Replacing disc rotors 1976 Triumph T140 Bonneville

Oct 15, 2007
2,967
4,832
Neckend or North Wales.
Funster No
635
MH
Now own a static
Exp
Since 2004
Today I fitted the front disc rotor and disc pads to my 1976 Triumph T140 just waiting for the stainless hoses which I’ve ordered to arrive. In the second picture of the new disc is my spare engine
and in the last picture are the old pads which had started to chip on the end I am changing the pads as I don’t know how old they are and looking at the old discs they could be original 1976. just the rear discs to do next.

John.
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6624864E-C133-4038-8998-7CE7142F6026.jpeg
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Sep 28, 2015
1,315
1,270
Kingston upon Hull
Funster No
38,946
MH
Hymer B544
Exp
2011 on
I like that disc but I think I’ve spent enough so far. My brake improved most by fitting a smaller master cylinder (13mm) though now I’m thinking it’d be even better with a floating disc.
As an aside, I always felt mine revved too much at 50/60mph in top with its standard 47 tooth rear sprocket, so I’ve fitted a 43 and now it does 60mph at 3100rpm. Too far, so I’ve gone for a 45 now.
 
Oct 31, 2013
658
1,036
Conwy
Funster No
28,820
MH
C class
Exp
20 years
I like that disc but I think I’ve spent enough so far. My brake improved most by fitting a smaller master cylinder (13mm) though now I’m thinking it’d be even better with a floating disc.
As an aside, I always felt mine revved too much at 50/60mph in top with its standard 47 tooth rear sprocket, so I’ve fitted a 43 and now it does 60mph at 3100rpm. Too far, so I’ve gone for a 45 now.
I know you increase the hydraulic leverage but how is it for lever travel? is there sufficient travel in reserve

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OP
Neckender
Oct 15, 2007
2,967
4,832
Neckend or North Wales.
Funster No
635
MH
Now own a static
Exp
Since 2004
I like that disc but I think I’ve spent enough so far. My brake improved most by fitting a smaller master cylinder (13mm) though now I’m thinking it’d be even better with a floating disc.
As an aside, I always felt mine revved too much at 50/60mph in top with its standard 47 tooth rear sprocket, so I’ve fitted a 43 and now it does 60mph at 3100rpm. Too far, so I’ve gone for a 45 now.
Hettie's Crew I thought mine was revving to much at 60mph so what’s it like with the 45 toothed sprocket, have you left the primary drive sprocket as standard?

John.
 
Sep 28, 2015
1,315
1,270
Kingston upon Hull
Funster No
38,946
MH
Hymer B544
Exp
2011 on
I thought mine was revving to much at 60mph so what’s it like with the 45 toothed sprocket, have you left the primary drive sprocket as standard?

John.
I’ve left the gearbox at the standard 20, you only need to change that on conical hub models. I went to a 43 after checking lots of forums but have now realised most of them are in Australia and the US, spending time on highways, I prefer country roads. I’ve only just ordered the 45 so I’ll let you know when it’s on.
 
Oct 31, 2013
658
1,036
Conwy
Funster No
28,820
MH
C class
Exp
20 years
Portland hi Derek didn’t know you were a closet biker how are you and June keeping?

John.
John, sold my bike a few years back as I had no room to store it well, still have the yearning , look at mcn often so ,who knows?
We are fine, hope Marg and you are good PM us when next up this way:giggle:

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Jan 8, 2013
5,013
6,037
Dronfield - Derbyshire
Funster No
24,202
MH
Burstner Lyseo 690G
Exp
Happy FLT since 2011
I've been fitting my new wheels this week - after buying them over two years ago ---- I know! I've been busy with new vans and kitchens :swear2:

I've used the original callipers and pads but they do seem to be rubbing a bit much - may be a quick bed in will cure it:Eeek:


IMG_20210409_110247.jpg


IMG_20210409_110212.jpg
 
Apr 9, 2018
3,485
16,152
Worcestershire
Funster No
53,271
MH
Burstner Harmony 745
Exp
March 2018
I've been fitting my new wheels this week - after buying them over two years ago ---- I know! I've been busy with new vans and kitchens :swear2:

I've used the original callipers and pads but they do seem to be rubbing a bit much - may be a quick bed in will cure it:Eeek:


View attachment 482892

View attachment 482893
You've been ragging those tyres then! :LOL: (y)

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Sep 28, 2015
1,315
1,270
Kingston upon Hull
Funster No
38,946
MH
Hymer B544
Exp
2011 on
Neckender Just been out for a 60/70 mile ride after fitting the 45 tooth sprocket. Definitely the best size and I’ll be sticking with it, 60mph at 3300rpm, feels less frantic than the standard 47 but better than the lazy, labouring 43 I’d fitted. After about 40 miles my speedo packed up, wagging crazily between 10 and 40mph when I was doing about 55/60, so another job to do.
 
OP
Neckender
Oct 15, 2007
2,967
4,832
Neckend or North Wales.
Funster No
635
MH
Now own a static
Exp
Since 2004
Thanks Hettie's Crew thats great news as I’ve also ordered a 45 tooth sprocket and it’s been delivered today, I’m at our static at the moment and it will be the first job I do when we get home.
I finished the brakes last week when I fitted new stainless steel hoses took it for a short run and the brakes were a lot better than the solid discs.
John.
 
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