http://www.totallyamaha.com
Great overall Yamaha snowmobile website.
http://srv540.proboards.com
Forum dedicated to the fan cooled 540 counterpart.
http://www.excitersx.com
A newly started website with a bright future dedicated to the Exciter SX.
http://www.vmax4.com
This website is devoted to the 4 cylinder brothers of the 540, the Vmax 4 750 (from 93-95) and the Vmax 4 800 (from 96-98)
http://www.vintagesleds.com
A ton of info on all makes and models of vintage snowmobiles.
http://www.auberins.com
The best bang for your buck in the line of EGT's that i have found.
http://www.bergstromskegs.com/
This guy can really hook up with high quality parts and a lot more R&D than you thought went into the skegs!
Classifieds/ Swap meet
http://www.snowmobileswapmeet.com/swapmeet.php
http://www.sledswap.com/class/index.php
http://www.sledfinds.com/yamaha-sx-srx-vmax-for-sale
http://www.vintagesleds.com/classifieds/
Parts Catalogs
http://www.yamaha-motor.com/sport/myyamaha/prompt/L3Nwb3J0L3BhcnRzL2hvbWUuYXNweA==/Parts%20Catalog/starthere.aspx
http://www.kimpex.com/catalogues.aspx?catID=1
http://www.jrgraham.com:9081/browse.do?action=expand_category&exp_ctg_id=7107309
http://www.shadetreepowersports.com/cgi-bin/D3626D08/mac/template.mac/loadHtmlPage?htmlPage=snow/index.html
http://www.denniskirk.com/jsp/product_catalog/cat_default.jsp?store=Main&catId=3&SR=&_requestid=358738
http://www.themotosource.com/index.htm
http://www.portyamaha.com/catalog.asp
http://pioneerperformance.net/
http://www.zanottimotor.com/snow.htm
Other Cool Websites
http://www.bluetraxx.com
Great all around Yamaha ATV website but beware of bad advice.
http://www.yfm350.com
AWESOME site for 350 Warriors, and other 350 Yamaha ATVs.
http://www.4cyclecentral.com
Bob Vehring's website on his 120's and gokarting. Thanks for the all input in the last few months Bob!