The BUB Seven search of the "salt-gasm"

Denis Manning’s motorcycles have been chasing world land speed records for over three decades and now the BUB 7 Streamliner he designed and built is the fastest motorcycle on the planet. Chris Carr set a new FIM world record & AMA national record at 367.382 mph thru the mile with an exit speed of 372.534 mph at the Cook Private Meet at the Bonneville Salt Flats Utah.

We got a chance to not only look over the car at the V Twin expo and talk to the BUB team, but the Biltwell/Lowbrow Customs booth was set up directly across from their display.....which meant I just drooled all weekend over this....
The Engine: The BUB Seven is powered by a custom V-4 engine. This engine is purpose built for motorcycle land speed racing. From a blank sheet of paper this engine was designed for one thing, power the world's fastest motorcycle. The maximum limit for this land speed racing is 3000cc. The engine also needs to fit in a space 18 inch x 28 inched so part of the initial design is to fit this compact space. The V-4 concept was used for two reasons, one to fit into the packaging and two the unique surface of the salt flats requires a engine with traction control. The engine is a big bang type so that the engine can gain traction then relax and then transfer power with the next power pulse.
Unlike drag racing one of the challenges in LSR racing is that the motorcycle has to make two runs; a down and return that make the average for the record, so the engine has to survive for both runs without any modifications.


3 Liter, Turbocharged, Liquid Cooled, 16 Valves , DOHC, 90deg, V-4
Bore x Stoke : 4.125 in x 3 in
Compression ratio : 9.5 : 1
Transmission : Computer Controlled Air Shift 4 Speed
Clutch : Indy Car Dry Clutch
HP/Torque : 500hp @ 8500 RPM, 400 lb/ft torque @ 8500 RPM
Power Command :MoTeC
Fuel :

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Commented on 2-14-2010 At 05:13 am

Pinnacle of its time! Great reading as well, thanks for sharing mate!

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Steve Pfalzgraf

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The So-Cal Cycle Swap is going down this Sunday at the Long Beach Veterans Stadium. Day of vending is available.
The Greasiest Motorcycle Show at the B-House Live. Indoor Custom Motorcycle show. 30+ custom motorcycles, bands, and vendors. Ten dollars at the door. Kids 12 and under Free. 21 and over only after 4 pm. For more info check out their website and give them a follow on Instagram and Facebook.

Have a great weekend!

Photo by Alec Ozawa.

Take a peek at Basket Case Issue Seven

Our friends at Basket Case give our readers a sneak peek at Issue 7 which is available now! Check it out here.

16 Tooth Transmission Sprocket

I'm runnin' this 16T on my K flat-tracker for a bit . . . down from the 18T

Gary Scott

Ironic photo, since it appears he riding a Triumph ! ?
Scott was an AMA Grand National Champion in 1974.  He raced Triumphs, then raced for Harley-Davidson factory team, then as a privateer.  Gary Scott was an excellent professional motorcycle racer, but sometimes he could be a real asshole.  I guess he slugged Bill Werner in the mouth once over something?  Maybe he deserved it?  Scott claimed a few motors, said a lot of words . . . but hey, gotta like the dude 'cause he goes like hell ! 

TECH: Piston Skirt Slot ( WL Pistons )

There's "Nice to Know" and there's "Need to Know"
I'm not sure which may apply to you ?
This angled slot is factory on all oversize WL (45") pistons. 
Standard bore (2.745 std. size) pistons do not have this slot. 
The slot is only on oversize pistons
This piston (pictured) is +.040 oversize.
The slot is only on one side of the piston - Not both sides. 
Slot position is towards the front of engine(opposite thrust face)
The thrust face of a piston is on backside of each cylinder.
Correct installation = slot towards front-side of cylinder.

May 15th, 1921

Harold broke Cannonball Baker's 24hr record . . . then ended up being killed while testing when a horse stepped out in front of him.  Many top racers die in testing accidents. 
Today is his birthday.

Bultaco !

Z O O M    I N  !
The bulls have a good power to weight ratio . . .

Dig Out !

Who writes this stuff . .  ?
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