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ZB Touring Cam Specs #710776
10/07/17 11:10 am
10/07/17 11:10 am
Joined: Aug 2001
Posts: 5,124
Stone Creek OH USA
R
Rich B Offline OP

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Rich B  Offline OP

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Stone Creek OH USA
I have looked around in my literature and seem to have a lot of blanks. So, I will ask here.

Does anyone have the specs for the ZB touring cams 65-2438 & 65-2436? I just acquired a set for a long stalled M33 project and would like to record the cam info before I install them.


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Re: ZB Touring Cam Specs [Re: Rich B] #710816
10/07/17 9:33 pm
10/07/17 9:33 pm
Joined: Feb 2011
Posts: 3,539
Orygone
Boomer Online content

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Orygone
I have those cams in my BB34GS and had a hard time finding info. I think it was in Nickerson book that said .002 nd .004. They are the same profile as 65-2448 and 65-2450 except those have Hosting ramps and wider clearances.


Bill B...


Boomer
Re: ZB Touring Cam Specs [Re: Boomer] #710830
10/07/17 11:56 pm
10/07/17 11:56 pm
Joined: Aug 2001
Posts: 5,124
Stone Creek OH USA
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Rich B Offline OP

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Rich B  Offline OP

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Stone Creek OH USA
Thanks Bill.

I had kind of "assumed" the specs were similar to the later touring cams. But just wanted to have a better idea what I am installing. Got to take advantage of the larger valves and ports some one had put into the head I am using.


Never underestimate the human ability to elevate stupid to a whole new level!.
Re: ZB Touring Cam Specs [Re: Boomer] #710883
10/08/17 4:18 pm
10/08/17 4:18 pm
Joined: Feb 2011
Posts: 3,539
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Originally Posted by Boomer
I have those cams in my BB34GS and had a hard time finding info. I think it was in Nickerson book that said .002 nd .004. They are the same profile as 65-2448 and 65-2450 except those have Hosting ramps and wider clearances.


Bill B...




Typed that on my phone and sent before I saw the auto corrected spelling. That should say quieting ramps.


Have fun with the valve adjusting. It takes three open end wrenches and feeler gauges along with a set of arthritic fingers to fit into a 2" by 3" opening. Usually takes me a couple of hours to do this chore.


Bill B...


Boomer
Re: ZB Touring Cam Specs [Re: Rich B] #711149
10/10/17 9:43 pm
10/10/17 9:43 pm
Joined: Feb 2015
Posts: 135
UK
F
flowboy Offline
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UK
I have timing for the 65-2438 & 65-2436 as; 43 73 70 45, with gaps checked at .001" in ZB ally engines.
Listed as Touring, Clubmans & Racing cams '49-'51 (with 10 deg. advance pinion in case of 350 racing.
Timing is taken from the cams that directly replaced them, as Boomer said; 65-2448 & 2450. The early ones will be noisier!
Also as Boomer said, fiddly job!


na
Re: ZB Touring Cam Specs [Re: flowboy] #711164
10/10/17 11:28 pm
10/10/17 11:28 pm
Joined: Aug 2001
Posts: 5,124
Stone Creek OH USA
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Rich B Offline OP

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Rich B  Offline OP

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Stone Creek OH USA
Thanks! Yea I know it is a fiddle job. Not so worried about noisy, hoping the cast iron M33 engine dampens the noise some.


Never underestimate the human ability to elevate stupid to a whole new level!.
Re: ZB Touring Cam Specs [Re: Rich B] #713715
11/03/17 3:18 pm
11/03/17 3:18 pm
Joined: May 2013
Posts: 30
Ireland
Z
ZeBe Offline
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Ireland
Is there not a consideration of higher lift and potential valve guide interference when installing GS cams (even the touring items) into a non-GS motor? I seem to recall seeing a factory note about this at some point.

Gerry

Re: ZB Touring Cam Specs [Re: ZeBe] #713771
11/03/17 11:28 pm
11/03/17 11:28 pm
Joined: Aug 2001
Posts: 5,124
Stone Creek OH USA
R
Rich B Offline OP

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Rich B  Offline OP

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Joined: Aug 2001
Posts: 5,124
Stone Creek OH USA
I will be finding out and will report back. Comparing the cams I acquired with the stock 2420 grind to the 2442/2446 cams I have, the touring cams are not significantly more lift than the 2420 grind. But the duration is significantly more.

The head on this bike was modified some time ago and has never been used. It actually has GS valves installed. I will check for spring bind and guide interference.


Never underestimate the human ability to elevate stupid to a whole new level!.
Re: ZB Touring Cam Specs [Re: Rich B] #713868
11/04/17 9:39 pm
11/04/17 9:39 pm
Joined: Oct 2014
Posts: 63
Lancashire. England.
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resingled Offline
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Lancashire. England.
I have a non gold star engine (BB34) that came with 2448/50 cams and have had no problems with them. They are noisy though and I have checked them three times recently but the clearances have remained correct at 8 and 10 thou. Decided to ignore them and enjoy the ride. I have to agree that trying to adjust them is a real P I T A. Dave.

Re: ZB Touring Cam Specs [Re: Rich B] #713872
11/04/17 10:21 pm
11/04/17 10:21 pm
Joined: Aug 2015
Posts: 1,301
Bolton Lancs UK
A
Andy Higham Offline
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Posts: 1,301
Bolton Lancs UK
I have gold star clubman cams in my 400cc B31, the power delivery is virtually linear from idle to 7000 rpm


BSA B31 500cc "Stargazer"
Greeves 200cc "Blue Meanie"
Greeves 350
Greeves 360 Challenger
Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc "Llareggub"
2003 Aprilia RSV Mille "Lo Stregone"
'35 OK Supreme
'36 OK Supreme

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