Al Magaloff rrMaster Location: 12,199 Posts- Enough Time Wasted. See Ya!
| The 603 and 643/644 share many of the same parts. Same throttle bore. I like the 603's choke set-up. The standard Hanson velocity stack won't fit. I'm ordering the Vario air filter today. Good choice on the fuel Stet, you'll love it!  |