Make:HONDA                       ROCKER RATIO 1.4:1

Model:CS XR Rc                  Xr 250- 500cc
Ivan Tighe Engineering Pty Ltd

Tel (07) 3271 6001
Fax (07) 3271 6005

Email: sales@tighecams.com.au


Profile
Number

Advertised Timings

DURATION

VALVE LIFT

TAPPET
CLEARANCE

REMARKS
 

Ex Op.
B.B.D.C.

Ex Cl
A.T.D.C

In Op.
B.T.D.C.

In Cl
A.B.D.C

Advertised

@ 0.050”

Gross.

@ T.D.C.

Ex.

In.

  

578

65

25

25

60

270

265

    

0.375”

0.375”

    

0.006”

0.004”

Standard 500cc

516

70

30

30

70

280

280

    

0.412”

0.412”

    

0.006”

0.004”

Mild

516X

70

30

36

64

280

280

    

0.412”

0.412”

    

0.006”

0.004”

  

356

72

34

41

75

286

294

    

0.435”

0.500”

    

0.008”

0.006”

Speedway

399

79

45

50

70

304

300

    

0.412”

0.412”

    

0.006”

0.008”

Speedway

Notes:           -Profiles can be used on both 250cc and 500cc Xl and Xr  engines.

                        -Valve springs are required on the 250cc engine at 0.412” lift.

                        -New camshafts available.