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2004 XB12B Engine
https://ukbeg.com/forum/viewtopic.php?f=11&t=12304		 Page 1 of 2
Author:  Graeme [ 18 Sep 2011 18:21 ]
Post subject:  2004 XB12B Engine
Help, please.

My newly acquired Firebolt's engine has destroyed itself.

I am in the market for a replacement - can anyone help? I am able to collect and am happy to negotiate to a fair price for a good one.

I can't wait to be riding it again......................here's hoping.

Graeme
Author:  gunter [ 18 Sep 2011 18:29 ]
Post subject:  Re: 2004 XB12B Engine
Can't offer an engine, but what happened to your?
Author:  Graeme [ 18 Sep 2011 19:04 ]
Post subject:  Re: 2004 XB12B Engine
Hello Gunter,

It's not entirely clear, yet. I'll tell you what I have found.

The oil pump seized and so it all stopped. On removing the timing cover I found that the exhaust Camshaft, of the rear cyclinder had fused to the in-board bush(in the crankase) and this had been turning in the casing. It looks like this had been spinning for some time - but that can only be speculation. Even in one of these engines cams are spinning at up to 3,500 RPM.

I don't think that it can't be machined for a new oversize bush, because I can't centre it, without a factory jig and the strength of the casting will be diminished by the loss of material. Interestingly enough the inlet cam bush of the front cylinderwas also found to be spinning free in the case(but in good condition) and so that one was probably on the way.

Because of this I have not stripped it futher.

Thanks for your interest and all the best,

Graeme
Author:  WILLYBUELL [ 19 Sep 2011 17:27 ]
Post subject:  Re: 2004 XB12B Engine
Graeme wrote:
Hello Gunter,

It's not entirely clear, yet. I'll tell you what I have found.

The oil pump seized and so it all stopped. On removing the timing cover I found that the exhaust Camshaft, of the rear cyclinder had fused to the in-board bush(in the crankase) and this had been turning in the casing. It looks like this had been spinning for some time - but that can only be speculation. Even in one of these engines cams are spinning at up to 3,500 RPM.

I don't think that it can't be machined for a new oversize bush, because I can't centre it, without a factory jig and the strength of the casting will be diminished by the loss of material. Interestingly enough the inlet cam bush of the front cylinderwas also found to be spinning free in the case(but in good condition) and so that one was probably on the way.

Because of this I have not stripped it futher.

Thanks for your interest and all the best,

Graeme

is it a thunderstrom engine got most of a bottom end int shed ,if no good what you doing with your dead engine :idea: wb
Author:  pash [ 19 Sep 2011 17:44 ]
Post subject:  Re: 2004 XB12B Engine
It will be a 2003 to 2007 XB engine as it is from a Firebolt
Author:  Graeme [ 19 Sep 2011 19:47 ]
Post subject:  Re: 2004 XB12B Engine
To WillyBuell,

Thank you very much indeed. It is an XB engine, which I think may be different to a Thunderstorm engine? My model knowledge is really still a bit thin, as yet. If it were the same I would definately be very interested.

I have not yet decided what to do with my own engine - I would like to keep it for now, as I may be able to part-trade it for a working one? I regret that I hesitated a couple of weeks ago and missed out on one from a member(I was on holiday.......)
I have yet to seperate the engine from from the fuel tank(the bike) & strip it but it was a sound runner in every other respect with a good gearbox/clutch etc. If I cannot trade it I will just seek to buy another engine outright and then look to strip my own and re-build it at my liesure, replacing the right hand crankcase half and any other parts that are needed(all of those bloody spinning bushes, for starters).
If I can't do that, then I will sell the good bits.

Thank you for your offer of help. :)

What a great site this is.........

Graeme

To Pash,

I have seen many of your posts and recognise your incredible knowledge - thank you for your guidance, in this matter. :yup:

PS - Profoundly share your view on Bristol

Graeme
Author:  pash [ 19 Sep 2011 22:29 ]
Post subject:  Re: 2004 XB12B Engine
The coolest thing about this thread is that everyone in is has a Firebolt.... 8-)
Author:  WILLYBUELL [ 22 Sep 2011 00:31 ]
Post subject:  Re: 2004 XB12B Engine
pash wrote:
The coolest thing about this thread is that everyone in is has a Firebolt.... 8-)

firebolts ROCK yeeeeeeeee haaaaaaaaaa wb
Author:  Nutah [ 22 Sep 2011 08:33 ]
Post subject:  Re: 2004 XB12B Engine
this is a thunderstorm engined XBR

Image




Image


this engine is the earlier type
the casing that covers the Crank Position Sensor is different ( old school points cover )

hope this helps :yup:
Author:  pash [ 22 Sep 2011 19:55 ]
Post subject:  Re: 2004 XB12B Engine
http://www.ebay.co.uk/itm/ws/eBayISAPI. ... SS:GB:1123
Author:  Graeme [ 22 Sep 2011 22:23 ]
Post subject:  Re: 2004 XB12B Engine
Pash,
:dance:
You are eagle-eyed. I now own this engine, thanks to you and the power of Master Card.........
:clap:
Thank you very much indeed.

I hope to meet you, one day and shake your hand.

Graeme
Nutah,

Thanks for the advice on early/later engines. I am filling knowledge gaps really quickly, thanks to you,
:clap: WillyBuell,

YeeeeeeeeeeeeeeHaaaaaaaaaaaaaaa

............just what I said the first time I rode the Firebolt through a sequence of twisties - and there's me an IAM man! The BMW has long gone......

8-)

I look forward to meeting you, too

Graeme

What a site this is - donation to follow.....
Author:  Adam [ 22 Sep 2011 22:31 ]
Post subject:  Re: 2004 XB12B Engine
See,............I told you this was a good place to be ;) :yup: lOl lOl
Author:  pash [ 22 Sep 2011 22:34 ]
Post subject:  Re: 2004 XB12B Engine
As this is a later engine, you will need to swap the cam case breather fitting.

Good news is that you now have the later bronze oil pump drive gear which is less susceptible to failure than the steel one on your previous engine.

Right on your doorstep too...
Author:  onanist [ 22 Sep 2011 22:50 ]
Post subject:  Re: 2004 XB12B Engine
Graeme wrote:
Pash,
:dance:
You are eagle-eyed. I now own this engine, thanks to you and the power of Master Card.........
:clap:
Thank you very much indeed.

I hope to meet you, one day and shake your hand.

Graeme
Nutah,

Thanks for the advice on early/later engines. I am filling knowledge gaps really quickly, thanks to you,
:clap: WillyBuell,

YeeeeeeeeeeeeeeHaaaaaaaaaaaaaaa

............just what I said the first time I rode the Firebolt through a sequence of twisties - and there's me an IAM man! The BMW has long gone......

8-)

I look forward to meeting you, too

Graeme

What a site this is - donation to follow.....


Good news this :sun:
Author:  Nutah [ 22 Sep 2011 22:55 ]
Post subject:  Re: 2004 XB12B Engine
pash wrote:
As this is a later engine, you will need to swap the cam case breather fitting.

Good news is that you now have the later bronze oil pump drive gear which is less susceptible to failure than the steel one on your previous engine.

Right on your doorstep too...


:yup: well done Pash :mrgreen:
good luck Graeme :yup:
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