Author Topic: Gearbox refurbishment  (Read 366 times)

Offline Ratchet Richard

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Gearbox refurbishment
« on: 17.07. 2021 08:40 »
I have seen some old posts recommending people that rebuild and refurbish gearboxes.  I was just wondering if anyone had up to date advice of someone in the UK that might still be doing gearbox rebuilds.  I know SRM do them but I am a bit scared of what price they would charge. 
Thanks
Richard

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Re: Gearbox refurbishment
« Reply #1 on: 17.07. 2021 09:40 »
In the forum there is a section for recommended services. I had my gearbox overhauled by Richard Clamp his details are in that section.
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Offline Ratchet Richard

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Re: Gearbox refurbishment
« Reply #2 on: 17.07. 2021 12:31 »
Thanks Greybreard
Just rang Richard Clamp.  He is still doing gearboxes at a very reasonable price.  So a trip to Nuneaton is on the cards.

Online Roger (Doomtrainbarx)

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Re: Gearbox refurbishment
« Reply #3 on: 17.07. 2021 13:19 »
Could I ask what the cost was ? I'm also looking at a gearbox refurb - thanks.
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Re: Gearbox refurbishment
« Reply #4 on: 17.07. 2021 13:21 »
Thanks Greybreard
Just rang Richard Clamp.  He is still doing gearboxes at a very reasonable price.  So a trip to Nuneaton is on the cards.
He's a super chap.
Greybeard (Neil)
1955 Golden Flash, sprung frame
Supporter of THE DISTINGUISHED GENTLEMAN'S RIDE https://www.gentlemansride.com

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A Distinguished Gentleman Riding his 1955 Plunger Golden Flash

Offline KiwiGF

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Re: Gearbox refurbishment
« Reply #5 on: 17.07. 2021 13:25 »
I have seen some old posts recommending people that rebuild and refurbish gearboxes.  I was just wondering if anyone had up to date advice of someone in the UK that might still be doing gearbox rebuilds.  I know SRM do them but I am a bit scared of what price they would charge. 
Thanks
Richard

Most people draw the line at fixing up gearboxes it appears, but IMHO they are no more difficult to fix up than an engine, probably less so.  Certainly most can dismantle, inspect, and put the box back together.
Whats “wrong” with your gearbox?
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Re: Gearbox refurbishment
« Reply #6 on: 17.07. 2021 13:43 »
I have seen some old posts recommending people that rebuild and refurbish gearboxes.  I was just wondering if anyone had up to date advice of someone in the UK that might still be doing gearbox rebuilds.  I know SRM do them but I am a bit scared of what price they would charge. 
Thanks
Richard

Most people draw the line at fixing up gearboxes it appears, but IMHO they are no more difficult to fix up than an engine, probably less so.  Certainly most can dismantle, inspect, and put the box back together.
Whats “wrong” with your gearbox?
I'm sure you are right, but, a specialist will have any replacement parts to hand and in my case a 24-hour turnaround. Richard Clamp charged an amount that I felt was very fare, (I've forgotten exactly how much).
Greybeard (Neil)
1955 Golden Flash, sprung frame
Supporter of THE DISTINGUISHED GENTLEMAN'S RIDE https://www.gentlemansride.com

Warwickshire UK


A Distinguished Gentleman Riding his 1955 Plunger Golden Flash

Offline Ratchet Richard

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Re: Gearbox refurbishment
« Reply #7 on: 17.07. 2021 14:13 »
Hi KIwiGF
The gearbox had started to clunk when changing from second to third excessively loudly.  It also clunks on all other gears but not so loud.  Took it out yesterday hoping that the fairies may have fixed it overnight but it had got worse! On investigation I noticed the gearbox had developed a nasty rattle at about a third throttle when bike was not in gear which stopped when the clutch lever was pulled in.   You are know doubt right about the ease of rebuilding the gearbox.  However I have lost some confidence in my mechanical skills just laterly and to be honest When I rang Richard Clamp he sounded like a good quick option at not to great a price.

Offline Swarfcut

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Re: Gearbox refurbishment
« Reply #8 on: 17.07. 2021 15:10 »
 Maybe a bit late now, but worth checking that the camplate plunger moves freely and has a spring that works. Plunger housing adjusted correctly, with just a couple of threads showing below the locknut as a reasonable start.   Removing the plunger housing will drain off the oil, so be prepared to catch it and inspect the oil for dirt, debris, clues etc.

 When you say "clunks" I assume you mean as you change gear, rather than a rhythmic sound when engaged which is more likely a broken, chipped or missing gear tooth. A rattle sounds like something loose or broken, investigate further before riding, possible locked box is dangerous.......

 Swarfy.

Offline Slymo

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Re: Gearbox refurbishment
« Reply #9 on: 20.07. 2021 00:09 »
Clunky changes in my experience have been clutch related. Change the gearbox oil and check for detritus but if it goes clang when you put it in first I might be tempted to check the clutch clearance.
 
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Offline paulmbsa

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Re: Gearbox refurbishment
« Reply #10 on: 31.07. 2021 17:44 »
what is a gearbox refurb is the question to ask your supplier, most only fit bushes and bearing, well this is not a refurb, i bet very few have replacement Cam plates and selectors which are the thing that will make the biggest difference

Offline Rocket Racer

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Re: Gearbox refurbishment
« Reply #11 on: 01.08. 2021 08:13 »
ignoring the kickstart ratchet gear, the most common a series gearbox problem is a worn layshaft which can be dressed and a bush made to suit. dogs wear but easily swapped out. these boxes give very little trouble and take a lot of abuse
A good rider periodically checks all nuts and bolts with a spanner to see that they are tight - Instruction Manual for BSA B series, p46, para 2.
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