BritBike Forum logo
BritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike Sponsor SteadfastCyclesBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorHepolite PistonsBritBike SponsorBritBike Sponsor
Upgrade to: Gold Membership | Premium Membership | Vendor Membership | Site Sponsor Membership
Words from our sponsors..
Vintage Motorcycle Auctioneers!
Vintage Motorcycle Auctioneers

CLICK HERE to see VIDEO
How the Electric Roller Starter works.

ORDER on eBay. CLICK HERE!
Buy your Electric Roller Starter here
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
Tappet the Kiwi
Tappet the Kiwi
On the River, On the Road
Posts: 41
Joined: December 2009
Show All Member Profiles 
Newest Members
BarryS, Chris Robinson, wind1, Matt.B, Santacaferacer
10990 Registered Users
Top Posters(30 Days)
franko 92
DavidP 58
NickL 53
Popular Topics(Views)
1,121,761 mail-order LSR
a word from..
Forum Statistics
Forums35
Topics68,683
Posts688,812
Members10,990
Most Online14,755
May 5th, 2019
Who's Online Now
72 registered members (Adam M.), 2,064 guests, and 834 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Some hard found info.. for old guys #795446 01/12/20 4:06 pm
Joined: Aug 2001
Posts: 4,006
KC in S.B. Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
Joined: Aug 2001
Posts: 4,006
This isn't new info, but some here might waste time figuring it out themselves,............. so here's a short version. When you get to the point where pulling the clutch / brake levers is difficult, one part of that issue is this: the pivot to cable distance, mechanical advantage. ( or in this case, DIS-advantage ??) The shorter pivot distance is easier to pull, but of course cable travel is less. Came across some photos I had to document the issue......

Attached Files IMG_1922_800x600.JPGIMG_1917_800x600.JPGIMG_1920_800x600.JPG

Down to 1 BSA, 2 Triumphs, 1 '56 Chevy
1 '65 XLCH, Hernia Gift, on the way to Japan!
Support Your #1 BritBike Forum!

Check out British motorcycles for sale:
British Motorcycles on e-Bay UK
British motorcycles on e-Bay North America
CLICK HERE to see VIDEO
How the Electric Roller Starter works.


ORDER on eBay. CLICK HERE!

Buy your Electric Roller Starter here
Re: Some hard found info.. for old guys [Re: KC in S.B.] #795454 01/12/20 5:10 pm
Joined: Oct 2012
Posts: 4,779
Hillbilly bike Online Content
BritBike Forum member
Online Content
BritBike Forum member
Joined: Oct 2012
Posts: 4,779
It's my opinion that the design of the lever has more influence than the fulcrum distance...The Brembo type semi dog leg levers on my T140 have a smoother easier pull in than any stock Brit lever even though the distance is 1-1/8 ". Traditional sucks sometimes...LOL


79 T140D, 96 900M Ducati ....On a bike you can out run the demons..
Re: Some hard found info.. for old guys [Re: KC in S.B.] #795469 01/12/20 6:51 pm
Joined: Jun 2007
Posts: 6,677
HawaiianTiger Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Jun 2007
Posts: 6,677
The lever pivot distance is a critical part of the design, but with a crappy cable, it's all for nothing. Stout, non-flexing cables properly routed helps a lot. Other factors need attention, like the actual clutch. I've put a stuffer plate in my old 'Bird and it's a feather light clutch which doesn't stick overnight like it used to. It appears to me that if the spring adjusters are too tight, that is a major contributing factor to clutch sticking. And, yes, by now(I turn 70 this year) a lot of us have less strength than we used to and may have arthritis or carpal tunnel syndrome, perhaps other maladies.
Light controls means I can ride into the sunset.
I've modified two levers so far for a shorter pivot distance. Alloy levers are easiest. Plug the hole with a brass or aluminum plug and re-drill the hole.
Cheers,
Bill


Bikes
1974 Commando
1985 Honda Nighthawk 650
1957 Thunderbird/T110 "Black Tiger"
Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.
Re: Some hard found info.. for old guys [Re: HawaiianTiger] #795503 01/13/20 6:57 am
Joined: Oct 2008
Posts: 5,890
DavidP Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Oct 2008
Posts: 5,890
Originally Posted by HawaiianTiger

I've modified two levers so far for a shorter pivot distance. Alloy levers are easiest. Plug the hole with a brass or aluminum plug and re-drill the hole.

Not so easy if one wishes to increase the pivot distance to get more clutch lift.


Stepping on others doesn't make you stand tall.

71 A65L "Zelda"
92 BMW K100rs "Gustav"
72 T120V cafe project "Mr. Jim"
72 T150V "Wotan"
Re: Some hard found info.. for old guys [Re: KC in S.B.] #795512 01/13/20 11:26 am
Joined: Jan 2006
Posts: 2,070
Mike Baker Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Jan 2006
Posts: 2,070
Agree with Tony on this one. The race bike has kibblewhite springs cranked down and it is stiff with a capital S.
Dogleg levers make a huge difference for these worn out hands.

Re: Some hard found info.. for old guys [Re: Mike Baker] #795516 01/13/20 1:14 pm
Joined: May 2013
Posts: 6,141
Allan Gill Online Happy
BritBike Forum member
Online Happy
BritBike Forum member
Joined: May 2013
Posts: 6,141

Is this compared to new/good levers or old ones?

you find that the fulcrum hole wears oval, the other problem is that with the new position of the lever, the lever then rubs against the body of the "clamp". Also a lot of people use a set screw instead of a bolt/screw with shank which speeds up the wear and adds to the binding. On some I have made a small bush for the centre (for either clamp or lever depending on which is the inner most part) and this restores the smooth action.

I agree that dogleg levers often give the feel of better/smoother/lighter pull but I think this is often due to the optomised grip position.

Most aftermarket levers are over an inch fulcrum distance, the standard A65 ones for example are 7/8. even a new lever with the longer distance is heavier IME than a reasonable standard original.


beerchug
Re: Some hard found info.. for old guys [Re: Allan Gill] #795519 01/13/20 1:24 pm
Joined: Oct 2012
Posts: 4,779
Hillbilly bike Online Content
BritBike Forum member
Online Content
BritBike Forum member
Joined: Oct 2012
Posts: 4,779
Originally Posted by Allan Gill

Is this compared to new/good levers or old ones?

you find that the fulcrum hole wears oval, the other problem is that with the new position of the lever, the lever then rubs against the body of the "clamp". Also a lot of people use a set screw instead of a bolt/screw with shank which speeds up the wear and adds to the binding. On some I have made a small bush for the centre (for either clamp or lever depending on which is the inner most part) and this restores the smooth action.

I agree that dogleg levers often give the feel of better/smoother/lighter pull but I think this is often due to the optomised grip position.

Most aftermarket levers are over an inch fulcrum distance, the standard A65 ones for example are 7/8. even a new lever with the longer distance is heavier IME than a reasonable standard original.


Better than old style levers even if they are new....Yes,it's all about optomised grip which trumps the small increase fulcrum distance....My opinion; bike riding is about control and comfort and not about original style if it's not as good...


79 T140D, 96 900M Ducati ....On a bike you can out run the demons..
Re: Some hard found info.. for old guys [Re: KC in S.B.] #795523 01/13/20 2:14 pm
Joined: Oct 2006
Posts: 3,357
I
Irish Swede Offline
BritBike Forum member
Offline
BritBike Forum member
I
Joined: Oct 2006
Posts: 3,357
I have often thought that a hardened steel bush in the fulcrum hole of the clamp may be the solution .
The pivot screw might wear out, but those are easier to find and cheaper to replace than the clamp itself.

Re: Some hard found info.. for old guys [Re: Irish Swede] #795527 01/13/20 3:51 pm
Joined: May 2013
Posts: 6,141
Allan Gill Online Happy
BritBike Forum member
Online Happy
BritBike Forum member
Joined: May 2013
Posts: 6,141
Originally Posted by Irish Swede
I have often thought that a hardened steel bush in the fulcrum hole of the clamp may be the solution .
The pivot screw might wear out, but those are easier to find and cheaper to replace than the clamp itself.


I've used bronze as its easy to machine and I have some, but steel with a decent carbon content (If such exists - I wouldn't know as im not a metalurgist) would be good. The couple I have done have been a vast improvement. Although Mike and Tony's racebike probably have their clutch screwed down much more than you would on a road bike, making this even more noticable.


beerchug

Moderated by  Alan_nc 

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