts substitute the original transmission cover, offering greater durability and a premium aesthetic finish.
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JIMSJIMS billet gearbox door for 5-speed Big Twin
Version: Plato soporte billet cromado Jims BT80-93Machined from a solid block of 7075-T651 aluminium, for use with engines producing over 100 bhp. The bearing…
About this category
Includes gearbox casings for Evolution, Twin Cam and Milwaukee Eight engine families, compatible with Dyna, Softail and Touring models. Manufactured from high-quality aluminium, they typically feature polished, anodised or powder-coated finishes. Essential for maintaining the integrity of the gearbox sump and enhancing the aesthetics of the primary and secondary drives on American custom motorcycles.