Author Topic: Speaking of vibration  (Read 13754 times)

Offline muskrat

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Re: Speaking of vibration
« Reply #15 on: 10.09. 2010 22:37 »
Good one Dave, should be sweet at highway speeds.
Don't rush it. Do it right, do it once.
Cheers
'51 A7 plunger, '57 A7SS now A10CR, '76 XT500, '77 AG175 '83 CB1100F, '81 CB900F project.
Australia
Muskys Plunger A7

Offline a10gf

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Re: Speaking of vibration
« Reply #16 on: 10.09. 2010 23:05 »
MG, http://www.a7a10.net/forum/index.php/topic,2926.msg19719.html#msg19719
 *lol*

muskrat >
Quote
Don't rush it. Do it right, do it once.
good advice indeed, for lot's of things in life...



A10 GF '53 My A10 website
"Success only gets you a ticket to a much more difficult task"

Offline Hubie

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Re: Speaking of vibration
« Reply #17 on: 11.09. 2010 15:45 »
I shall be doing it very carefully, with a micrometer and a maginfying glass!!!!
1959 BSA Golden Flash
1956 Royal Enfield Super Meteor
1955 Royal Enfield 350 Bullet
2007 Harley Davidson Sportster 1200 Custom

The early bird gets the worm, but the second mouse get's the cheese!

Offline Hubie

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Re: Speaking of vibration
« Reply #18 on: 15.09. 2010 03:30 »
Well I dropped the crank off at Dyson Motorcycle Engineering.  The crank is going to be stripped, the sludge trap cleaned out and the bearing shells will also be checked before everything is rebalanced.  I am very confident the man know's what he's doing.  He immediately informed me that my pistons are not at all standard and that is would largely be the reason for the lack of a correct balance factor.

He says they are high quality italian jobs (numbered 71.5 on top from memory) and will obviously weigh them when doing the work.  Am very much looking forward to hearing the results.

Cheers

Hubie
1959 BSA Golden Flash
1956 Royal Enfield Super Meteor
1955 Royal Enfield 350 Bullet
2007 Harley Davidson Sportster 1200 Custom

The early bird gets the worm, but the second mouse get's the cheese!

Offline Hubie

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Re: Speaking of vibration
« Reply #19 on: 16.09. 2010 05:59 »
It turns out my camshaft is a little worn so I am facing a regrind or perhaps a new one.  My question is, can I get a regrind and not lose the peak on the cam lobes or do I buy a new one and will a road rocket cam fit in place of the original one?

Cheers

Hubie
1959 BSA Golden Flash
1956 Royal Enfield Super Meteor
1955 Royal Enfield 350 Bullet
2007 Harley Davidson Sportster 1200 Custom

The early bird gets the worm, but the second mouse get's the cheese!

Offline muskrat

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Re: Speaking of vibration
« Reply #20 on: 16.09. 2010 06:28 »
G'day Dave,
                   when they regrind cams they grind the base circle as well to give you your original timing and lift. As long as they don't have to take more than 30 thou off the base it should be ok. If they take more your followers may not drop far enough to reach the cam. It also alters the angle that your rockers meet the valves, so if it goes too far longer push rods are needed to get the angle back. Been there done that.
You would best be served with a 356 cam if it's your daily ride. A 357 or 334 will fit.
How are the followers? If the cam is worn they will be as well. You'd be looking at about $300AU to put new ones in (cam & followers).
Cheers
'51 A7 plunger, '57 A7SS now A10CR, '76 XT500, '77 AG175 '83 CB1100F, '81 CB900F project.
Australia
Muskys Plunger A7

Offline Hubie

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Re: Speaking of vibration
« Reply #21 on: 16.09. 2010 07:48 »
Thanks mate,

Looks like I will get away with a regrind and a small cleanup of the followers.  Taking the camshaft to a shop tomorrow to be checked out and then just waiting on the gasket set and the rebalance.

Cheers

Hubie
1959 BSA Golden Flash
1956 Royal Enfield Super Meteor
1955 Royal Enfield 350 Bullet
2007 Harley Davidson Sportster 1200 Custom

The early bird gets the worm, but the second mouse get's the cheese!

Offline Hubie

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Re: Speaking of vibration
« Reply #22 on: 16.09. 2010 08:45 »
A quick question too, the central pin that holds the inside cam followers in, is it a bash it out scenario or is there another way to get them out?

Cheers,

Dave.
1959 BSA Golden Flash
1956 Royal Enfield Super Meteor
1955 Royal Enfield 350 Bullet
2007 Harley Davidson Sportster 1200 Custom

The early bird gets the worm, but the second mouse get's the cheese!

Offline alanp

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Re: Speaking of vibration
« Reply #23 on: 16.09. 2010 09:26 »
There's a screw with a 3/16" dia ball at the bottom of the tapped hole holding it in place which you will have to remove first, then tap it gently out.
Member of the 'Last of the Summer Wine Club - Jennycliff'.

Offline Hubie

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Re: Speaking of vibration
« Reply #24 on: 16.09. 2010 10:12 »
I cant see where this screw is.  I've taken the ones out from the side but the pin in the centre is blank so to speak, nowhere to get purchase on it except to knock it out.
1959 BSA Golden Flash
1956 Royal Enfield Super Meteor
1955 Royal Enfield 350 Bullet
2007 Harley Davidson Sportster 1200 Custom

The early bird gets the worm, but the second mouse get's the cheese!

Online bsa-bill

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Re: Speaking of vibration
« Reply #25 on: 16.09. 2010 10:33 »
it's on the top of the barrel flange, sometimes hard to see with layers of cylinder black coating it
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Offline Hubie

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Re: Speaking of vibration
« Reply #26 on: 16.09. 2010 10:34 »
Found it lads!  Alot of paint was covering it.  Popped out no problems.

Cheers,

Dave.
1959 BSA Golden Flash
1956 Royal Enfield Super Meteor
1955 Royal Enfield 350 Bullet
2007 Harley Davidson Sportster 1200 Custom

The early bird gets the worm, but the second mouse get's the cheese!

Offline Hubie

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Re: Speaking of vibration
« Reply #27 on: 16.09. 2010 10:54 »
Yet another question to pose,

I'm taking the camshaft in to a cam place tomorrow.  The man says he has a bsa camshaft for a twin but will need to compare it with mine to make sure it's for the A10.  Would I be correct to assume that the cam profiles for the a10 and a65 are the same? Have just learned the cam is a 67-356.

Cheers,

Dave.
1959 BSA Golden Flash
1956 Royal Enfield Super Meteor
1955 Royal Enfield 350 Bullet
2007 Harley Davidson Sportster 1200 Custom

The early bird gets the worm, but the second mouse get's the cheese!

Offline trevinoz

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Re: Speaking of vibration
« Reply #28 on: 17.09. 2010 00:46 »
Dave,
            The early A65 had a mildish cam but from about 1964, I think, they were all fitted with the spitfire grind which is the same as the 357.
The A65 cam will not fit the A10 and vice versa.
If I had enough 357 cams I would fit them in everything I own!
Trev.

Offline Hubie

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Re: Speaking of vibration
« Reply #29 on: 17.09. 2010 01:44 »
Thanks Trev,

Do you happen to have the values for the 357 grind?  I have heaps of meat on my camshaft so if I can grind it to that, I will!
1959 BSA Golden Flash
1956 Royal Enfield Super Meteor
1955 Royal Enfield 350 Bullet
2007 Harley Davidson Sportster 1200 Custom

The early bird gets the worm, but the second mouse get's the cheese!