Never formed any complex shaped parts but I have several years of experience with carbon fiber.
I have made composite tubing for supersonic high stress flight and flat stock for similar purposes, dont ask

... long story.
Anyways.
For a motorcycle any laminating resin will work, I use aeropoxy because its very strong stuff but I need it for my purposes. Any laminating resin will be strong enough for a motorcycle non-stress part, you wont be able to break it. Look into West Systems, Aeropoxy, there was another company I used once I liked, US composites I believe?
Anyways you want a laminating resin (I know I said it three times but its important) because anything else wont soak in well enough, you need to be sure it has a decently long curing time (more then an hour or two) as you need time to work with it and if its to short it will thicken up quickly, especially if you make a large batch.
Use something epoxy based, not polyester like bondo.
Mixing is very important, make sure the ratio is close for hardner and resin is pretty accurate and mix for a couple of minutes vigorously, I have found mixing on a flat surface to be ineffective, I mix in a drinking cup (disposible of course) and it works well.
There are all kinds of weaves, they all have different looks but just be sure and get something bi-directional (lots of unidirectional stuff out there these days that obviously wont work and looks horrible), twill weave is interesting, I always stuck with high quality plain weave myself.
On a side note, another thing to look into if you want something really unique is a hybrid cloth.
http://compositeenvisions.com/images/pink carbon fiber fiberglass hybrid.jpg
Half carbon, half fiberglass or kevlar. I'd do glass, easier to cut. Usually you can get the glass colored, very cool look.
Where was I... Do some research on the CF, I have had some stuff that worked fine but it was thick feeling and would be harder to work with on complex shapes. I have also had some rolls that were like soft velvet or silk, could be molded into any form I wanted.
Now for the actual application. If you are adding to a previous layer, make sure that layer is roughed up for good bonding. Apply the mixed epoxy/resin with a brush very lightly, you just want a layer to help the cloth bonb but if its to thick it will float and not bond to the lower layer. Apply the dry cloth and work it in so the thin layer tacks it in place. Now start working with a brush or roller to get the epoxy to soak into the carbon. This is a key point here which makes CF harder then fiber glass. It doesnt change colors when its saturated. Dont over do it, but make sure you work it in there good to fully saturate the cloth.
Add layers as you go, repeating the process.
When it comes to the last layer, have a bit of extra epoxy but not to much, so you have something to sand into for the final finish. If using a vacumm bag you will need to cover in peel ply, or teflon coated products (have found some teflon coated nylon or similar porous release products to work better then peel ply but they all work) and then some thick breather material. Then bag!
I always liked to use mylar, anywhere from .005-.014 (.005 or smaller risks folds and creases) as it basically made the product ready to use, smooth and shiny, but it doesnt work with bags really and only works on my flat and round surfaces I made carbon on.
Other then that a few things to keep in mind, some epoxies, especially if its not especially hot out, take more then a week to fully cure. I have had some tubing made where after 12 hours it was dry to the touch, after 2-3 days I could flex it significantly but after a week I could stand on it and bounce without any sensation of flex. I now use a curing oven which makes it perfect and ready to go from the start but just be ready to set them in a warm atmosphere for a while before sanding and doing other finishing work... Good mixing will also insure that it dries on time without leaving wet spots that never fully cure without excess heat.
Thats about all I could come up with and I think I got enough there for you

. Well now that I am awake from typing this novel I think Ill go do a ride

...
Let me know what else I can do for you!