HONDA CR750

Joep Kortekaas' Honda 750 CR kitted race bike

Engine Analysis

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Motor    Power    Inlet System    Exhaust System     Friction and Drag

Restoration Process     Photo Gallery    Joep Koortekaas Page

 

THE EXHAUST SYSTEM

Exhaust valve diameter

28

mm

Exhaust valve area

616

mm2

Number of exhaust valves

1

Total exhaust valve area

616

mm2

Velocity of sound

800

m/s

Diameter of exhaust pipe

31

mm

Optimum dia. of exhaust pipe 7)

33

mm

Order of pulsation q = 6

Length of exhaust pipe

528

mm

Taper of megaphone 8)

2.77

°

Length of megaphone 10)

852

mm

L/k= 9)

1.33

Major diameter of megaphone 10)

72

mm

7) based on exhaust gas velocity of 70 m/s.

8) Should be between 2.5°and 4°

9) Should be between 1.3 and 2.8 according to Honda R&D

10) based on actual diameter of exhaust pipe

 

wpeD.jpg (28176 bytes)

Motor    Power    Inlet System    Exhaust System     Friction and Drag

Restoration Process

Photo Gallery

Joep Koortekaas Page

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Copyright: Murray Barnard/Joep Kortekaas - 1999