Author Topic: rocker washers  (Read 1858 times)

Offline Motoanimal

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Re: rocker washers
« Reply #15 on: 26.10. 2012 06:34 »
Yeah, I think Dutch has hit the nail on the head here; from a design aspect, shimming would be the preferred method, but from a production/assembly angle, this would clearly take too long and the Thackerys  effectively remove endfloat quickly and easily. The amount of friction they add is negligible and they cope with any expasion/contaction removing any noise (I don?t remember reverse cone megas being a factory fitment Muskrat, so this may have been important!  *smile*)

I wonder what the graet Eddie Dow had to say on the subject?
Phil

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Online muskrat

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Re: rocker washers
« Reply #16 on: 26.10. 2012 09:34 »
Phil Irving recommended it. I think he knew a thing or two. ;)
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline BSA_54A10

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Re: rocker washers
« Reply #17 on: 26.10. 2012 10:12 »
The thackery washers are there simply to reduce the cost of production.
A better alternative is thrust washers spaced to have the valve adjusters sitting dead central on the valve stem.
Sounds easy till you try to do it.
We did it on a B44 a it drastically reduced the head "clatter" but we are talking around 20 hours stoning down hard washers to get them to fit
Bike Beesa
Trevor

Online RichardL

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Re: rocker washers
« Reply #18 on: 16.12. 2012 16:04 »
Just saw this on eBay. When I bought my various books the older ones were probably on close-out shelves, now they are unbelievably costly.

http://www.ebay.com/itm/1950s-1960s-BSA-A10R-A75-A65-A50-B31-B32-B40-B44-C10-C11-C12-C15-M20-M21-M33-/160923765716?pt=Motors_Manuals_Literature&hash=item2577cdcbd4&vxp=mtr

Richard L.
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Re: rocker washers
« Reply #19 on: 16.12. 2012 18:22 »
 G'day Richard. I got one of those from the states a few months back. Different seller and about $20. Now for sale at $100, any takers.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7