[TurboMonster]

I had a replacement tube made to loop around the open frame holes, like a bumper.

I drew up eight different design ideals...
http://www.turbomonster.com/johnson/TailChop/MonsterTailChops.pdf

Production Photos...
http://www.turbomonster.com/BillJohnson-MonsterProduction.tpl

 

[TurboMonster]

[clap] how is it held in place?

I put some silicone on the portion that inserts into the frame (to eliminate and vibration) and there are two small set-screws on the bottom (one on each side).

The plate holder is attached by the bolts behind the tail light.

 

[TurboMonster]

Can you do an exhaust that will run up under the seat?

The short answer is "Yes", but you have to made some other changes...

Like stiffen the rear suspension to the point the bike is close to a hard tail. The standard rear suspension gives enough wheel travel that it can crush the can's. Plus you have to figure out how to route the exhaust pipes without interfering with the rear suspension.

I'm sure there some bikes on the DML with it done.