The Cal Rayburn Style KR tank
In the summer of 2012 Chris Rudy, AHRMA racer from California contacted me about making KR tanks. He said no company makes a KR tank with anti-ethanol properties. He knew that I offered tanks that are impervious to alcohol in gas. Chris had a KR tank that had been terminally consumed by ethanol and was no longer viable. It became the mule for this tank.
Chris had seen a KR tank on an early Mert Lawwill bike which was longer and more tapered in the rear than his stock KR tank. He said it was called the Cal Rayburn style so that's what I'm calling this tank. It is about 1 3/4" longer than his stubby bathtub tank. The longer tank is preferred by his fellow racers because it butts up to the seat without a gap.
About the time Chris and I were working out the KR details, Freddy Adams from Odessa called for a tank for his Sprint. I convinced Freddy that the Rayburn would be perfect for his bike too. He got one and now he has one pretty Sprint. So I can make this tank with mounts for both KR and the Sprint (without the upturned carb). This tank will fit 900 Sportsters too since its frame is very similar. Late in 2013 I learned this tank will not fit ridged Sprint frames. Make sure of my tanks specs before you order.
I recently found a supplier who can make my tanks for less. I knocked my margin down so the new price is $330 as of 10/20/2015.
- White Gelcoat $330 with petcocks, see option
- XR orange Gelcoat $365 with petcocks, see option
- Overall length – 19" (end to end)
- Length of channel – 18 ¼"
- Width – 10"
- Height – 6 ¼"
- Tunnel width – 2 1/8"
- Capacity – about a gallon
- Resin – Polyester with new anti-ethanol coating
-  ¼-20 steel threaded inserts for mounts
- Specify KR, rear location
- Specify Sprint, front location
-  1/4” petcocks with levers
- Brushed finish gas cap with internal vent
- Petcock option, no extra cost
-  Aluminum inserts for Pingle style petcocks (petcocks not included)
This is Chris Rudy's KR with my Rayburn tank. Chris is an active vintage racer on the West coast and has done a marvelous job restoring the bike with which to do combat. When I mentioned to Chris that '87' was Breslford's number I got this in reply:
"A lot of people think I run #87 on my vintage bikes because of Mark Breslford, but that is not the case. Here is the rest of the story.
"My dad raced for Tom Sifton in the late 1940's. His number was 66. His teammates Bob Chaves and Larry Headrick were numbers 20 and 87 respectively. Years later, when we were growing up, my brother and my cousin and I rode our bicycles around and played that we were racers. My older brother Gordon got first pick and he took my dad's number 66. My cousin Tim took 20 because his dad and Bob Chaves were best friends. I had third pick so I took 87, Headrick's number.
"From that time on we had 'our' numbers on our bikes. We all ended up racing when we got older and each of us was lucky enough to eventually be assigned 'our' number by the AMA. So I have officially been '87' since 1982. (Shown here is a photo of my dad and Headrick.)
"When I first saw Brelsford race as a kid I rooted for him because he was 87. Of course later he became a hero of mine because of his great talent. I am happy to have my bikes be a tribute to him as well. Not to brag on my dad too much, but here is a cool story about him."