River City Beemers

Big K Tank

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K1100 Custom Tank Expansion
If you want to expand your horizons with your existing K11 or K100 RS/LT then a tank expansion may be your ticket. Ray Randolph from Lubbock, TX will expand your tank to 8 gallons for the sum of $450 plus shipping and turn around time is about three weeks.

I bought a used tank through Cycle Specialties in Modesto, CA for $178 including sales tax and then C.S. shipped the tank for me to Ray. When I received the tank from Ray, Cycle Specialties recommended a guy to paint the tank. I got an estimate from him and for $500 he will bondo, and paint the new tank. Now I have a 280-320 mile range that is more adapted to my biological schedule and will make me more competitive in 24 hour endurance events without giving up my rear top box because a fuel cell is on the rear rack instead.

r-07.jpg (32782 bytes)Your total costs can vary depending on if you use your existing tank and your painting skills are good or if you use a different shop to paint it for you. You could also have a custom tank cover made and just leave the tank bare with all the welds and seams exposed underneath. I bought a used tank because when I eventually sell my K11LT I will reinstall the OEM tank and then sell separately the expanded tank to some other endurance wacko.

Ray’s address is:

   Ray Randolph
   2010 Jason Ave.
   Lubbock, TX 79407-3006
   806-785-1522

 Give Ray a call and turn your K bike into a ST1100 beater in every way!

 

When your tank is finished and ready for installation you will then install your fuel pump and gas sensor with a new 0-ring. Now that the tank is completely dry, you now have the opportunity to see exactly what each mark on the gas gauge really means. Start filling up the tank one quart at a time until your reserve light goes out. Now you know exactly how much gas you have left when the light comes on. The bike should be on the side stand and then move the bike upright and look at the gas gauge. On my bike for example, when the warning light comes on I have exactly 1.25 gallons in the tank. When the gauge needle is on the first red zone mark I have 1.5 gallons of gas left. Once you know how much gas you have when the reserve light comes on you can now put the bike on the center stand and start filling away until you reach the top. Now you know how much your tank holds.

R-08.jpg (32892 bytes)If you have a fuel+ meter then you will need to manually calculate your new gas tank. The manual tells you how. I filled my tank to the top and then removed one quart and I was ready for my calibration ride. I rode until I ran out of gas so I could have the computer mark the numbers. Once it’s done and you use your calculator to figure out the new hi and low numbers and enter them in the fuel+ computer it will be automatic from then on. Just write down the numbers so you don’t have to spend another five hours doing the manual calculation if your power is disconnected for some repair or service for a long period of time. If you want to save yourself five hours of riding here are my fuel+ numbers that you will program into the computer. Hi: 51, Low 203. I just saved you a bunch of work, so the next time you see me you can hand me a nice super cold Dr. Pepper!

Enjoy the photos and if you see me at a meeting or outing ask me anything about it. If you like it tell me so and if you don’t, cross your fingers in front of my face and tell me how much you ‘love’ the new tank!

Kim Rydalch
Modesto, CA

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 Webmaster note:   Kim's bike and the new tank is as fine a K1100 finished product as one can imagine.   The fit and finish and shaping of the tank is PERFECT!   This is the tank BMW should've built to begin with.