Lowering is easy
Std bike - manual suspension
Method 1
Wind the rear adjustor right out - lets the bike sit lower
Method 2
Get a factory low seat gives another 20- 30 mm reduction
Method 3
Lowered shocks, they come up one here, around £300 a pair Wilburs are one make, but there stock setting is very hard, i needed a very soft setting
Method 4
Remove your original shocks and sent them to Denzo, he can rebuild & lower the units to you and get the correct spring rate
Finally, you will need to lower your centre stand 30mm, and your side stand will need cutting to accomodate a reduction of 30 mm