I am a short person and i can't completly put my foots on the ground so i lower the front of the bike but still need to lower the rear too and there isn't any aftermarket lowering bones to do it.

So, anyone knows how to lower the rear height of this bikes?

I was thinking in burn the shock spring

 

i wouldn't do that..it could potentialy ruin the handling geometery of the bike. Just tip toe at a stop or lean to one side. or give me your bike and buy a pocket bike LOL.

 

LOL actually like your poket bike joke...


But i need a better option. There's any mod i can do to the shock or something?

 

i have not read of a single thing to do to lower the rear of an f1...man maybe invest in shoe lifts or something..LOL..i got nothing...

 

You will need to get a shorter shock, I need to drop my CBR600F1 an inch for the wife. They don't make adjustable dog bones because the cushion arm will hit the swing-arm pivot. I am trying to find a shock to do this as well. need one from a similar bike with VERY similar cushion arm but only 11" center to center no the shock mounts. I'll update if and when I find it.

 

The shock was in position 7 so what i do was set the shock to position number 3, that really helps, now i feel a more comfortable on the bike but feels a little loose

 

Have you considered cutting the foam in the seat down? I don't think softening the rear suspension will not have the effect you are looking for especially if the rear shock is original. The rear of the bike too soft makes these handle like a truck, bottoming on bumps and wallowing under power. Dropping the front end reduces cornering clearance and increases turning effort.
My wife is 5'4 and we went through all this while she learned to ride. After restoring the bike to its normal configuration she found it a much more confidence inspiring ride. She gained confidence and learned to pay attention to where she was stopping...avoid the gravel, holes, uneven ground, and other hazards.
Yes the bike did fall over a couple times in her care but neither was ever significantly damaged.