This can be very
dangerous as it reduces the trail and can quickly lead to a negative
trail situation. The pictures at left show the rake and trail relationship
in a standard-type bike (pic 1), a seriously raked chopper (pic 2), and a chopper with rake
corrected in the triple-tree offsets (pic 3) and another corrected by adding
some forward distance in the front wheel attachment point (pic 4, like that used
in a springer front end).
If you feel you have an over long trail, you might
consider making some homemade offset trees for your mini chopper. To do this,
you can try notching the rear of the holes on the top of your tree and notching
the front of the holes on the bottom. Then you can offset your fork tubes a
couple of degrees.
You can also try adding a piece that moves your front wheel
forward slightly, as in the last picture. This is similar to what you can expect
when using a springer front end. Check this page to see how a springer
Getting the trail correct may take some trial-and-error, but the
better control you will have will be worth the effort.
This info should help you better understand
these important principles. There are also links at the bottom to other sites
that can offer much more information, such as how to measure your trail, how to calculate
your trail, and other important stuff.
Just Remember - Keep it Safe!