Webra Bulley built by 3W. Ihave one on glow that will turn a Zinger 18/10 at 9000 rpm.
this is with tuned muffler system. I have seen it turn 9800 but is where they come
apart. Ihave been told that a bolley 18/10 will improve the preformace of this engine.
have not bought one yet they cost about $48.00