a 1981 model bored .60 over with a 36tooth rear sproket and 18in tiers will do approx 68 to 73 mph depending on the porting
my 1981 atc250r went 62 mph with a tired motor and got there faster than my 400ex
The top Speed of a Stock YFZ450 can be 92-93mph but if modified it can go up to 115 mph The top Speed of a Stock YFZ450x can be 95-97mph but if modified it can go up to 117 mph. The YZF450x is faster because it is lighter
The official top speed is 152 miles per hour but modified versions can exceed that.
The Honda CR 125 has a listed top speed of 45 miles per hour. The Honda fuel pump can be modified to increase the top speed.
Base, or ZR-1. Stock or modified?
The top speed of an unmodified 1998 Mitsubishi Eclipse is (125 mph) one hundred and twenty-five miles per hour. If the vehicle is modified for more performance, the top speed can vary.
Racing
34mm
For a stock one around 80-85 mph seems to be about the top speed. Modified engines can go much faster.
65mph stock on street. Mines nearly a factory bike so it tops out at 71mph. Stock about 58 on dirt. Same loss modified.
In a modified separating funnel the lighter liquid is extracted at the top of the funnel.
The 1994 Chevy s-10 ss is computer governed so it tops out at 94 m.p.h. unless the computer has been modified