Hi Milton, the reeds are the same configuration as the others but the reeds are carbon fiber, not fiberglass. The carbon fiber has a quicker response time which improves performance. The spark plug is Iridium center electrode which improves the spark. Pterodactyl was the first engine to use these plugs. Now Rcexel has their own type of Iridium plug, from a different manufacturer. The Pterodactyl Iridium plug has a brass top where it contacts the H/T wire whereas the Rcexel uses steel which does not conduct as well as brass. The crank end is still parallel the same as the rest. Their machining tolerances are an improvement over some of the other
Chinese engines. They are also working on a 35cc which will be rear carb and rear exhaust. We have been working with the Pterodactyl factory on it's design and it should be a winner.