Reply to thread

Message: [QUOTE="crawl9, post: 558607, member: 38739"] Hey motometa, So your Saying if You stroke a motor Say with a 54mm bore and a 54.5 stroke and make it a 54mm bore with a 64.5 stroke. That Your Ports will Have to Be Smaller on the 64.5 stoked motor than the 54.5 Stroke motor? Also, What's Rod to Stroke ratio and how does it affect the engine? Also, Does anyone Know what the Safe Limit Piston Speed is on a modern bike Is? Also, Does anyone know how to figure out The Blow down duration of a engine at a certain RPM? [/QUOTE]