Author Topic: Holy bushes Batman!  (Read 997 times)

Offline SixFingerJack

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Holy bushes Batman!
« on: 24.05. 2011 20:38 »
First of many queations.
I just got some new small end bushes for my '48 A7 and when I examined them, they were lacking any oil holes.
The old ones have two holes drilled in them that match up with a slot cut into the conrod. See Below.


Apart from that they are identical.
Have I got the wrong bushes?
Is it ok to drill the new ones?
Thanks in advance.
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1948 A7 Rigid

Offline muskrat

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Re: Holy bushes Batman!
« Reply #1 on: 24.05. 2011 20:55 »
G'day Jack,
               drill'em, don't leave any burrs. Freeze bush and heat rod (150 C), should just drop in.
Cheers
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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
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Offline SixFingerJack

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Re: Holy bushes Batman!
« Reply #2 on: 24.05. 2011 21:17 »
Thanks mate, will do.
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Offline muskrat

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Re: Holy bushes Batman!
« Reply #3 on: 24.05. 2011 21:54 »
Forgot to say drill after fitting to rods, a lot easier than lining up holes with a hot rod in one hand and a freezing bush in the other.
That sounds a bit kinky  *eek*.
Cheers
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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline Goldy

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Re: Holy bushes Batman!
« Reply #4 on: 24.05. 2011 22:35 »
I know cerainly on other BSA models that holes are not drilled but a slot is cut across the bush when in situ using a hacksaw or thin file.
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Offline beezalex

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Re: Holy bushes Batman!
« Reply #5 on: 27.05. 2011 16:30 »
The procedure is to press out the old bushes, press in new, drill oil holes and then ream/hone to give .001" clearance to the wrist pin.  I prefer honing but you can rig up a jig to make the holes square with a reamer.
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