I'm new to dirt bikes, but rode sport bikes for about 12 years, and I'm curious about something...
Why do 4 stroke MX bikes need top ends/valves every couple of seasons when a CBR600RR can last much longer with a similar redline (15K), compression, etc? It seems (not that I know what I'm talking about) that a MX engine is just 1/4 of a sportbike engine. Am I way off - was I taking crappy care of my street bikes?
Why do 4 stroke MX bikes need top ends/valves every couple of seasons when a CBR600RR can last much longer with a similar redline (15K), compression, etc? It seems (not that I know what I'm talking about) that a MX engine is just 1/4 of a sportbike engine. Am I way off - was I taking crappy care of my street bikes?