Author Topic: Dodgy parts  (Read 1533 times)

Online morris

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Dodgy parts
« on: 21.09. 2015 23:03 »
Ticked the 500 mile since rebuild box on the plunger so thought it was about time to retorque the head.
When taking the rocker box off, to my horror I found the valve stems badly damaged by the adjusters. Paid £60 for 4 new stainless steel valves and they're already good for nothing but the scrap bin *bash* *problem*
They came from a reputable dealer together with the adjusters. Seems the stems are to soft? Or the adjusters to hard? Or something else I overlooked?
If anyone can recommend a good source for a new set of valves, I'll be happy to hear.

Also recently ordered some different size main jets for the carb at another reputable dealer.
They came in a non marked bag and the jets were stamped W****l *pull hair out*
'58 BSA A 10 SA
'52 BSA A 10 Plunger
'55 MORRIS ISIS
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Online Greybeard

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Re: Dodgy parts
« Reply #1 on: 21.09. 2015 23:11 »
I hope you are going to chase a refund

Online morris

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Re: Dodgy parts
« Reply #2 on: 21.09. 2015 23:16 »
I hope you are going to chase a refund
Will give that a try. You never know...
'58 BSA A 10 SA
'52 BSA A 10 Plunger
'55 MORRIS ISIS
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Online Greybeard

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Re: Dodgy parts
« Reply #3 on: 21.09. 2015 23:25 »
If the valves and rocker adjusters came from the same seller I can't see how they could argue about it.

Offline duTch

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Re: Dodgy parts
« Reply #4 on: 21.09. 2015 23:38 »

 I had that happen to mine a long time back, and there was a guy with a workshop across the way from guys I knew, and he tipped them with either stellite or boronium- but can't remember if they're the ones I'm currently using *conf*, but maybe worth checking into.
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
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Offline kiwipom

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Re: Dodgy parts
« Reply #5 on: 22.09. 2015 05:48 »
hi guys, Morris is it possible to get steel caps for them? cheers
A10.G.Flash(cafe racer)Honda 250 vtr. Yamaha Virago XV920.

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Offline duTch

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Re: Dodgy parts
« Reply #6 on: 22.09. 2015 07:15 »

 
Quote
is it possible to get steel caps for them

 You mean like on old single cylinder Lister stationary engines CS-3/6...??
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
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Online beezermacc

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Re: Dodgy parts
« Reply #7 on: 22.09. 2015 08:49 »
The steel caps are called 'lash caps' and they used them on A7LS. I've never had any problems with the valves I sell and I always refund on the rare occasions customers are unhappy. I have Wassell main jets in a couple of my bikes. When I've been trying to alter the main jet mixture ratio I find that the Wassell main jets function the way you would expect, i.e. fitting a bigger jet than the original Amal makes the mixture richer etc.
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Online Klaus

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Re: Dodgy parts
« Reply #8 on: 22.09. 2015 12:50 »
I trust in German engeenering an use this tappet adjuster as shown in the picture.
The power that get to valvlestem is a distributed force.
The `lashcap`is build as a bolw bounded in a ball. All the moving from the rockers are eliminated in this item.
No vertical forces at the valve guides.

It`s hard for me to explain, but I think you`ll understand.


cheers Klaus


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Online Greybeard

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Re: Dodgy parts
« Reply #9 on: 22.09. 2015 12:52 »
That looks clever. Where do you get them?

Online Klaus

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Re: Dodgy parts
« Reply #10 on: 22.09. 2015 13:15 »
That looks clever. Where do you get them?


It`s Mercedes Benz Partnumber A102 050 02 20  ask at a MB Dealer and order the nuts also

The thread is M 8 x1 but similar to  the britsh cycle thread, but it  `s easyer to fit with a metrish recut.

If the valve stem is damaged you can grind or cut  it shorter, so you have more clearence to tune.


Cheers Klaus


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Online RichardL

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Re: Dodgy parts
« Reply #11 on: 22.09. 2015 13:46 »
Like the part. Not crazy about modifying the rockers.
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Online edboy

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Re: Dodgy parts
« Reply #12 on: 22.09. 2015 20:55 »
klaus is showing off his elephant foot adjuster . triple owners use the porshe variety [expensive]also with lashcaps. another option is mushroom headed adjusters with lashcaps which i use on my triple without problems.i believe, but not possitive, the pre unit triumph used the same valve adjuster thread as the a10 but you will have to remove the rocker box to fit them.

Offline Rocket Racer

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Re: Dodgy parts
« Reply #13 on: 23.09. 2015 00:53 »
My beesa triple runs lash caps and mushroom tappets, the triples rev far beyond any twin and the triples rocker geometry is very hard on the valves.
its not uncommon for singles or twins valves to burr at the top and need a light file to remove from the guide without damaging it.
Not that they should spread or mark under low mileages.
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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Online morris

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Re: Dodgy parts
« Reply #14 on: 23.09. 2015 21:05 »
Thanks lads. Gives me a lot to think about
'58 BSA A 10 SA
'52 BSA A 10 Plunger
'55 MORRIS ISIS
The world looks better from a motorbike
Belgium