13/44 combination gear speed

[skykevin77]

I noticed my top gear speed (GPS) is like below
1st: 15 mph
2nd: 25 mph
3rd: 35 mph
4th: 40 mph
5th: 45 mph
6th: 74 mph so far

Does one mind to put in your observation?
Feels like 4th gear is a little bit small

[willy dog]

my bike never sees 6 th. gear but it reads about 50 at 7000 rpms and around 55 at 7500 that's with speedo dv gismo set for my kenda's and 13/44 checked with police radar