after you read everything under required reading then think about what you want to dump $180 on. I'd put it towards building a pipe and spend the other $160 on other stuff.
Joe. The tires http://www.partsforscooters.com/154-62_14_Tire?sc=2&category=326 I think I got both of them together for $35 including shipping. super cheap and they seem very beefy for a lot of years of use. I've been considering 16" rims for a long time and now more so. Apparently you can run bmx tires on 16" rims and my thought is since bmx tires are so thin they'll conform to the road surface for running around the go kart track. Probably not too safe for on the streets but 65mph downhill bicycles don't use special tires. idk.
that's before I drilled the holes through the pegs for a little extra zazz and grip.
The forks are from a 80cc or 125cc dirtbike idk. The main point here is that any fork you choose wont fit as the bearings and stem will be different. What I had to do was cut out the original stem from the 80cc forks and cut a stem out of a set of old qt forks. I then made it a press fit and just for a little extra travel because my front end sits so low(gonna change once I get my frame done up) I welded the qt stem into the bottom triple of the 80cc fork upside down. It helps to have a spare frame to build it up on before having to strip down the daily to put them on.
Oh and I shimmed the OD of the bearings so I could use the 80cc wheel bearings in the qt hub. I should of just measured and ordered some online but they're working fine so far. I need to have a spacer machined up to bolt the disc to but recently I've been elbow deep into building bikes for other people, I'll show you pictures of this ground up moby build I'm doing for a friend that gave me carte banche.
Here's something to get you excited about a velocity stack. Easily the biggest all over mph gain.