It sounds like you might have some carb-related problems. A general tune-up and carb cleaning should do wonders.So, I can only get 85 mph out of my 1980 CX500. Any tips out there on how to get better performance out of her. I'm new at this stuff, so any help is much appreciated.
All the original test articles I've ever read have the top max speed at 100-105 mph, depending on the model and year.Could also be your cdi box. Had that happen on mine full throttle and she just wouldn't go faster than 80. Changed my cdi and then she would run up to 120.
The older speedos have the higher mph readings on them, my original 79's was one of those. I replaced it with an 85 mph one supposedly from an 81, maybe they switched in the 80's?What runs thru my mind when I read that is: How do you know you were going 120mph when our speedos only go up to 85mph ? Or did you have an aftermarket speedo on it ?
The speedo was broken when I got the bike. I swapped it for one off of a 1980 model. The tach was redlined plus some. My buddy bet I couldn't get the bike over to do over 100mph. I took him up on it and he paced me on his cbr600rr. Both of our speand what does the rev. counter show at 120.........