What happened to the 91 hr cmb motor

[Tofastformellow]

Just noticed around the world the cmb hr90 is dead , and reason why ? Removed everywhere

 

[David Ashcroft]

As is the Vac91 .

Not sure mate maybe novarossi are knocking them off the shelf with their new engine line.

 

[Wally Marsh]

There was a similar post recently, Stu's reply was built primarily for North America, not enough sales to justify continuation, the 91 evo should be a great equivalent just a little harder to work on

 

[dwilfong]

The HR and the VAC .91 eng where a good out of the box eng.

The only down side was the need for bearing replacement as thy would be short lived.

The newest .91 EVO looks to be a good eng. Have two apart right now prepping for a buddy's twin........

Thy look like thy will perform good with a reasonable amount of nitro with just a clean up and disk clearance.

The internal castings changes look good and the new style front bearing with the snap ring and spacer should work nice on a cable drive setup.

The piston casting look very good also..........................

 

[Andrew Coppolino]

Only ever run 91 evo they are a great engine, perform well with 50% imo

Andrew