The cheapest lowering for an ’05 or ’06 would be having the seat reshaped about 3/4 inch lower and a bit narrower. Much lower than that doesn’t leave enough foam cushion between your arse and the seat pan.
You can also drop the triple tree about a half inch down on the forks; any more than that might require shortening the side stand.
If that isn’t low enough (and you are not in a hurry) mod the suspension….
I believe lowering the ’04 and earlier Tigers only required rotating some bit on the swing arm. And lowering the ’07 and on, simply takes replacing a link in the rear suspension. But ’05 and ’06 requires changing the rear shock unit.
To get my ’06 low enough, I had Hagon make a custom shock (waiting time was about 10 weeks), which lowered the back a little over 1.5 inches. Then I dropped the triple tree down about 1 inch. And that required having the side stand shortened a bit.
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