radical

Totally Sick! RZ500/R6 Hybrid. Too good not to share. Cross-post From The 2-Stroke Board.

You hear about bikes like this in lots of conversations…. “wouldn’t it be cool to put engine X in chassis Y”..  Well someone REALLY did it.  More on the project over on BARF

“Current generation Yamaha R6 chassis with Ohlins forks and shock, Brembo brakes, forged wheels, and aluminum subframe. Engine swap with Yamaha RD500 (aka RZ500 aka RZv500) V4 twin-crank two-stroke. Handmade expansion chambers with carbon fiber silencers. Mikuni flatslide carbs.”

Another Briggs and Stratton Bobber from… Bob.

The build sheet:

Specifications For Black Briggs Bobber
Frame—————————Probably nos aftermarket hardtail from the 60s
Wheelbase———————58 in.
Rims—————————–18 x 2.15
Tires—————————–18 x 4
Hubs—————————–Honda 350
Brakes————————–Drum
Swept Area——————–56.5 sq. in.
Brakes Loaded—————-8.8 lbs. per sq. in.
Curb Weight——————-300 lbs. / 200 lb. rider – 500lbs.
Fork—————————–Homemade
Rake—————————-25 degrees
Trail—————————–3 in.
Suspension——————–Leaf spring over leading rocker
Floorboards——————-24 in. Wide and 8 in. clearance
Lean—————————-35 degrees
Ground Clearance———–6 in.
Axle to Ground—————13 in.
Crankshaft to Ground——-11.75 in.
Handlebars——————–Lowrise buckhorns 31 in. wide with 5 in. rise on 3.5 in. dogbone risers
Grips—————————Anderson style
Engine————————-V twin ohv Briggs and Stratton
Displacement—————–34.75 cu. in. / 570 cu. cent.
Bore—————————-2.83
Stroke————————–2.76
HP——————————18 @ 3600 rpm
Torque————————-30 ft. lbs. @ 2400 rpm
Exhaust————————two into one header 1.75 in. auto
Drive Train——————–comet ind torque converter
Drive Clutch——————-44 c magnum
TQ Overall Ratio————-2.43 to 1
Final Drive———————428 chain sprockets/ 15t into 60t for 4 to 1 ratio
Speed————————–70 mph @ 3600 rpm
Frame Geometry————-Cloned from Indian 101 Scout
Steering Geometry———–Cloned from Indian 101 Scout

Update: Worlds Fastest Briggs and Stratton Custom Motorcycle! Seriously.

Updated with more pics!  Thanks again Bob!  And once again Nice Job!  I REALLY like these sorts of builds.  Very Creative.

Bob Decker sent in some pics and links to this really cool custom Briggs and Stratton powered custom but this is the only one I could get to that was big enought to use. I’ll update the post if Bob can get me some more. I love this concept. I’ve looked at the big Briggs engines and before and thought that they were plenty powerful enough for a motorcycle. 35 HP and 52 ft lb of torque ain’t bad!  Guess I was right! Thanks Bob!

Here Is the Build Sheet he sent me with it:

Frame——————————————————————Homemade designed from scratch

Wheelbase————————————————————-59.5 in.

Rims——————————————————————–18 x 2.15

Tires——————————————————————–18 x 4.5

Hubs——————————————————————-Honda 350

Brakes—————————————————————–Drum

Swept Area———————————————————–56.5 sq. in.

Brakes Loaded——————————————————-10 lb. per sq. in.

Curb Weight———————————————————-368 lb./200 lb. rider – 568 lb.

Weight Distribution—————————————————Front – 169 lb. / 46%

Raer – 199 lb. / 54%

Fork——————————————————————-Homemade

Rake——————————————————————-26 degrees

Trail——————————————————————-33.3 in.

Suspension———————————————————–Leaf spring over leading rocker

Front rocker lift ratio————————————————2.6

Floorboards———————————————————-24 in. wide and 8 in. clearance

Lean——————————————————————-35 degrees

Ground clearance—————————————————-5 in

Axle to ground——————————————————-13.5 in.

Crankshaft to ground———————————————–11.125 in.

Handlebars———————————————————–Lowrise buckhorns 31 in. wide with 5 in. rise on 3.5 in. dogbone risers

Grips——————————————————————Ivory from a dead woolly mammoth

Engine—————————————————————-V twin ohv Briggs and Stratton

Commencer———————————————————–Electric

Displacement———————————————————-60.6 cu. in. / 993 cu. cm.

Bore——————————————————————-3.36

Stroke—————————————————————-3.42

HP———————————————————————35@3600rpm

Torque—————————————————————-52.2 ft. lb. @2400 rpm

Exhaust—————————————————————Dual

Drive Train————————————————————Comet torque converter

Driver Clutch———————————————————-94c duster

Overdrive————————————————————–128%

TQ Overall ratio——————————————————-3.49 to 1

Highest gear———————————————————–2.8 to 1

Low gear—————————————————————9.8 to 1

Final drive————————————————————–50 pitch sprockets / 15t into 54t for 3.6 to 1 ratio

Speed——————————————————————106.39@3730 rpm

Crossover post from the 2-stroke blog. Konig Racer. Really interesting engine cinfiguration.

this is a crossover post from the 2 stroke blog. I just did a cut and paste so i’s complete with updates from the readers. A really interesting bike and story.

Second Update: I’ve got the smartest readers on the web!

Lawrence wrote in:


A documentary about motor-racer Kim Newcombe, who turned heads in the 70s on a König motorbike he developed and designed himself. He was killed racing in 1973 and posthumously came second in that year’s World 500cc Grand Prix. The film mixes interviews and underdog triumph on the track scenes, with Super 8 footage of family life on the circuit, and poignant wife-of-maverick reflections from his widow Janeen. Love, Speed and Loss won best documentary at the 2007 Qantas TV Awards and Air NZ Screen Awards for best documentary, directing, and editing.
http://www.nzonscreen.com/title/love-speed-and-loss-2007


Also:
http://www.fasterandfaster.net/2010/01/love-speed-and-loss-remembering-kim.html

Thanks Again!  You guys are the best!

———————————————————————————————–

Update from the comments:
Hi,
it is not a twin engine. It is a 4 cylinder engine. Originally a motorboat engine.
Cheers Uwe

I suspected that it might be but it was hard to be certain from the camera angle. thank you for clearing that up! Makes it all the more interesting!

———————————————————————————————–

A liquid cooled opposed four cylinder with a gear driven, toothed belt rotary valve intake intake setup. Interesting stuff.

Update: Reader Ride. Another cross-over post from the 2 stroke board.

I know I’ve been cross posting from the other blog quite a bit lately but the 2-stroke pics I’ve been getting are just amazing!  Morgan Price sends in this amazing build…. Kawasaki / GSXR based radical 2-stroke fighter in progress.

For those of you interested in the building of this bike here is a link to the build thread I just stumbled across.  It’s even more impressive than I thought.

 http://kawaportal.org/phpBB2/viewtopic.php?t=2655&postdays=0&postorder=asc&start=0

Update: Radical Custom Guzzi.

Damm that’s different! Maybe not for everyone but I like it. Found this over on ADV Rider with no other significant info.

Update: Well here you go then. More info about the bike and builder!  Thanks to all of you who e-mailed and commented with the info.

http://www.wheelsmagazine.se/nyheter/article563501.ece

Reader Ride. Some Sweet Suzuki SRAD Fighter Action

Joe Dunderdale sent in this great Streetfighter build.

He writes:
I thought I’d send you a few pictures of my bike.
Its a 1998 GSXR 750 SRAD Street fighter, a modern interpretation of the Cafe Racer and in my opinion by definition a bike that is lighter and kicks out more power than its stock counterpart.


Specs:
1998 GSXR 750 SRAD FRAME
2001 GSXR 1000 ENGINE, HARNESS, CLOCKS, FUEL PUMP RETROFITTED IN THE 98 TANK.
LASER CUT SUBFRAME, ENGINE MOUNTS,
YOSHIMURA TRS SHORTENED TO 300 MM
KX MOTORCROSS BARS, CUSTOM BAR MOUNTS


147 HP 60LBS LIGHTER THAN THE 2001 GSXR 1000

That is freaking awesome! I love the raw metal look.  Thanks for the pic!