VALVE TIMING

Anything about Ariels
T.J.Falloon
Posts: 32
Joined: Thu Sep 21, 2017 1:36 pm
Contact:

VALVE TIMING

Postby T.J.Falloon » Wed Aug 21, 2019 8:13 am

Hello all,

About to go through the process of setting the valve timing on my 1951 Mk1 Sq 4.

I have read Wallers version and Bruce Longmans version of how to set the valve timing and find both of them somewhat confusing and my eyes glaze over.
I know to some I must appear to be a moron, however I find it easier to learn by seeing something being done rather than reading about it. I understand the principle but the execution is what is missing in my mind.
To that end does anyone have a step by step with photos they would be prepared to share with me.

T.I.A
Last edited by T.J.Falloon on Wed Aug 21, 2019 10:38 am, edited 1 time in total.

User avatar
Eero.Korhonen
Holder of a Silver Anorak
Holder of a Silver Anorak
Posts: 835
Joined: Tue Sep 04, 2012 10:02 am
Location: Oulu, Finland
Contact:

Re: VALVE TIMING

Postby Eero.Korhonen » Wed Aug 21, 2019 9:51 am

Hello,
What model do you have?
Br, Eero
Ariel VH 1954, IZH 350 1962, H-D Sportster Hugger 1992, AOMCC Member 133

T.J.Falloon
Posts: 32
Joined: Thu Sep 21, 2017 1:36 pm
Contact:

Re: VALVE TIMING

Postby T.J.Falloon » Wed Aug 21, 2019 10:14 am

Hi Eero,

I have a 1951 Mk1 Square 4.

terrychesterton
Posts: 1
Joined: Mon Aug 19, 2019 7:37 pm
Contact:

Re: VALVE TIMING

Postby terrychesterton » Wed Aug 21, 2019 7:48 pm

You are definitely not a moron. I have a 1953 MKII. setting the valve timing took me a week plus a two hour talk to Mr Longman. getting your head around what has to happen is the key. I doubt very much you will get pics of the event. Mr Longmans system works. My bike is amazing but it took literally four days. I will try to help, but to do so will have to go back to the document.

T.J.Falloon
Posts: 32
Joined: Thu Sep 21, 2017 1:36 pm
Contact:

Re: VALVE TIMING

Postby T.J.Falloon » Wed Aug 21, 2019 11:15 pm

Thanks Terry, appreciate your support.

KevinOToole
Posts: 36
Joined: Fri Apr 27, 2018 4:36 pm
Contact:

Re: VALVE TIMING

Postby KevinOToole » Tue Sep 03, 2019 6:09 pm

Just in case you haven't got the Bruce Longman info., it's available at Draganflys https://www.draganfly.co.uk/data/pdf/SQ ... timing.pdf
It took me a while to get to grips with it. To get is spot on, I cut extra keyways in the camshaft sprocket.

KevinOToole
Posts: 36
Joined: Fri Apr 27, 2018 4:36 pm
Contact:

Re: VALVE TIMING

Postby KevinOToole » Tue Sep 03, 2019 6:31 pm

By cutting two new keyways at about 120° before and after the original keyway, it gave me a lot of adjustment to get the timing spot on. I should have only had to cut one but couldn't decide which way I needed to go! Obviously these keyways are not exactly 120° out, as the need to give a difference.
Timing mark are now where near!
Attachments
IMG_20180715_074340053.jpg
New keyway just before a tooth
IMG_20180715_074219687.jpg
New keyway just after a tooth

john.whiting
Holder of a Golden Anorak
Holder of a Golden Anorak
Posts: 1414
Joined: Sun May 22, 2011 2:10 pm
Location: Brisbane QLD
Contact:

Re: VALVE TIMING

Postby john.whiting » Wed Sep 04, 2019 6:42 am

J.A.P V twins have five keyways cut in the timing pinion.

nevhunter
Holder of a Golden Anorak
Holder of a Golden Anorak
Posts: 3703
Joined: Tue May 10, 2011 9:42 am
Location: Victoria.. Australia.
Contact:

Re: VALVE TIMING

Postby nevhunter » Wed Sep 04, 2019 8:43 am

And that gives a vernier effect where very small incremental adjustment is available. You can't really TRUST the marks unless they have been verified by a disc . Your cams "degrees" are achieved with a specified clearance also where the ramps are eliminated to make it easier to be precise. Nev

T.J.Falloon
Posts: 32
Joined: Thu Sep 21, 2017 1:36 pm
Contact:

Re: VALVE TIMING

Postby T.J.Falloon » Wed Sep 04, 2019 12:24 pm

Thanks for your input guys. I have been talking to one of our ariel members here in Brisbane, which has been of great assistance. I think I have my head around it, just needed confirmation.


Return to “Ariel Talk”

Who is online

Users browsing this forum: No registered users and 15 guests

cron