Latest topics
» 2t Villiers Electronic Ignition etc
Yesterday at 8:34 pm by stuart elkes

» Dating certificate
Yesterday at 3:53 pm by FBOVS429

» Cruiser 39 Dynamo
Sat Oct 20, 2018 3:10 pm by kerabo

» Cruiser piston rings needed please
Tue Oct 16, 2018 10:40 am by kerabo

» WIRING HARNESS WANTED
Tue Oct 16, 2018 10:38 am by kerabo

» Stafford Show
Mon Oct 15, 2018 6:39 pm by stuart elkes

» What's this?
Sun Oct 14, 2018 8:34 pm by piston 197

» head bolts 8e
Sun Oct 14, 2018 12:55 pm by alan67

» Copdock and Scotland
Sat Oct 13, 2018 7:21 am by alan67


Falcon 58/67 - chain woes

Go down

Falcon 58/67 - chain woes

Post  keith livingstone on Wed Apr 25, 2018 10:22 pm

Hi guys
Chain woes - wear on the swinging arm!
Surely a problem many have encountered but I've never seen mentioned, or is it me? I've had my 67 on the road for 7 years and covered about 5,000 miles and in the last 2 years a model 58. After the first year or so I was shocked to see the chain had worn a significant track on the top side of the arm just above the pivot.

Have any other members had similar problems and come up with a solution?

I keep the chain well adjusted but have had to resort to fitting a small steel plate to take the wear instead. In addition I run 18t or 19t sprocket with 50t rear to raise the chain run. I thought maybe my rear shocks were too high / long but find they are the original refillable 50's units.

Any help much appreciated
Keith
avatar
keith livingstone

Posts : 62
Join date : 2012-11-25
Age : 60
Location : Northern Ireland

Back to top Go down

Re: Falcon 58/67 - chain woes

Post  Jack Clegg on Thu Apr 26, 2018 10:21 am

The 67 I restored was the same. I had the gash welded up, but took no other action. I think they are all prone to this problem.
avatar
Jack Clegg

Posts : 361
Join date : 2012-11-12
Age : 55
Location : Marlow

http://jackclegg.com

Back to top Go down

Chain tension

Post  piston 197 on Thu Apr 26, 2018 11:18 am

FB were aware of this and they had a special tool which you clamped in to the rear end in place of one shock absorber to set the chain tension with the mean position of a compressed shock absorber, it was only ever a compromise and chain wear appeared on the swing arm as the chain hit it.
On my trials based 67 i used years ago i machined a piece of black "U" shaped urethane about 1/8" thick at the bottom, with sides about 3/8" high and fixed this to the top surface of the swing arm, cured the noise of the chain hitting the swing arm , stopped the bottom chain sideplates wearing flat on the bottom edge, and acted as a chain guide.
JH
avatar
piston 197
Moderator

Posts : 4067
Join date : 2008-08-17
Location : ross-on-wye

Back to top Go down

67 chain woes

Post  keith livingstone on Thu Apr 26, 2018 9:28 pm

Hi guys
Thanks for getting back.
John, the plastic block you suggest sounds like the solution both from the noise and the wear point of view. I 'll have to see about getting one made up.

Best wishes
Keith
avatar
keith livingstone

Posts : 62
Join date : 2012-11-25
Age : 60
Location : Northern Ireland

Back to top Go down

Re: Falcon 58/67 - chain woes

Post  bill2b on Fri Apr 27, 2018 4:48 pm

Keith
This is the solution on my Plover, it was on it when I got it, Mrs B's Plover does not have this so I will make one and fit it soon. All it is is a bit of Rubber tube on a bit of steel tube with a bolt in the middle.







avatar
bill2b

Posts : 101
Join date : 2017-09-26

Back to top Go down

chain woes

Post  alan67 on Sat Apr 28, 2018 7:57 pm

Hi all  i'm sitting here reading your post and that made me think i can't remember seeing any marks on my swing arm when i was restoring it  so i have been out to the workshop and had a look [see pic ]  there are no marks top or bottom so this prob must be down to the setup with rear shocks and chain tension my bike had 17 teeth final drive and 44 teeth rear wheel, i think this is standard  ps don't judge paint work yet as swing arm has only had dust coat of black ready for final prep before top coats
avatar
alan67

Posts : 92
Join date : 2017-10-30
Age : 62
Location : lowestoft suffolk

Back to top Go down

67 chain woes

Post  keith livingstone on Fri May 04, 2018 7:29 pm

Hello guys again

Certainly having a sacrificial guide seems a pretty good bet with my bike and better if it is a plastic / low friction material.

Just one thought. Naturally enough rear shocks come in different sizes.
Mine are the old refillable type. Mounting centres appear to be 12" (305mm).
Would this be the standard size? If I had ones of say 11" then this would certainly ease the problem.

Alan your swinging arm certainly looks pretty good. What is the mounting centre distance on your 67?

Thanks guys
Keith
avatar
keith livingstone

Posts : 62
Join date : 2012-11-25
Age : 60
Location : Northern Ireland

Back to top Go down

Chain

Post  kerabo on Sat May 05, 2018 10:08 am



Not the same FB but my chain on my project bke ran so close to the trials tyre I wanted to make sure that it never touched when slack.
I should have lifted the back of the engine an inch when I fitted the 8E.
But it works well.
Remember fitting smaller sprockets can bring the chain closer to the swinging arm.
Ken
avatar
kerabo

Posts : 2444
Join date : 2008-02-11
Age : 68
Location : Falcon 87..1936 Cruiser 39. Falcon 81 Green Lane bitsa. Sunbeam S8. Honda Deuville.

Back to top Go down

chain woes

Post  alan67 on Sat May 05, 2018 2:49 pm

Hi Guys   Keith i can't tell you the distance between mountings of rear shocks as bike is still in 100 bits but i can tell you that my shocks are the old original type taking one fluid ounce of sae 20 oil i'm not sure if to much or to little oil would make any difference to ride height  my bike had 17 tooth front and 44 rear with no sign of probs on swing arm but i have now changed to 15 front and 48 rear so time will tell if iv'e messed things up.   i do like what you have done Ken holding the chain from sideways movement as well as of the swing arm i may have to copy that !   Idea  Alan
avatar
alan67

Posts : 92
Join date : 2017-10-30
Age : 62
Location : lowestoft suffolk

Back to top Go down

Re: Falcon 58/67 - chain woes

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum