VHM Cylinder Heads
COMBUSTION CHAMBER VOLUME: 5.55 cc
SQUASH EDGE DIMENSION: 0.75 mm
PISTON HEIGHT: +0.55 mm
PISTON BOTTOM TYPE: FLAT, 12�
COMBUSTION CHAMBER VOLUME: 5.40 cc
SQUASH EDGE DIMENSION: 0.75 mm
PISTON HEIGHT: +0.55 mm
PISTON BOTTOM TYPE: FLAT, 12�
BURN CHAMBER VOLUME: 5.25 cc
SQUASH EDGE DIMENSION: 0.75 mm
PISTON HEIGHT: +0.55 mm
PISTON BOTTOM TYPE: FLAT, 12�
COMBUSTION CHAMBER VOLUME: 11.40 cc
SQUARE EDGE DIMENSION: 1.40 mm
PISTON HEIGHT: 2 mm
PISTON BOTTOM TYPE: DOME
COMBUSTION CHAMBER VOLUME: 11.50 cc
SQUASH EDGE DIMENSION: 1.40 mm
PISTON HEIGHT: 2 mm
PISTON BOTTOM TYPE: DOME
COMBUSTION CHAMBER VOLUME: 11.40 cc
SQUARE EDGE DIMENSION: 1.40 mm
PISTON HEIGHT: 2 mm
PISTON BOTTOM TYPE: DOME
COMBUSTION CHAMBER VOLUME: 11.80 cc
SQUARE EDGE DIMENSION: 0.90 mm
PISTON HEIGHT: -0.35 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
STANDARD VHM COMBUSTION CHAMBER
COMBUSTION CHAMBER VOLUME: 12.00 cc
SQUASH EDGE DIMENSION: 0.90 mm
PISTON HEIGHT: -0.35 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
IDEAL FOR DEEP SAND AND/OR SHORT DISTANCES
BURNER CHAMBER VOLUME: 10.8 cc
SQUASH EDGE DIMENSION: 1.00 mm
PISTON HEIGHT: -0.10 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
MORE TORQUE, MORE PEAK PERFORMANCE
IDEAL FOR TOUGH AND/OR LONGER RIDES
BURNER CHAMBER VOLUME: 11.2 cc
SQUASH EDGE DIMENSION: 1.00 mm
PISTON HEIGHT: -0.10 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
BURNER CHAMBER VOLUME: 11.0 cc
SQUASH EDGE DIMENSION: 1.00 mm
PISTON HEIGHT: -0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
IDEAL FOR DEEP SAND AND/OR SHORT DISTANCES
BURNER CHAMBER VOLUME: 17.20 cc
SQUASH EDGE DIMENSION: 1.40 mm
PISTON HEIGHT: +1.50 mm
PISTON BOTTOM TYPE: DOME
MORE TORQUE, MORE PEAK PERFORMANCE
IDEAL FOR TOUGH AND/OR LONGER RIDES
BURN CHAMBER VOLUME: 18.00 cc
SQUASH EDGE DIMENSION: 1.40 mm
PISTON HEIGHT: +1.50 mm
PISTON BOTTOM TYPE: DOME
BURNER CHAMBER VOLUME: 17.60 cc
SQUASH EDGE DIMENSION: 1.40 mm
PISTON HEIGHT: +1.50 mm
PISTON BOTTOM TYPE: DOME
IDEAL FOR DEEP SAND AND/OR SHORT DISTANCES
BURNER CHAMBER VOLUME: 21.00 cc
SQUASH EDGE DIMENSION: 1.70 mm
PISTON HEIGHT: +3.60 mm
PISTON BOTTOM TYPE: DOME
MORE TORQUE, MORE PEAK PERFORMANCE
IDEAL FOR TOUGH AND/OR LONGER RIDES
BURN CHAMBER VOLUME: 22.00 cc
SQUASH EDGE DIMENSION: 1.70 mm
PISTON HEIGHT: +3.60 mm
PISTON BOTTOM TYPE: DOMED
BURNER CHAMBER VOLUME: 21.50 cc
SQUASH EDGE DIMENSION: 1.70 mm
PISTON HEIGHT: +3.60 mm
PISTON BOTTOM TYPE: DOME
IDEAL FOR DEEP SAND AND/OR SHORT DISTANCES
COMBUSTION CHAMBER VOLUME: 27.50 cc
SQUASH EDGE DIMENSION: 1.80 mm
PISTON HEIGHT: 0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
IDEAL FOR DEEP SAND AND/OR SHORT DISTANCES
COMBUSTION CHAMBER VOLUME: 27.50 cc
SQUASH EDGE DIMENSION: 1.80 mm
PISTON HEIGHT: +3.50 mm
PISTON BOTTOM TYPE: DOME
MORE TORQUE, MORE PEAK PERFORMANCE
IDEAL FOR TOUGH AND/OR LONGER RIDES
COMBUSTION CHAMBER VOLUME: 29.50 cc
SQUASH EDGE DIMENSION: 1.80 mm
PISTON HEIGHT: 0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
MORE TORQUE, MORE PEAK PERFORMANCE
IDEAL FOR TOUGH AND/OR LONGER RIDES
COMBUSTION CHAMBER VOLUME: 29.50 cc
SQUASH EDGE DIMENSION: 1.80 mm
PISTON HEIGHT: +3.50 mm
PISTON BOTTOM TYPE: DOME
COMBUSTION CHAMBER VOLUME: 28.50 cc
SQUARE EDGE DIMENSION: 1.80 mm
PISTON HEIGHT: 0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
COMBUSTION CHAMBER VOLUME: 28.50 cc
SQUASH EDGE DIMENSION: 1.80 mm
PISTON HEIGHT: +3.50 mm
PISTON BOTTOM TYPE: DOME
BURNER CHAMBER VOLUME: 27.00 cc
SQUASH EDGE DIMENSION: 1.80 mm
PISTON HEIGHT: +3.10 mm
PISTON BOTTOM TYPE: DOME
COMBUSTION CHAMBER VOLUME: 28.00 cc
SQUASH EDGE DIMENSION: 1.80 mm
PISTON HEIGHT: +3.10 mm
PISTON BOTTOM TYPE: DOME
HIGH-COMP VHM COMBUSTION CHAMBER FOR MORE TORQUE AT LOW ENGINE SPEEDS
IDEAL FOR DEEP SAND AND/OR SHORT DISTANCES
COMBUSTION CHAMBER VOLUME: 20.20 cc
SQUASH EDGE DIMENSION: 1.3 mm
PISTON HEIGHT: -0.3 mm
PISTON TYPE: FLAT BOTTOM
COMBUSTION CHAMBER VOLUME: 27.5 cc
SQUASH EDGE DIMENSION: 1.90 mm
PISTON HEIGHT: 0 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
COMBUSTION CHAMBER VOLUME: 10.80 cc
SQUASH EDGE DIMENSION: 1.00 mm
PISTON HEIGHT: -0.55 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
BURN CHAMBER VOLUME: 11.80 cc
SQUASH EDGE DIMENSION: 0.90 mm
PISTON HEIGHT: +0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
COMBUSTION CHAMBER VOLUME: 28.50 cc
SQUASH EDGE DIMENSION: 1.70 mm
PISTON HEIGHT: 0.00 mm
PISTON BOTTOM TYPE: FLAT
BURN CHAMBER VOLUME: 11.80 cc
SQUASH EDGE DIMENSION: 1.00 mm
PISTON HEIGHT: +0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
With this blind insert, you can machine the combustion chamber specifications yourself. This gives you the flexibility to experiment with your own ideas.
Only to be used in combination with the DA31247 base gasket
COMBUSTION CHAMBER VOLUME: 24.00 cc
SQUASH EDGE DIMENSION: 1.70 mm
PISTON HEIGHT: +3.70 mm
PISTON BOTTOM TYPE: DOME
BURNER CHAMBER VOLUME: 22.20 cc
SQUASH EDGE DIMENSION: 1.60 mm
PISTON HEIGHT: +3.70 mm
PISTON BOTTOM TYPE: DOME
BURN CHAMBER VOLUME: 11.60 cc
SQUASH EDGE DIMENSION: 1.00 mm
PISTON HEIGHT: 0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
IDEAL FOR DEEP SAND AND/OR SHORT DISTANCES
BURNER CHAMBER VOLUME: 26.50 cc
SQUASH EDGE DIMENSION: 1.90 mm
PISTON HEIGHT: 0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
IDEAL FOR DEEP SAND AND/OR SHORT DISTANCES
BURNER CHAMBER VOLUME: 26.25 cc
SQUASH EDGE DIMENSION: 1.90 mm
PISTON HEIGHT: 0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
MORE TORQUE, MORE PEAK PERFORMANCE
IDEAL FOR TOUGH AND/OR LONGER JOURNEYS
BURN CHAMBER VOLUME: 28.50 cc
SQUASH EDGE DIMENSION: 1.90 mm
PISTON HEIGHT: 0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
COMBUSTION CHAMBER VOLUME: 27.50 cc
SQUASH EDGE DIMENSION: 1.90 mm
PISTON HEIGHT: 0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
IDEAL FOR DEEP SAND AND/OR SMALLER TRACKS
BURNER CHAMBER VOLUME: 11.40 cc
SQUASH EDGE DIMENSION: 0.90 mm
PISTON HEIGHT: +0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
BURN CHAMBER VOLUME: 11.60 cc
SQUASH EDGE DIMENSION: 0.90 mm
PISTON HEIGHT: +0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
IDEAL FOR DEEP SAND AND/OR SHORT DISTANCES
BURNER CHAMBER VOLUME: 13.40 cc
SQUASH EDGE DIMENSION: 1.10 mm
PISTON HEIGHT: 0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
MORE TORQUE, MORE PEAK PERFORMANCE
IDEAL FOR TOUGH AND/OR LONGER RIDES
BURN CHAMBER VOLUME: 13.80 cc
SQUASH EDGE DIMENSION: 1.10 mm
PISTON HEIGHT: 0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
BURNER CHAMBER VOLUME: 13.60 cc
SQUASH EDGE DIMENSION: 1.10 mm
PISTON HEIGHT: +0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
SQUARE RATIO: 0.00 mm
PISTON HEIGHT: 1.90 mm
PISTON BOTTOM TYPE: DOME
MIN. RON98 FUEL
STANDARD VHM COMBUSTION CHAMBER FOR OPTIMAL OVERALL PERFORMANCE.
BURNER CHAMBER VOLUME: 9.75 cc
SQUASH EDGE DIMENSION: 0.90 mm
PISTON HEIGHT: +4.05 mm
PISTON BOTTOM TYPE: ROLLED
IDEAL FOR DEEP SAND AND/OR SMALLER TRACKS
BURNER CHAMBER VOLUME: 11.40 cc
SQUASH EDGE DIMENSION: 1.00 mm
PISTON HEIGHT: +0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
BURN CHAMBER VOLUME: 11.60 cc
SQUASH EDGE DIMENSION: 1.00 mm
PISTON HEIGHT: +0.00 mm
PISTON BOTTOM TYPE: FLAT BOTTOM
BURN CHAMBER VOLUME: 11.00 cc
SQUASH EDGE DIMENSION: 0.90 mm
PISTON HEIGHT: +0.0 mm
PISTON BOTTOM TYPE: 12� FLAT BOTTOM
VHM Cylinder Heads: engineered for motocross and enduro riders. Strong materials, precise fitment and reliable performance.





