Well I found out something interesting!
Did you know there are FREE GPS Speedometer downloads
avalable if you have a "smart phone" ? ! !
I have had my phone all of about 2 weeks now ( yeah, i was slow to
ge trid of my trusty reliable old dumb phone )
I downloaded 3 different GPS Speeometer apps yesterday and when I
got home, knowing I had to make a run to Lowe's and knowing my Jeep truck speedometer is 100% spot on, I opened the app and away I went. Checking all 3 GPS spedo apps and verified all 3 were correct.
Later on I had to go about 2 miles down the road for milk and TP and
drove my wifes Volvo XC90. It too was bang on the money.
Remember back ---in one post or another-- where I mentioned I thought
my speedometer was off by 10MPH on the CRF230L ???
NOPE! We were
allll speeding!!! 
The CRF230 is only off by 1 MPH at 60MPH indicated. At 30MPH is showing dead on best I could tell.
.
.
in other news: I removed that stupid red strap going across
the seat. It was in the exact spot my butt likes to sit and was a
bit bothersome after a few min. Wow. 100% improvement!
This seat is actually comfortable now! Was not bad to start with,
but now is near perfect.