that would be the rincon 650cc
the fastest stock 450 ATV is the ds 450 by can-am.
The official Honda website would have Honda ATV parts for sale or would at least have a list of dealerships that are in your area that sell Honda ATV parts.
The fastest stock, production atv is either the Yamaha 350 Banshee or the Suzuki Quadzilla but this is highly debated. Modified or custom atv's can go faster.
They make between $50,000 and $60,000.
You should post on a ATV forum. See related links for a Honda ATV forum. They will try to help you out.
A Honda
how do i check the timing on my 02 honda 350 atv
Raptor700
The Honda TRX450R ATV can be purchased online through a large selection of different websites. Some of the these websites include ATV Honda, ATV Trader, Quad Hunter, Cycle Trader and eBay.
Honda
the fastest racing ATV is the Polaris Outlaw 525, It goes 50 MPH. , SORRY. THE YAMAHA 700 RAPTOR IS THE FASTEST ATV OUT IVE RIDDEN BOTH AND THE RAPTOR IS FASTER new answer:i think the fastest three wheeler is the Yamaha z 250 im not sure what the top speed is but its the fastest thing ive ever drove
You can purchase accessories for your Honda atv right where you purchased the atv from. Or you can go on line to eBay, or amazon, or cheaperthandirt.com,or campingatv.com. There are many places to purchase these items from.