Author Topic: End float A7  (Read 729 times)

Offline BSA500

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End float A7
« on: 28.08. 2021 18:16 »
Not new to this just to state. Got the float down to 1 thou, tightened down the shock absorber and still fine. Bolted lots of bits on including barrels and had a quick check 9 thou, WTF.
 Just venting I'm sure I will get back to it tomorrow

1960 A7 (57 motor to SS spec)

Offline muskrat

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Re: End float A7
« Reply #1 on: 28.08. 2021 21:01 »
G'day BSA500.
 *????* something not quite right there  *ex*
The only thing I can think of s the drive side outer bearing wasn't home properly or 100% square. Then with turning the crank over a few times it's moved into position. That then indicates the fit in the case is suspect.
Better to find now than later.
Cheers
'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7

Offline BSA500

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Re: End float A7
« Reply #2 on: 28.08. 2021 22:57 »
Well got to go back inside so I will check that

1960 A7 (57 motor to SS spec)

Offline HappyBiker

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Re: End float A7
« Reply #3 on: 03.04. 2022 17:47 »
A friend told me to place/secure the timing-side crankcase facing upwards then drop the crankshaft into the bush, then you can position the shims centrally and carefully lower the drive-side half of the crankcase so that there is no sideways shim movement. If the shims move off-centre they can be trapped giving the appearance of zero end-float.
1952 Gold Flash, 1957 + 1954 Shooting Stars

Offline Swarfcut

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Re: End float A7
« Reply #4 on: 03.04. 2022 20:22 »
Goodness knows how this thread resurfaced, it started almost 9 months ago.

  Friend? I think not. It's easier to place the crank timing side uppermost, then carefully lower the case with the timing bush in line with the crank journal. This is because with the suggested way the crank obscures the hole you're aiming for, and there is a good chance of gouging a chunk from the bush. Turn the whole thing over to complete assembly. From the post the shims are being considered as thrust washers?...On a late ('66) A65 well maybe, but not on an A10. Shims go between the crank and inner race of the drive side roller bearing.

 How did things pan out from the original post?

 Swarfy.

Offline BSA500

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Re: End float A7
« Reply #5 on: 04.04. 2022 12:32 »
Holy thread resurrection Batman. Yes everything is good all sorted just getting ready for this summer now sporting straight through hornet pipes *smile*

1960 A7 (57 motor to SS spec)

Online Colsbeeza

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Re: End float A7
« Reply #6 on: 06.04. 2022 12:45 »
BSA, Did you find the cause?
Col
1961 Golden Flash
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Offline BSA500

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Re: End float A7
« Reply #7 on: 06.04. 2022 15:41 »
The bearing hadn't quite settled into the case, a bit more heat etc sorted it

1960 A7 (57 motor to SS spec)