Depending on year and condition, you can expect about 48 to 55 MPH on your Suzuki RM80.
I want to say i can reach maybe 230mph? though it might be limited to 180mph...
year 1989-1993 140mph 1994-2008 135mph
stock gearing around 72-75 mph
Stage III Trinity racing motor in my 92 LT 250r w/ FMF pipes, 100 LL fuel Pro-design head, and lots more ran a true 70mph. This machine was built for the woods and had plenty of extra weight in skid...