Bsa C15 Engine. Weak Points.?
Posted 24 January 2012 - 10:55 PM
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Posted 24 January 2012 - 11:21 PM
You need to make shure the oil pump is working OK and check that the timing side main bearing bush is free from play.If you have the head and barrel off, just also check that there is no play, (movment ). in the big end as this could be a plain bearing item. Mainly just check for wear on any components.OK
Posted 24 January 2012 - 11:25 PM
A worthwhile mod when rebuilding is to upgrade these to needle rollers. Alpha Bearings did mine when I rebuilt it and it never gave any trouble. Obviously you're not going to know the condiion of them without stripping and inspecting though. I thought mine was ok and it let go the Sunday before the Pre65 Scottish. That was a frantic few days in the shed and no mistake, including one 5am finish and one work all through the night. I finally finished it at 2pm on the Thursday, got everything packed up, bike into the van and was in Kinlochleven just in time to sign on before 9pm. Never ever want a repeat of that...
The engines perform well as a trials engine with the standard head and road cam. Road gearbox is fine with the correct primary gearing. Triumph 500 (69mm) or 650 (71mm) pistons can be used to get them out to about 275cc for a little bit more torque, not massively different but worth it if you have to rebore anyway.
Posted 25 January 2012 - 05:33 PM
Posted 26 January 2012 - 09:11 PM
Will shelve it for a while now I know it's not shot. There's a Bantam needs finishing first.
Posted 30 January 2012 - 08:15 PM
let Richard III rest in York..
Posted 16 February 2012 - 07:11 PM
I was there for another reason and spotted some c15 cases on the side....
Posted 21 February 2012 - 09:30 PM
Posted 22 February 2012 - 11:39 PM
Posted 25 February 2012 - 07:10 PM
Hi, when I was modding my B40 I found that a very usefull book to have about was Rupert Ratio. This is a guide written by a very knowledgable bloke, oddly enough not called Rupert. It's well worth having if you can find one, as it outlines mods to the motor like replacing that bushing with something more durable and getting rid of the "distributor", almost to the point of having a G spec.
I need to partly strip a 1963 Distributor C15 engine to check it over , it will be built as a std 250, as soft as possible . I am not up to speed on these only in gaining info in threads I have seen recently. Are there any weak areas to check, I am hoping to get away with top end strip for now , any thing else to check?/ It will be a long term project, just as long as the motor is sound. It kicks over with good compression, supposedly a runner a few years ago. Thanks in advance
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