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European and Other Bikes / Re: Ducati Mach 1
« on: May 17, 2012, 05:46:08 PM »
I may have a few track days, but it has been certified by the DOC and I am going to get her road registered.
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European and Other Bikes / Ducati Mach 1
« on: May 15, 2012, 06:38:44 PM »
Its been a while since I posted on here, but I have been busy with one thing or another. I have attached a couple of pictures of my latest project a 1965 Ducati Mach 1 which the previous owner told me was a Vic Camp racer, I think it was more in the style of Vic Camp's, but anyway here is one before work started and one to date. I have a bit more to do, but she is coming along nicely.
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Autojumble / WANTED BSA C15 Alpha bearing
« on: August 14, 2011, 09:52:05 AM »
Hi everyone, I am after a Alpha bearing for my 1960 BSA C15. I have an Alpha con rod fitted to my crank, but the bearing is very notchy 
. Can you help please?
Thanks, Dave.
. Can you help please?Thanks, Dave.
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British Bikes / Re: Please Help C15
« on: August 07, 2011, 04:24:47 PM »
Thank you Goldy for your guidance 
it is much appreciated.
it is much appreciated.
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British Bikes / Please Help C15
« on: August 07, 2011, 10:52:35 AM »
Hi everyone.
It’s been a while since I last posted on here. I have finally got around to splitting my 1960 c15 engine and have found that the conrod bearing is very notchy, so will need to be replaced. I have been reading my Rupert Ratio book and I am a little confused.
I am presuming the bearing that is in my crank at the moment would be the plain bush and on this presumption I want to fit a roller bearing instead. My question is can I purchase a bearing to go straight into my conrod and if so which one would I need or would I need to replace the rod also? If the latter is the case what work if any would need to be done to the cranks?
I have mentioned this in a previous post, but will ask again. I replaced my barrel and piston for a better one as mine had broken fins, but the one I was able to get hold of was an SS80 piston and barrel. My question is having read my book and the SS80 being of higher compression, would I need to change the spec of the bike i.e. head with bigger valves, carb jets , valve timing etc to compensate for the higher compression ?
Sorry to ask so many questions, but I just want to make sure what I am doing will be done once and correctly. Thanks in advance.
It’s been a while since I last posted on here. I have finally got around to splitting my 1960 c15 engine and have found that the conrod bearing is very notchy, so will need to be replaced. I have been reading my Rupert Ratio book and I am a little confused.
I am presuming the bearing that is in my crank at the moment would be the plain bush and on this presumption I want to fit a roller bearing instead. My question is can I purchase a bearing to go straight into my conrod and if so which one would I need or would I need to replace the rod also? If the latter is the case what work if any would need to be done to the cranks?
I have mentioned this in a previous post, but will ask again. I replaced my barrel and piston for a better one as mine had broken fins, but the one I was able to get hold of was an SS80 piston and barrel. My question is having read my book and the SS80 being of higher compression, would I need to change the spec of the bike i.e. head with bigger valves, carb jets , valve timing etc to compensate for the higher compression ?
Sorry to ask so many questions, but I just want to make sure what I am doing will be done once and correctly. Thanks in advance.
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British Bikes / Re: BSA C15 piston swop
« on: August 16, 2010, 10:35:12 AM »I think that you will find that it fits ok but the thing that would concern me would be the higher compression ratio. The weakest part of the 1960 C15 is the big end if its the original small diameter you might have problems.
Thanks for this. I am about to split the the engine, what would be recomended to install for the big end? Should I just look at a upgrade?
Thanks.
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British Bikes / BSA C15 piston swop
« on: August 14, 2010, 04:15:58 PM »
Hi everyone, can someone advise please.
I am in the process of restoring my C15 1960 and didn’t want to put the existing head on as there was a few fins broken. I have got my hands on another piston and matching barrel from a chap, the only thing is it is a SS80 piston with marks 30.4764 and 40-642 BSA 1mm OS. The chap tells me I can put it straight on no issues. Can someone please reassure me this is the case as I am a little apprehensive and need some reassuring. I have gone through my Rupert ratio's book and it does mention 40-642 as a +040 with a Comp. ratio of 8.75:1. The other issue I have is there are no defining marks telling me which is the front as fitted.
Thanks Dave.
I am in the process of restoring my C15 1960 and didn’t want to put the existing head on as there was a few fins broken. I have got my hands on another piston and matching barrel from a chap, the only thing is it is a SS80 piston with marks 30.4764 and 40-642 BSA 1mm OS. The chap tells me I can put it straight on no issues. Can someone please reassure me this is the case as I am a little apprehensive and need some reassuring. I have gone through my Rupert ratio's book and it does mention 40-642 as a +040 with a Comp. ratio of 8.75:1. The other issue I have is there are no defining marks telling me which is the front as fitted.
Thanks Dave.
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British Bikes / Re: C15 oversized piston
« on: April 27, 2010, 01:12:01 PM »
Thanks Leon, I am sending it off to Langcourts, who are going to rebore it to +0.060 and blast the fins ready for repaint for £50.00 for me. Thanks for the advice once again.
Anyone have a +0.060 piston hanging around that they want to sell? Give me a shout.
Anyone have a +0.060 piston hanging around that they want to sell? Give me a shout.
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British Bikes / C15 oversized piston
« on: April 23, 2010, 08:44:27 PM »
Can anyone advise please? I have bought a second hand barrel for my C15 and I was told by the chap I purchased it from that it was a +0.020. upon measuring the diameter it would not be a plus +0.020 it is in fact in between +0.040 +0.060, which would be the maximum that you could get a C15 piston unless you went up to 69mm and then I understand that I could fit a T100 piston which I believe was common practise at one point.
To fit a +0.040 piston the diameter would need to be 2.677 or to fit a +0.060 piston the diameter would need to be 2.697. The actual diameter I have within my barrel is 2.691. Would I need to get a rebore on it to bring it up to the +0.060 or could I just fit a +0.040 as the rings would take up the difference. Hope this makes sense.
Dave
To fit a +0.040 piston the diameter would need to be 2.677 or to fit a +0.060 piston the diameter would need to be 2.697. The actual diameter I have within my barrel is 2.691. Would I need to get a rebore on it to bring it up to the +0.060 or could I just fit a +0.040 as the rings would take up the difference. Hope this makes sense.
Dave
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British Bikes / C15 Primary Drive Tensioner Advise
« on: April 02, 2010, 07:07:28 AM »
Hi, upon stripping my C15 engine, I noticed the primary drive tensioner was missing. 
My question is; would there be a reason for this
or is it someone has had the engine apart before and not bothered putting it back in? I have managed to get hold of one; 
good old ebay. but would I be right putting it in once I start to rebuild it.
She is a dizzy type from 1960. Thanks.
My question is; would there be a reason for this
or is it someone has had the engine apart before and not bothered putting it back in? I have managed to get hold of one; good old ebay. but would I be right putting it in once I start to rebuild it.She is a dizzy type from 1960. Thanks.
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Autojumble / Wanted
« on: March 30, 2010, 01:13:04 PM »
Hi can anyone help please. I am after a C15 barrel which is in good order. I am rebuilding my C15 and I have a broken fin 
and I don't want to refit it in the state its in.
Thanks, Dave.
and I don't want to refit it in the state its in.Thanks, Dave.
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British Bikes / Re: BSA B31 Carb Problem - Please Help!!
« on: March 25, 2010, 08:46:44 AM »
Hi
I have attached a link for you to look at, hope it helps.
http://www.amr-of-tucson.com/carb_facts.html
Dave.
I have attached a link for you to look at, hope it helps.
http://www.amr-of-tucson.com/carb_facts.html
Dave.
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British Bikes / Re: C15 wheel build
« on: March 23, 2010, 06:58:14 PM »
Thanks for that, I am going to have a go at it myself, see how I get on. 
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British Bikes / Re: DOES THIS REALLY WORK????
« on: March 23, 2010, 06:55:26 PM »
I seen a very similar thing on eBay myself, I would have some scepticism myself although I am no expert.
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British Bikes / Re: C15 wheel build
« on: March 22, 2010, 09:29:13 PM »
Thanks Leon, I don't possess the book you mentioned, but I will have a look for it and acquire.
You would seem like a talented man who knows his stuff indeed; I will give it a go and let you know how I get on, once again thanks.
You would seem like a talented man who knows his stuff indeed; I will give it a go and let you know how I get on, once again thanks.
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