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BSA A65 engine rebuild 1 Bottom end reassembly under way. Remake of recent video which froze up. 

Paul Henshaw
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The same clips as recently shared, in the same order as before, but this time, I hope they should work, rather than freeze up.
A while ago, I ran a BSA A65 with a rattly engine in the workshop and found it had a very sloppy timing side journal and bush, as well as a loose timing pinion. I stripped it for checking and repair and had to wait a while before the crank could be sorted out, with a regrind on the timing side and the big ends polished. I cleaned the sludge trap and fitted the new timing side bush - the timing side crankcase with new bush was used for sizing, to get the reground journal to within a 0.001" fit in the bush.
Here, we see some checks being made and reassembly under way.

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4 окт 2024

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Комментарии : 24   
@motorcyclementor1785
@motorcyclementor1785 13 дней назад
I had exactly the same experience when shimming- the only way is to bolt the cases together. Also I have a half dozen drive side bearings and I went through them and found that some were snugger than others and so used the one that was the best fit. Always fascinating to watch someone do this job and we can all benefit form one another. I prefer boring the timing side bush because that way you can be certain that the alignment is spot on but I did consider taking some material off the crank and might try that next time. Many thanks.
@norsehall309
@norsehall309 Год назад
G'day from Australia, Paul, l have heap of respect for a tradesmen who has as much pride in his work as you do, l do my own repairs on classic bike l own and it's because of watching you and other that l can achieve my goals, cheers mate, Neil 🤠.
@bigred8438
@bigred8438 Год назад
Excellent tutorial Paul, cheers.
@skysurferuk
@skysurferuk Год назад
45 years ago, I rebuilt my A65 Lightning. Devimead rods & pistons, & other bits. The sludge trap was a bitch to get out, & I realised what a crap design this motor is. If the sludge trap blocks up, the oil stops going to the LH big end, hence it's propensity to throw a LH rod out of the crank. I sold it, I've often wondered what happened to it. Watching you, I now realise the things I didn't do... 🤣 Very interesting content. 👍
@adammedyna2365
@adammedyna2365 Год назад
Good progress Paul.
@philmuskett265
@philmuskett265 Год назад
Mate, that's a hell of a lot of work. Well done.
@jamescook3297
@jamescook3297 6 месяцев назад
Have rebuilt two of these no problems
@paulhenshaw4514
@paulhenshaw4514 6 месяцев назад
I have rebuilt about twenty!
@iandawson7723
@iandawson7723 Год назад
Really interesting video there, thanks for making it..
@MrLukealbanese
@MrLukealbanese Год назад
Nice work Paul 😊
@hermangibbs8163
@hermangibbs8163 Год назад
Great job as always. Thanks !
@a65builder67
@a65builder67 Год назад
nice job Paul again
@roysmith4716
@roysmith4716 Год назад
Hi Paul, Why not use a micrometer to measure the crank shim? also I have used GM Loctite bearing mount on a push fit bearing like you had with excellent results.
@anthonycarty9433
@anthonycarty9433 Год назад
Your perseverance has paid dividends again , well done . As a know all know nothing ,would a paper crankcase gasket given you some extra clearance .
@paulhenshaw4514
@paulhenshaw4514 Год назад
Yes, I suppose a thin paper gasket might have worked.
@daveshegedin2576
@daveshegedin2576 Год назад
Hi Paul. I have been really enjoying your videos lately. This one reminds me very much of working on the bottom end of my 1967 Triumph Saint in the early eighties and doing similar end float investgations. One roller bearing was ruined after I had loctited it to the crank and then realised the float had gone out of spec. 🤐The checking of the centrality of the bare crank journals in the cylinder bores was also part of the deal. Also, I heard somewhere years ago that alloy being alloy the cases will "grow" as they reach operating temperature and probably increase end float slightly more. Any thoughts? I had a very cold night in Aberystwyth in 1989 in a static caravan. Those Welsh roads look great. Shame I didn't get to ride them on the TR25W, B44, R65 or Honda CB250RS that I had while living in Birmingham and then Leicestershire. Enjoyed hacking around Lutterworth on a mates A65 Hornet...lovely racket on and off the throttle! Same mates Thunderbird threw its primary chain one day and locked up the clutch basket and back wheel. Thankfully (probably caused by rolling the throttle off) when slowing down for a roundabout. That was interesting! 😲 Best wishes. God bless you and yours. Dave. New Zealand. 😊
@felixparr1378
@felixparr1378 Год назад
Hi Paul, great video would you be interested in restoring my mum's old BSA bantam engine? It ran perfectly in 1965
@paulhenshaw4514
@paulhenshaw4514 Год назад
Could do!
@felixparr1378
@felixparr1378 Год назад
@@paulhenshaw4514 I have sent you an email Paul Regards Felix
@daveharriman2756
@daveharriman2756 Год назад
Excellent work as always Paul, does the gudgeon pin still slide in the bush now its got retainer on? cheers, Dave
@marcpinion
@marcpinion Год назад
What about when it’s hot
@paulhenshaw4514
@paulhenshaw4514 Год назад
It will become looser.
@JeremyFairbairn-mv3sz
@JeremyFairbairn-mv3sz Год назад
xl might have a crack under valve seat /i had this on a b25
@paulhenshaw4514
@paulhenshaw4514 Год назад
Thanks - it is looking increasingly likely to be something like that.
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