I'm going to install a GRUBEE SkyHawk GT5 66cc/80cc Bicycle Engine Kit (Black Finish) on a mongoose xr = no room. They are only installable on v shaped frames. But what I was thinking about doing is removing the shock (just for show on most bikes) then lowering the back tire by so much to allow the motor to fit inside and tighten the bolts up again. How will this ride will i be more vulnerable to crashing with the back tire lower than the front?