Speaking of vibration

[trevinoz]

Dave,
            It looks like someone has put A7 rods in your engine. Or an A7 crank.
Maybe you need to have a quiet conversation with the bloke who sold you the bike.
Preferably with a big stick in your fist.
Trev.

Surprising that it ran at all.
A mate bought a Flash years ago with the same. He couldn't get it to start.

[trevinoz]

Dave,
             The rod number you quoted would be 67-270 which is an A10 small journal rod.
Seems like you definitely have an A7 crank.
Get that big waddy and have that conversation!
Trev.

[chaterlea25]

HI Dave,
Buggershitnf**k  
What a shedfull of bad luck ????
All this will now render the balancing you had done to nought
Better luck for 2011

Regards
John O R

[Hubie]

Hi all,

It does seem that I have got an A7 crankshaft.  Rebalanced to 65% and new big ends all ready to go.  I wonder if someone here needs one?  Now I have to find an a10 crank!

[muskrat]

G'day Dave,
                   sounds like you were the first mouse. Bugga.
So was that the original crank in it since you have had the bike ? The balance would be out the window if done with A10 rods & pistons.
Look for a LJ crank & rods. 230561776736 & 170563799964 I'd love a set of those rods or these http://www.mapcycle.com/ProductDesc.aspx?code=MAP7078/A&type=0&eq=&desc=CONROD%2f-A10-%28LATE%29-6.5--EXTRUDED%2fBILLET&key=it
I picked up a crank & rods not long back as I plan on punching the '51 up to 650. I'm not sure but I might have a SJ crank somewhere, will look on weekend.
Cheers

[Hubie]

Thanks Musky.  As long as there's a proper sized crank out there for me somewhere I'll be overjoyed!  I should at least get a couple of dollars for the one that I have too as apparently a7 cranks are even harder to find.  I shall await further responses.  It is the same crank since I bought the bike. Buggered if I know how it ran at all.

Cheers,
Dave.

[nigeldtr]

How about popping some a7 barrels on - is this possible? seems you have such a nice bottom end now. Really sorry to hear this story my goodness I am amased you are still with us - I would have probably topped myself.

I bought a similar pack of lies and have spent the last year trying to replace the junk that was put inside the casings!

PS you must be onto a winner luck wise, as this was enough to last 2 life times.

Keep at it, you will get there!!

Regards

Nigel

[trevinoz]

Nigel,
            Even fitting A7 barrels will not fix this mess as the rods are too long and the pistons too fat.

Trev.

[Hubie]

Thanks Chaps,

I have really felt like i've been given a kick in the guts by mr murphy but there is no point just parking it and doing nothing.  I want a working bike and I know how good it will be once it is done.  I've spoken with the president of the BSA owners club down here in Victoria and he's been nice enough to see what he can do.  Also the excellent engineer who did the crank work, Brian Dyson is heading over the Adelaide after christmas and is stopping in on a friend who runs a bike shop there who has stacks of BSA stuff and might be able to work out some sort of swap involving my new crank.  Muskrat is being kind enough to look for a crank this weekend in his shed and there is a BJ crank in the US on ebay at the moment (hands off!) that I have my eyes on.  Then I have to source rods as well.

The problem is easily fixed but very expensive so I am going to have to save my pennies for a while.  On a more positive note, I got my Super Meteor (blasphemy I know!) up and running last night and it is ready to bed the rings in and looks grand.

Thanks for all your advice and support chaps - I may have given up by now without it!

Cheers,
Dave.

[nigeldtr]

Hello Dave,

There is a chap here in Germany with a lot of A10 bits, if nothing turns up let me know and I will see if he has got something suitable.

PS as the first buy was a bag of **** I decided to by a working 61 A10 and guess what - its next in the workshop!

Good luck

Nigel

[Hubie]

G'day all,

My present from Terry Kennedy arrived in the mail yesterday (Thanks Terry!).  I now have an excellent quality LJ crank, NOS rods, nuts, bolts and washers plus a better oil pump than the one I had.  Just have to save up for the top end stuff (valves and guides) and a few other odds and ends and the old girl will live again.

Cheers,
Dave.

[terryk]

Good on ya Dave

[Hubie]

Well I have finally dropped off my new crankshaft for regrinding and balancing.  The timing side shaft is on -10 and perfectly round so it stays as is, the big end journals are on standard but a tiny bit out of round so I am going to minus 10.  Slowly, it's all starting to come together and I still have my SJ crank for sale (A7) if anyone is interested.

Cheers,

Hubie

[Hubie]

Cases are back together now so the motor can go into the frame.  Waiting on some odds and ends to arrive from Draganfly and then the whole thing can be completed.  Going to a 21 tooth sprocket.  Really must thank Terry K for the crank.  The driving and timing side shafts look so good you could be forgiven for thinking they've never been used!

It's all slowly coming together now.  Just need a buyer for my very early short stroke A7 crank!

[trevinoz]

Hubie,
                Why don't you build an A7 around the crank?


    Trev.