Mini Bike Engine Swap – HRM Adjustable Motor Mount

mini bike engine swap

HRM Adjustable Motor Mount

The HRM Engine Mount Plate (formally known as PMR) was designed by us as an easy way to do a Mini Bike or Go kart engine install. This plate works great for doing a mini bike engine swaps on the Baja Doodle Bug, Dirt Bug, Racer Motovox, Monster Moto 80, Go Karts and Drift Trike projects and more. It lets you easily install a common 4-7 hp horizontal shaft engine in just about anything. We came up with this product design back in 2009 and it has been very popular.

This mount system lets you have left to right engine adjustment for precise sprocket alignment. Front to rear adjustments for chain tension can easily be done using one wrench to loosen the bottom nuts. This plate solves the problem of having to slot mounting holes in the exact location to achieve proper chain alignment.

 This HRM adjustable Mount system is designed for engines using an industry standard bolt hole spacing. Examples. Honda GX 120-200 series, Honda 6.5 Clones. HF Predator 212cc, Briggs, Tec’ , Subaru  and other brands in the 4-7hp HP range. For Mini Bike Drag Racers it has been proven capable of handling built engines producing 15-30hp. The HRM Adjustable Motor Mount plates come with full instruction sheets and tech support.

Our new Adjustable Motor Mount plates have the traditional aluminum finish and the HRM Logo on them.

Please Note. If you see this Adjustable Motor Mount design online being sold by another company. And it does not have the HRM logo. They have simply ordered one of our mount systems and directly copied it. Rather than taking the time themselves to do any product design or R&D work  Please support original designers and manufacturers.

Thank you for your support! And to all our good customers who have purchased this mount from us!

Brad and Shaun @

Instructions for installation HRM motor mount instruction sheet




mini bike engine swap



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