Calculating Minimum Weight
1.
Rotary valve or Reed valve Two-Stroke Cycle Engine or Engines, 230 lbs
plus one pound for each cc or fraction of a cc. Multiple engines or cylinders
are permissible. 255 cc maximum total displacement.
If this particular engine measured out to be 134.2cc the weight
would be calculated as follows;
230 lbs (base weight) + 135 (rounded up to next whole cc) = 365 lbs
2.
Flat Head Four-Stroke Cycle Engine or Engines, 190 lbs plus one
pound for every 3cc or fraction of a cc. Multiple engines or cylinders are permissible. 500cc
maximum total displacement.
If this engine measured out to be 251.2 cc the weight would be
calculated as follows;
Round up the cc to 252.
Divide 252 by 3. That = 84
190 lbs (base weight) + 84 (pounds added for engine disp.) = 274
lbs
3.
Piston Port, McCulloch or US820 (West Bend) Two-Stroke Cycle Engine or engines, 170 pounds
plus one pound for every cc or fraction of a cc. Multiple engines or cylinders
are permissible. 255 cc maximum total displacement.
If the engine pictured measured 98.7cc the weight would be calculated
as follows;
170 lbs (base weight) + 99 (displacement rounded up) = 269 lbs
4.
Overhead Cam (OHC) Four-Stroke Cycle Engine or Engines, 245 lbs
plus one pound for every 2 cc or fraction of a cc. Multiple engines or cylinders
are permissible. 500cc maximum total displacement.
If this engine measured 249.2 cc the minimum weight would be calculated as
follows;
Divide 249.2 cc by 2 which equal 124.6
Round
124.6 up to 125.
245lbs (base weight) + 125 = 370 lbs
5.
Overhead Valve Push Rod (OHV) Four-Stroke Cycle Engine or
Engines, 200 lbs plus one pound for every 2.5 cc or fraction of a cc. Multiple
engines or cylinders are permissible. 500cc maximum total displacement.
If this engine measured 206.8cc the minimum weight would be calculated as
follows;
Divide 206.8 cc by 2.5 which = 103.4
Round up 103.4 to 104cc
200 lbs (base weight) + 104 = 304 lbs
1.
Rotary valve or Reed valve Two-Stroke Cycle Engine or Engines, 230 lbs
plus one pound for each cc or fraction of a cc. Multiple engines or cylinders
are permissible. 255 cc maximum total displacement.
If this particular engine measured out to be 134.2cc the weight
would be calculated as follows;
230 lbs (base weight) + 135 (rounded up to next whole cc) = 365 lbs
2.
Flat Head Four-Stroke Cycle Engine or Engines, 190 lbs plus one
pound for every 3cc or fraction of a cc. Multiple engines or cylinders are permissible. 500cc
maximum total displacement.
If this engine measured out to be 251.2 cc the weight would be
calculated as follows;
Round up the cc to 252.
Divide 252 by 3. That = 84
190 lbs (base weight) + 84 (pounds added for engine disp.) = 274
lbs
3.
Piston Port, McCulloch or US820 (West Bend) Two-Stroke Cycle Engine or engines, 170 pounds
plus one pound for every cc or fraction of a cc. Multiple engines or cylinders
are permissible. 255 cc maximum total displacement.
If the engine pictured measured 98.7cc the weight would be calculated
as follows;
170 lbs (base weight) + 99 (displacement rounded up) = 269 lbs
4.
Overhead Cam (OHC) Four-Stroke Cycle Engine or Engines, 245 lbs
plus one pound for every 2 cc or fraction of a cc. Multiple engines or cylinders
are permissible. 500cc maximum total displacement.
If this engine measured 249.2 cc the minimum weight would be calculated as
follows;
Divide 249.2 cc by 2 which equal 124.6
Round
124.6 up to 125.
245lbs (base weight) + 125 = 370 lbs
5.
Overhead Valve Push Rod (OHV) Four-Stroke Cycle Engine or
Engines, 200 lbs plus one pound for every 2.5 cc or fraction of a cc. Multiple
engines or cylinders are permissible. 500cc maximum total displacement.
If this engine measured 206.8cc the minimum weight would be calculated as
follows;
Divide 206.8 cc by 2.5 which = 103.4
Round up 103.4 to 104cc
200 lbs (base weight) + 104 = 304 lbs