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Friday, December 3, 2010

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
Swept Area--------------------56.5 sq. in.
Brakes Loaded----------------8.8 lbs. per sq. in.
Curb Weight-------------------300 lbs. / 200 lb. rider - 500lbs.
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.
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

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