kz440 1981 camshaft degree

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kz440 1981 camshaft degree

12 Oct 2025 11:04 - 13 Oct 2025 03:34
#918040
I'm trying to figure out if I'm losing power somewhere so I decided to degree my camshaft.
Just in case anyone needs numbers for comparison.

Camshaft specs kz440 1981 D2 

oct 11 2025
temp 63˚ f
humidity 70%
baro 30.18 in/hg 

intake left side
starts to open 47˚ BTDC .005”
.050” opening 8˚ ATDC
.309” max lift 62.5˚ BBDC
.050” closing 47.5˚ ABDC
duration at .050” 216.5 

intake right side
starts to open 76˚ BTDC .0005”
.050” opening 6.5˚ ATDC
.309” max lift at 61˚ BBDC
.050” close at 47.5˚ ABDC
fully closed by 47.5˚ BTDC
duration at .050” 221˚ 

exhaust left side
starts to open 69˚ ATDC .002”
.050” opening 32.5˚ BBDC
max lift .313” at 76.5˚ ABDC
.050” closing at 1˚ ATDC
fully closed by 80˚ BBDC
duration at .050” 213˚ 

exhaust right side
starts to open at 64˚ ATDC .001”
.050” opening at 33˚ BBDC
max lift .313” at 75˚ ABDC
.050” closing 0˚ TDC
duration .050” 213˚  


I used: 
1-M8x1.25x130mm full threaded stud
3-M8x1.25x30mm hex coupler standoff nut
1-M8x1.25x16mm hex bolt
purchased from Belmetric
Motion Pro degree wheel had to be drilled out to 8mm as the center hole was only 6mm.


 


 
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
Last edit: 13 Oct 2025 03:34 by F64.

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Re: kz440 1981 camshaft degree

12 Oct 2025 17:45
#918049
Curious to why you included temp/humidity/baro pressure? 
1978 KZ650B2 w 1197cc Z1 engine
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project


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Re: kz440 1981 camshaft degree

13 Oct 2025 03:06 - 13 Oct 2025 03:15
#918055
I try to make it a habit of recording the weather conditions when I take any critical measurements.
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
Last edit: 13 Oct 2025 03:15 by F64.

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