BritBike Forum logo
BritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorThe Bonneville ShopBritBike Sponsor
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments.
Buy BritBike staff a coffee
Buy BritBike's staff a coffeeStill here since 1996 serving BritBike enthusiasts..
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Member Spotlight
Ron Trump Arbour
Ron Trump Arbour
Herkimer, NY
Posts: 85
Joined: January 2005
Show All Member Profiles 
Newest Members
Psychorider, Shedengineering, Shayne Brown, Snow's Cycles, Scottboy
10858 Registered Users
Top Posters(30 Days)
franko 168
reverb 63
NickL 53
quinten 53
Popular Topics(Views)
1,005,157 mail-order LSR
a word from..
Forum Statistics
Forums34
Topics67,717
Posts679,760
Members10,858
Most Online14,755
May 5th, 2019
Who's Online Now
79 registered members (Allan Gill), 714 guests, and 752 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Cam comparison A65 #784073 09/12/19 7:11 pm
Joined: Aug 2019
Posts: 26
W
Walker22 Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
W
Joined: Aug 2019
Posts: 26
I have an old cam and new cam from megacycle cam. I noticed the new cam on the right has a smaller profile where ive got the screwdriver bit leaned on. Im still waiting for the cases to come back from machine shop before assembly but is this normal or should i be concerned? Bonus points for explaining any of the numbers on timing card smile

[Linked Image from i969.photobucket.com]


Dirty Hands Clean Money
Support Your #1 BritBike Forum!

Check out British motorcycles for sale:
British Motorcycles on e-Bay UK
British motorcycles on e-Bay North America
Re: Cam comparison A65 [Re: Walker22] #784075 09/12/19 7:12 pm
Joined: Aug 2019
Posts: 26
W
Walker22 Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
W
Joined: Aug 2019
Posts: 26
sorry i really need to get this photo posting thing figured out....


Dirty Hands Clean Money
Re: Cam comparison A65 [Re: Walker22] #784076 09/12/19 7:15 pm
Joined: Dec 2002
Posts: 551
M
MarcB Online Content
BritBike Forum member
Online Content
BritBike Forum member
M
Joined: Dec 2002
Posts: 551
A bit out of focus, no?

The right-side of the cam goes through 2 bushings, with a gap between them. Hence, two bearing surfaces with a gap in the section that isn't used.

FYI: I've switched to imgur for image Hosting.

Re: Cam comparison A65 [Re: MarcB] #784080 09/12/19 7:25 pm
Joined: Aug 2019
Posts: 26
W
Walker22 Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
W
Joined: Aug 2019
Posts: 26
https://imgur.com/gallery/ZNbWogp

Thank you. My question is why is the profile smaller on the new cam on right?

Last edited by Walker22; 09/12/19 7:26 pm.

Dirty Hands Clean Money
Re: Cam comparison A65 [Re: Walker22] #784087 09/12/19 8:53 pm
Joined: Dec 2004
Posts: 10,056
kommando Online Content
BritBike Forum member
Online Content
BritBike Forum member
Joined: Dec 2004
Posts: 10,056
It's a gap for clearance, makes no difference so there is a very wide tolerance on it.

Re: Cam comparison A65 [Re: Walker22] #784144 09/13/19 12:45 pm
Joined: Aug 2019
Posts: 26
W
Walker22 Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
W
Joined: Aug 2019
Posts: 26
Thanks Gents!


Dirty Hands Clean Money
Re: Cam comparison A65 [Re: Walker22] #784151 09/13/19 1:36 pm
Joined: Oct 2017
Posts: 272
N
Nick H Online Content
BritBike Forum member
Online Content
BritBike Forum member
N
Joined: Oct 2017
Posts: 272
The numbers on the card tell when the cam will begin to open and finish closing your valves at degrees before or after top or bottom dead center of the piston. (ex: BTC = Before top center)
There's more info there but you and I will have to do our homework to understand it better.

Last edited by Nick H; 09/13/19 1:38 pm.

1966 BSA Lightning
1967 Triumph "Choppa"
Re: Cam comparison A65 [Re: Walker22] #784160 09/13/19 3:06 pm
Joined: May 2013
Posts: 5,873
Allan Gill Online Happy
BritBike Forum member
Online Happy
BritBike Forum member
Joined: May 2013
Posts: 5,873
Need the beer goggles to read it. laughing


beerchug
Re: Cam comparison A65 [Re: Walker22] #784597 09/17/19 4:59 pm
Joined: Jan 2006
Posts: 2,657
Gary E Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Jan 2006
Posts: 2,657
Use a photo Hosting site other than Photobucket. For me I use postimages.org.


1967 BSA Wasp
1967 BSA Hornet (West Coast Model)
1967 BSA Hornet (East Coast Model)
1968 BSA Firebird Scrambler
1968 BSA Spitfire Mark IV

Moderated by  Allan Gill, Jon W. Whitley 

Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | DVD- Manuals & Parts books
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.7.3