Harley-Davidson KR Racing Tank

The Cal Rayburn Style KR tank

KR-001Notice longer tapered lookIn 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.

Two optional ¼" petcocks with levers $25 more

Tank in white with coating $330
Tank in XR orange with coating $365

KR-005Chris 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.

kr tank bike 1 thAbout 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.

KR-002 KR-003The specs on the new Cal Rayburn KR tank are:

  • 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
  • [2] ¼-20 steel threaded inserts for mounts
    • Specify KR, rear location
    • Specify Sprint, front location
  • [2] 1/4” petcocks with levers
  • Brushed finish gas cap with internal vent
  • Petcock option, no extra cost
  • [2] Aluminum inserts for Pingle style petcocks (petcocks not included)

rudy-krThis 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.

HeadrickRudyLarry Headrick and Tom Sifton, circa late 1940's "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.

chris rudy trackChris Rudy on a KR at speed at Sacramento"""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."

  • [Site updated December 6]

KR Tank Downloads

SXR_manual_thumbKR Tank Assembly Manual
4-page how-to guide

Customer Feedback

This is good work. Thank you very much. It is not [a problem] to wait when the result is perfect.

Geraud Gorgas
Aurillac, France

Fiberglass Warning

More than a few parts I offer do not met DOT or SAE guidelines for safety. This is especially true of my fiberglass gas tanks. Metal tanks crush upon impact. Fiberglass can break and leak upon impact. This of course is a source of fire and a danger to you and others.

By purchasing any of my tanks (and other non-compliant DOT and SAE parts) you are assuming the risks of danger, injury and death. If you will not accept the risks, don’t purchase my products or return them unaltered for a refund.