Ok, so if u want ur bike go fast, Then Copy Paste This line to your handling.cfg Wich is located from C:\Program Files\Rockstar Games\GTA San Andreas\data

So Here is the line: FCR900        500.0     200.0   4.0    0.0 0.07 -0.09 103 1.80 0.98 0.48 	5 320.0 150.0 110.0 R P 16.0  0.50 0 35.0  	0.85 0.15  0.0   0.15 -0.16 0.5  0.0		0.0  0.11 10000 	1000000		0			1  1	4