Power Kit 860cc for R45/R65 (27HP) models from 09/1980

Now with 4 pc. stainless steel pushrod tubes!

This kit is for R45 and R65 models with 27HP and valve sizes 34/32mm.

Small Boxer, Big Fun: Siebenrock releases Power Kits for R45 and R65
Pure joy of riding on a R45 or R65?

Those who shake their heads in disbelieve should better take a look at the freshly developed Siebenrock Power Kits.
With a fabulous 860 ccm the „Small“ become true cornering monsters.
The numbers convince even the most tenacious of skeptics:
The R65 boasts some 20 % more power and a maximum torque of 75 Nm at 4200 rpm.
Even more drastic is the gain on the R45:
it already reaches its maximum torque of 70 Nm at 2150 rpm and with 30 % more power it puts a big smile on the faces of even the toughest riders of „big“ motorcycles.
Like all performance kits from the skunkworks of Siebenrock the new Power Kits possess the true and tested, near wear resistent hard chrome liners (Nikasil) and high quality forged pistons.

As the legendary power kit is the 860cc power kit for the small BMW models a real performance gain.
However, the power of 27hp rises to 36 hp and torque of 32Nm at 5000 U/min at 2150 U has 70Nm/min. In conjunction with the 308° camshaft 114036 the power rises to 48hp and a ratio of 9.5:1.