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Pics of my cams, anything bad? Good? Aftermarket?
- fivestring
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28 Mar 2012 11:58 #512519
by fivestring
4 out of 3 people have trouble with math
Current
1978 KZ1000A2A, hardtailed, bobbed and stretched
my build thread
1977 Yamaha XS750 (parting out)
1978 Honda CB750 Four
1981 Yamaha XS650
1982 Yamaha XS650
Former
1980 Kawasaki CSR750
1980 Suzuki GS850L
1982 Suzuki GS1100K
1987 Suzuki GSXR1100
1985...
Pics of my cams, anything bad? Good? Aftermarket? was created by fivestring
If anyone sees anything unusual, ie not stock, problems, please let me know. Just bought this old drag bike and don't know much history on it yet.
I see some wear on the cam lobes. I was thinking of trying to mic the lobes to see if these are higher lift than stock but not 100% sure how to do that. I was going to measure the base from side to side then measure from the base to the peak of the lobe. The difference would be total lift, right? Any suggestions welcome. And what would intake and exaust lift be on a stock cam?
Engine runs very well, btw. I just removed cover to freshen up gaskets and seals and thought I would explore a little and check valve adjustment. The ones I have checked so far are right about .10mm.
I see some wear on the cam lobes. I was thinking of trying to mic the lobes to see if these are higher lift than stock but not 100% sure how to do that. I was going to measure the base from side to side then measure from the base to the peak of the lobe. The difference would be total lift, right? Any suggestions welcome. And what would intake and exaust lift be on a stock cam?
Engine runs very well, btw. I just removed cover to freshen up gaskets and seals and thought I would explore a little and check valve adjustment. The ones I have checked so far are right about .10mm.
4 out of 3 people have trouble with math
Current
1978 KZ1000A2A, hardtailed, bobbed and stretched
my build thread
1977 Yamaha XS750 (parting out)
1978 Honda CB750 Four
1981 Yamaha XS650
1982 Yamaha XS650
Former
1980 Kawasaki CSR750
1980 Suzuki GS850L
1982 Suzuki GS1100K
1987 Suzuki GSXR1100
1985...
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- bountyhunter
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28 Mar 2012 15:59 #512558
by bountyhunter
1979 KZ-750 Twin
Replied by bountyhunter on topic Pics of my cams, anything bad? Good? Aftermarket?
Make sure you are using oil with sufficient ZDDP in it, or get the additive and put it in.fivestring wrote: I see some wear on the cam lobes.
1979 KZ-750 Twin
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- andy9802gt
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- If it tastes that good, eat it yourself.
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28 Mar 2012 16:40 #512580
by andy9802gt
'78 KZ1075 LTD
stage 1 head by Larry Cavanaugh
race built crank by John Pearson
Mikuni rs34's
k410 cams
back cut tranny
8" over D&G swinger
proving once again that age and treachery is better than youth and enthusiasm
Replied by andy9802gt on topic Pics of my cams, anything bad? Good? Aftermarket?
It looks like stock sprockets and I don't see any clearancing for big lift, so my guess is they're stockers.
'78 KZ1075 LTD
stage 1 head by Larry Cavanaugh
race built crank by John Pearson
Mikuni rs34's
k410 cams
back cut tranny
8" over D&G swinger
proving once again that age and treachery is better than youth and enthusiasm
The following user(s) said Thank You: fivestring
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- racer54
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29 Mar 2012 16:32 #512812
by racer54
1980 LTD (changed over the years), 1979 LTD (being rebuilt), 1977 KZ turbo and various KZ's in various states of build. KLX110
Replied by racer54 on topic Pics of my cams, anything bad? Good? Aftermarket?
You are right about checking the lift. Measure across the base of the cam and then from the base to highest point on lobe. Subtract base measurement fromt he lobe number and you will have the lift. May not be exact but will be close enough to let you know what you have. Stock cam spec.s are aprroximately .300 on the exhaust and approx. .325 on the intake. Those numbers aren't right but they are close.
1980 LTD (changed over the years), 1979 LTD (being rebuilt), 1977 KZ turbo and various KZ's in various states of build. KLX110
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- APE Jay
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30 Mar 2012 01:29 #512940
by APE Jay
Replied by APE Jay on topic Pics of my cams, anything bad? Good? Aftermarket?
At least you have some nice head nuts. :laugh:
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- fivestring
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01 Apr 2012 14:45 #513392
by fivestring
4 out of 3 people have trouble with math
Current
1978 KZ1000A2A, hardtailed, bobbed and stretched
my build thread
1977 Yamaha XS750 (parting out)
1978 Honda CB750 Four
1981 Yamaha XS650
1982 Yamaha XS650
Former
1980 Kawasaki CSR750
1980 Suzuki GS850L
1982 Suzuki GS1100K
1987 Suzuki GSXR1100
1985...
Replied by fivestring on topic Pics of my cams, anything bad? Good? Aftermarket?
I just measured them:
.362 intake
.366 exhaust
is that still considered stock cams?
.362 intake
.366 exhaust
is that still considered stock cams?
4 out of 3 people have trouble with math
Current
1978 KZ1000A2A, hardtailed, bobbed and stretched
my build thread
1977 Yamaha XS750 (parting out)
1978 Honda CB750 Four
1981 Yamaha XS650
1982 Yamaha XS650
Former
1980 Kawasaki CSR750
1980 Suzuki GS850L
1982 Suzuki GS1100K
1987 Suzuki GSXR1100
1985...
Please Log in or Create an account to join the conversation.
- DoubleDub
- Visitor
01 Apr 2012 14:56 #513393
by DoubleDub
Replied by DoubleDub on topic Pics of my cams, anything bad? Good? Aftermarket?
No, not for an A2. Might be something similar to webcam 118's.
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- fivestring
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01 Apr 2012 23:20 #513492
by fivestring
4 out of 3 people have trouble with math
Current
1978 KZ1000A2A, hardtailed, bobbed and stretched
my build thread
1977 Yamaha XS750 (parting out)
1978 Honda CB750 Four
1981 Yamaha XS650
1982 Yamaha XS650
Former
1980 Kawasaki CSR750
1980 Suzuki GS850L
1982 Suzuki GS1100K
1987 Suzuki GSXR1100
1985...
Replied by fivestring on topic Pics of my cams, anything bad? Good? Aftermarket?
That's good news.
4 out of 3 people have trouble with math
Current
1978 KZ1000A2A, hardtailed, bobbed and stretched
my build thread
1977 Yamaha XS750 (parting out)
1978 Honda CB750 Four
1981 Yamaha XS650
1982 Yamaha XS650
Former
1980 Kawasaki CSR750
1980 Suzuki GS850L
1982 Suzuki GS1100K
1987 Suzuki GSXR1100
1985...
Please Log in or Create an account to join the conversation.