CA77 Cam Lift Specification?

conbs · Post by **conbs** » Tue Mar 15, 2011 12:11 pm

I am a little late to the party, but have found CA cams like what George has.

Intake and exhaust lobes are the same heighth. I got essentially the same measurements that Graham did, though these cams do not seem worn. 31.63; 31.62 and 31.60; 31.60. I don't know what bike this came from. I bought just the head on ebay.

The followers have the lube holes on the pivot boss, not on the pad.

conbs · Post by **conbs** » Tue Mar 15, 2011 11:27 pm

I contacted the ebayer that sold me the head. He says it came off of CA77E 317329. I would assume that would make it a '63 except that the numbers in Bill Silver's '06 Dream Resto CD only go up to CA77E 314731 for '63. Hmmm.

GeorgeP1111 · Post by **GeorgeP1111** » Fri Mar 18, 2011 9:57 pm

conbs wrote:I am a little late to the party, but have found CA cams like what George has.
Intake and exhaust lobes are the same height.

Gee now you went and ruined it for me, I thought I had a "One of a Kind" cam. I had visions of selling it on eBay for a Bazillion dollars!! :-(

George

G-Man · Post by **G-Man** » Sat Mar 19, 2011 2:21 am

George

Unlucky!!

Now if you had some like this, you could have real fun. If you look closely at the Megacycle Cam you can see the original profile that they've built up.

G

GeorgeP1111 · Post by **GeorgeP1111** » Sat Mar 19, 2011 10:13 am

G-Man wrote:George

Unlucky!!

Now if you had some like this, you could have real fun. If you look closely at the Megacycle Cam you can see the original profile that they've built up.

G

Are you saying that your OEM cam also has the Intake/Exhaust the same (they look the same in your photo)? Was the Megacycle Cam suppose to be a direct replacement for the OEM? Looks a lot taller.

tnx
George

G-Man · Post by **G-Man** » Sat Mar 19, 2011 1:18 pm

George

Despite the photo, I haven't actually measured them. The CYB is a genuine Honda 'race kit' cam and the Megacycle one is their top race cam for CBs.

I'll get some dimensions for you.

G

G-Man · Post by **G-Man** » Sat Mar 19, 2011 1:29 pm

George

My Megacycle 12120 cam has the following spec

Lift Intake 0.330" Exhaust 0.330"
Duration 325deg 317deg
Largest dimension 32.47mm 31.73

CYB - Honda Race Kit cam

Largest dimension 31.59 31.21

Don't have any lift figures for the CYB but the duration is much shorter than the Megacycle. Interesting that the Magacycle claims identical lifts but the lobes are different heights.

G

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