Ariel Colt advance/ retard unit needed

Mickypic
Posts: 71
Joined: Mon Dec 10, 2012 8:11 pm
Contact:

Ariel Colt advance/ retard unit needed

Postby Mickypic » Mon Jan 04, 2016 6:13 pm

Bought a 1957 Ariel Colt basket case which the previous owner had dismantled the engine and it looks like he had tried to remove the timing advance / retard unit with a hammer . :shock: There is a few bits of the unit left , the two weights, springs, one circlip and cam. Has anyone got a spare unit or remains of one to make a complete one up from the bits I have left. Ariel item number 02097 , I think this unit was also used on some BSA model C eg C10L
Any help appreciated
Michael
Attachments
image.jpeg
image.jpeg

User avatar
Paul_Linden
Holder of a Waxed Cotton Anorak
Holder of a Waxed Cotton Anorak
Posts: 509
Joined: Sat Oct 15, 2011 10:08 pm
Location: Exeter, UK
Contact:

Re: Ariel Colt advance/ retard unit needed

Postby Paul_Linden » Thu Jan 07, 2016 11:14 pm

You're in luck, one has come up on ebay
http://www.ebay.co.uk/itm/BSA-C11G-C12- ... SwZG9WjnOh
Ariel Square 4 mk2, Ariel Square 4 mk3 (yes, really), Ariel Colt, Matchless G12, BSA C12. Room for one more......

Mickypic
Posts: 71
Joined: Mon Dec 10, 2012 8:11 pm
Contact:

Re: Ariel Colt advance/ retard unit needed

Postby Mickypic » Fri Jan 08, 2016 3:43 pm

Will it fit ?
Pictures of one I found on Internet has same shape, weights and taper fit but the one on eBay now for bsa c12 looks
a different shape, but I am no expert.
Attachments
image.png
image.png

User avatar
Paul_Linden
Holder of a Waxed Cotton Anorak
Holder of a Waxed Cotton Anorak
Posts: 509
Joined: Sat Oct 15, 2011 10:08 pm
Location: Exeter, UK
Contact:

Re: Ariel Colt advance/ retard unit needed

Postby Paul_Linden » Fri Jan 08, 2016 5:17 pm

I'm 99.9% sure that the one for sale on ebay will fit a Colt, and provide the correct timing advance, although it might be of a different type of construction to the one on your colt - so parts would not be interchangeable between the two.
The seller obviously hasnt been able to take the advance retard unit off the cam, which is why he's selling it all as one lump. you need a certain size threaded bar to take the unit off.
The good news is that the cam is the later ramped type which is the better one to use.
Sometimes i buy things on spec and if they dont fit i sell them on again, the only loss is the postage. :)
Ariel Square 4 mk2, Ariel Square 4 mk3 (yes, really), Ariel Colt, Matchless G12, BSA C12. Room for one more......

Mickypic
Posts: 71
Joined: Mon Dec 10, 2012 8:11 pm
Contact:

Re: Ariel Colt advance/ retard unit needed

Postby Mickypic » Fri Jan 08, 2016 7:33 pm

Ok Paul
Will have a bid and hope it fits, if not will send you the bill :lol:
Thanks for your help.
Cheers Michael

Mickypic
Posts: 71
Joined: Mon Dec 10, 2012 8:11 pm
Contact:

Re: Ariel Colt advance/ retard unit needed

Postby Mickypic » Wed Jan 20, 2016 3:38 pm

Won the eBay auction and package arrived today. As you can see from picture the unit has the same tapper and seems to fit cam ok. Had a job trying to remove from old cam, there is no way I could find of pulling unit off cam ,no thread in centre hole for large bolt to use as extractor, so had to tap loose centre bolt to knock cam off ( hoping not to damage advance unit ).
Does anyone know the proper way to remove unit ?
Cheers Michael
Attachments
image.jpeg

User avatar
Paul_Linden
Holder of a Waxed Cotton Anorak
Holder of a Waxed Cotton Anorak
Posts: 509
Joined: Sat Oct 15, 2011 10:08 pm
Location: Exeter, UK
Contact:

Re: Ariel Colt advance/ retard unit needed

Postby Paul_Linden » Sat Jan 23, 2016 10:36 am

Have a look at this web page (on another site) it's a detailed description of how to strip a BSA C12 engine, so it is great for a Colt as well because they are similar. About a third of the way down is the info on the tool for parting the advance retard unit from the cam.
http://bsac10c11c12.co.uk/smf/index.php ... 4#msg53774
Have fun! :-)
Ariel Square 4 mk2, Ariel Square 4 mk3 (yes, really), Ariel Colt, Matchless G12, BSA C12. Room for one more......

Mickypic
Posts: 71
Joined: Mon Dec 10, 2012 8:11 pm
Contact:

Re: Ariel Colt advance/ retard unit needed

Postby Mickypic » Sat Jan 23, 2016 7:54 pm

This would not work on my unit, the middle hole is totally smooth with no threaded section to screw a bolt into.
Cheers Michael

User avatar
Roger Gwynn
Posts: 41
Joined: Tue May 28, 2013 11:34 am
Location: Norwich, UK
Contact:

Re: Ariel Colt advance/ retard unit needed

Postby Roger Gwynn » Sun Jan 24, 2016 8:45 pm

See page 15 of the Owner's Guide for method of extraction.
The Colt used Wipac equipment, the C11G and C12 used Lucas so the units are not the same. I think you will find that the depth of the housing is different. The Colt one is however the same as a C10L as you suspected

Roger
Worldwide Membership Secretary
Semi-retired partner in Draganfly Motor Cycles


Return to “For sale/wanted - Parts”

Who is online

Users browsing this forum: No registered users and 8 guests