Big Bore & Performance Kits for your BMW R45, BMW R65 and R-boxer from Hornig

With the Big Bore and Performance Kits from Hornig you technically upgrade your classic boxer — ideal if you want increased torque, more power and improved riding characteristics.

 

Power Kit 860 cc – More power for small boxers

The Power Kit 860 cc is available for BMW R45 (from 9/1980), for the BMW R65 with 27 HP and the GS variant R65GS, and for BMW R65 (from 9/1980) with 45 HP, 48 HP or 50 HP.

When the kit is used, torque increases up to 75 Nm (on the R65 variant), giving the small boxer noticeably more pulling power.

As with all Hornig performance kits, the new Power Kits also use high-quality Nikasil cylinders and forged pistons — for durability and reliability.

 

Why a Big Bore / Power Kit from Hornig makes sense

The high-quality components — Nikasil cylinders and forged pistons — provide even torque and noticeably better throttle response, which is a major advantage especially for everyday rides or journeys with luggage or a passenger.

Thanks to the kit's plug-and-play principle, the conversion remains comparatively simple and workshop-friendly — ideal for ambitious home mechanics or experienced workshops.

 

Who is the Big Bore / Power Kit for?

The kit is aimed at owners of a BMW R45, BMW R65 or R65GS who want to extract more power and torque from their small boxer — for sportier riding, hill climbs, touring or simply more riding enjoyment.

Anyone looking for a balanced everyday engine with better throttle response and more pulling power in the mid to upper rev range will also benefit greatly from the kit.

 

Conclusion

With the Power Kit 860 cc from Hornig you transform your BMW R45, BMW R65 or R65GS into a stronger, more torquey boxer — without major compromises in reliability or everyday usability. More torque, greater performance reserves and noticeably more riding fun for your classic.