Eye Bolt Huntmaster Gearbox

Singles, twins and fours.
graylee
Posts: 29
Joined: Wed Oct 10, 2018 5:42 pm
Contact:

Eye Bolt Huntmaster Gearbox

Postby graylee » Mon Sep 16, 2019 3:42 pm

Hi all,
Been going over my Cyclone which is new to me so trying to check if a few things are as they are supposed to be.

There is a nut which sits in a u-shaped lug on the frame, and is on a bolt that appears to go to the back of the gearbox, at the top.

I assume it adjusts something?
Anyway, it is loose. In fact you can swing it up out of the lug. Is this correct? What does it adjust and should it be done up tight?

I think it might be called the eye bolt??

I will attach a photo if I can.

Thanks for any help.
AOMCC Membership No. 6993
Proud owner of an Ariel Cyclone.

graylee
Posts: 29
Joined: Wed Oct 10, 2018 5:42 pm
Contact:

Re: Eye Bolt Huntmaster Gearbox

Postby graylee » Mon Sep 16, 2019 3:43 pm

IMG_2419.JPG
Picture of the Nut
AOMCC Membership No. 6993
Proud owner of an Ariel Cyclone.

graylee
Posts: 29
Joined: Wed Oct 10, 2018 5:42 pm
Contact:

Re: Eye Bolt Huntmaster Gearbox

Postby graylee » Mon Sep 16, 2019 4:57 pm

Looking through other sources it is for clutch adjustment. But should it be loose enough to just lift out of the frame lug? I guess that is what I need to know.
AOMCC Membership No. 6993
Proud owner of an Ariel Cyclone.

Mick D
Holder of a Nylon Anorak
Holder of a Nylon Anorak
Posts: 236
Joined: Tue Nov 27, 2018 2:49 pm
Contact:

Re: Eye Bolt Huntmaster Gearbox

Postby Mick D » Mon Sep 16, 2019 5:17 pm

Hi

That nut and eye bolt assembly moves the gearbox fore and aft to adjust the tension of the primary chain, make sure the secondary chain is slack during and adjusted after the primary is set.

Before adjusting the primary chain you need to slacken the gearbox to plate attachments in order that the gearbox is free to move. Once the chain tension is set and the gearbox attachments are torqued the eye bolt assembly has no function to perform, just nip it up in the tighten direction.

Regards Mick

graylee
Posts: 29
Joined: Wed Oct 10, 2018 5:42 pm
Contact:

Re: Eye Bolt Huntmaster Gearbox

Postby graylee » Mon Sep 16, 2019 5:31 pm

Hi Mick,
Thanks again! I'll just tighten it up to stop it bouncing around!
Lee
AOMCC Membership No. 6993
Proud owner of an Ariel Cyclone.

roger.fellows
Holder of a Silver Anorak
Holder of a Silver Anorak
Posts: 697
Joined: Tue Feb 21, 2012 8:32 pm
Location: S.Cumbria UK
Contact:

Re: Eye Bolt Huntmaster Gearbox

Postby roger.fellows » Thu Sep 19, 2019 9:19 am

Lee, I don't know whether you've understood Mick's post.

If that nut is loose you should check the tension of both primary and secondary chains. You could be heading for serious damage and personal danger if not.

I'm sorry, I've no idea how familiar you are with Ariels, perhaps you could get help from somebody if you are unsure about this. The nut needs to be set so that it bears the right way to maintain tensions. I can't remember which way that is without referring to somebody who knows.

Can you give us a rough idea of your location - don't be too specific?

Mick D
Holder of a Nylon Anorak
Holder of a Nylon Anorak
Posts: 236
Joined: Tue Nov 27, 2018 2:49 pm
Contact:

Re: Eye Bolt Huntmaster Gearbox

Postby Mick D » Thu Sep 19, 2019 9:45 am

Hi Roger / Lee

As I said, once the primary chain tension is set and the gearbox mounting studs tightened the adjuster has no function, the torque on the mounting studs maintains the position of the gearbox and therefore primary chain adjustment. Nipping the eye bolt nut in the tighten direction safeguards the gearbox position in that it cannot move forward in the, (unlikely), event of a loss of torque on the mounts resulting in a slack primary chain.

Regards Mick

jj.palmer
Holder of a Nylon Anorak
Holder of a Nylon Anorak
Posts: 254
Joined: Tue Oct 15, 2013 3:07 pm
Location: Denby Village, Derbyshire.
Contact:

Re: Eye Bolt Huntmaster Gearbox

Postby jj.palmer » Thu Sep 19, 2019 1:44 pm

The eye bolt and its adjusting nut act as a "adjustable mechanical stop" (as opposed to a friction stop) similar to the ones that are fitted either side of the rear wheel, all three are essential to ensuring that both drive chains maintain their correct tension.

It is therefore important that the eye bolt adjusting nut does not move out of the "U" shaped bracket, otherwise as stated, it may not only result in a slack intermediate chain but also an over tight rear chain.

I would advice that you lock the eye bolt adjusting nut into the "U" shaped bracket by some method, even a piece of wire would suffice. (I always make a locking bracket held in position by a screw.)

Hope this helps.

John P.

graylee
Posts: 29
Joined: Wed Oct 10, 2018 5:42 pm
Contact:

Re: Eye Bolt Huntmaster Gearbox

Postby graylee » Thu Sep 19, 2019 2:06 pm

Hi,
Thanks guys for the input.
I don't really know anything about old British bikes. The oldest bike I had before this was from 1981.
I am on the Suffolk/Cambridgeshire/Norfolk border.
The bike currently runs very well so I can only assume all is good at the moment, regarding the chain tensions.

As I tighten the nut to stop it being loose it works it's way out of the U-bracket, so I think I do need some way to keep it in there. I will put a bit of wire over the bolt as suggested temporarily.
I appreciate any advice and help.
Regards
Lee
AOMCC Membership No. 6993
Proud owner of an Ariel Cyclone.

Mick D
Holder of a Nylon Anorak
Holder of a Nylon Anorak
Posts: 236
Joined: Tue Nov 27, 2018 2:49 pm
Contact:

Re: Eye Bolt Huntmaster Gearbox

Postby Mick D » Thu Sep 19, 2019 2:27 pm

graylee wrote:As I tighten the nut to stop it being loose it works it's way out of the U-bracket,


Hi Lee

Yes mine does the same, I just nip it up with a ring spanner whilst applying downward pressure - it doesn't need to be tight, just nipped to remove any slack.

Regards Mick


Return to “Four stroke”

Who is online

Users browsing this forum: Google [Bot], MARK.WALSH and 60 guests

cron