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Pinion reassembly, timing side.. #791604 11/29/19 1:59 pm
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johnjorgensen Offline OP
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I am taking my A65TB apart for checking. The pinions on crank and cam were quite tight. Is there aproper way of reassembling these. I think the camshaft bearing in the primary side is a bit fragile. Any experience or advice? Cheers, John in Denmark


BSA A65 TB 1964 in barnfind condition...
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Re: Pinion reassembly, timing side.. [Re: johnjorgensen] #791607 11/29/19 2:35 pm
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MarcB Offline
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Heating the gear should increase the clearance when putting it back on. For the cam, I've never had to tap very hard to get it to go on. Just make sure you've got it lined up so as to get it on the first try.

Re: Pinion reassembly, timing side.. [Re: johnjorgensen] #791611 11/29/19 2:57 pm
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Allan Gill Offline
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On the primary side there is a spring between the timed disc and the cam, so any knocking on here will move the cam back and forth. The timing pinions can be tight, don't think I've had one yet that isn't, however I would look to remove any fash'es on the ID of the cam, I've only found one tight one and a quick clean up/polish of the pinion allowed the pinnion to be a firm but not too hard to fit or remove fit. I would also try fitting the cam pinion without the woodruff key and see if it goes on any easier! it could also be that the key isn't a) fitted properly into the cam, or b) sized properly.


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