Either gas/oil ratio is off or the jetting needs to be changed.
a 1995 rm250 more power
10th digit is a "2", therefore your RM250 is a 2002.
51hp
The RM250 engine with the code J110-109405 is from the year 1990. Suzuki used the J110 engine designation for their RM250 model during that production year. If you need further specifics about the bike or its features, feel free to ask!
no
your motor is a 1989 suzuki rm250 the 1988 rm250 motor started with j106 the 1989 rmX250 motor # started with j111
Around 80 mph.
each leg takes 10.1oz
32:1
No
30:1 is recommended in the manual.
stock gearing around 72-75 mph