Author Topic: Mainshaft gear separate from main shaft A10  (Read 1677 times)

Offline peter

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Mainshaft gear separate from main shaft A10
« on: 05.07. 2017 19:51 »
On my Goldflash 1954 swingarm the transmission has a defect, for this reason I have to separate the main shaft gear No. 67-3191 from the mainshaft No. 67-3330. How to do this without the locating ring No.67-3101 to destroy? Is the gear pressed onto the shaft?
The main shaft is crooked too so I must have a new one, knows one where I get one ?
Best thanks in advance for your help.
Peter

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Online JulianS

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Re: Mainshaft gear separate from main shaft A10
« Reply #1 on: 05.07. 2017 20:15 »
Support the pinion then press the shaft through it from the short end. 67 3101 should not be damaged doing this.

The pinion can be very tight. You may be able do it using a copper mallet to drive shaft through or if very tight you may need to use a hydraulic press  to pop it off. Using a press it will probably release with a bang.

New mainshafts are available from the better dealers. You often see used ones on ebay. Dont use one from an RRT2 Gold Star box, it will not fit the sleeve gear.
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Offline duTch

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Re: Mainshaft gear separate from main shaft A10
« Reply #2 on: 05.07. 2017 23:04 »

 I had success by sliding the shaft down a length of pipe with a washer big enough to protect the dogs, had some kind of fastener with a big enough head and  a washer to protect the shaft end(with nut on), used a 10Lb hammer on a lump of hardwood to drift it. The pipe was a bit long, so stuffed some rag up the bottom to cushion it if/when it popped off- seemed to go easy enough

 Much the same concept in reverse to add the replacement
 
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Offline kiwipom

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Re: Mainshaft gear separate from main shaft A10
« Reply #3 on: 05.07. 2017 23:59 »
hi Dutch, nice bit of bush mechanics, well done, cheers
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Offline duTch

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Re: Mainshaft gear separate from main shaft A10
« Reply #4 on: 06.07. 2017 03:56 »

 Thanks KP- I won't let it go to my head though as I'd be surprised if it's not a well used method, just went through the detail for anyone who hadn't done it *conf*
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Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline peter

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Re: Mainshaft gear separate from main shaft A10
« Reply #5 on: 06.07. 2017 13:55 »
Support the pinion then press the shaft through it from the short end. 67 3101 should not be damaged doing this.

The pinion can be very tight. You may be able do it using a copper mallet to drive shaft through or if very tight you may need to use a hydraulic press  to pop it off. Using a press it will probably release with a bang.

New mainshafts are available from the better dealers. You often see used ones on ebay. Dont use one from an RRT2 Gold Star box, it will not fit the sleeve gear.

Hello Julians,
I have a 50 To hydraulic Press so i will have now problem with your metode.
I was looking for a new axle in Ebay but there it had just crumbled ones.
Do you know the name of a good trader who sells new ones?
Best regards Peter

Hi duTch,
your method is also to make, but I have a press, thanks vor your advice.


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1956 Royal Enfield Bullet 350
1956 AJS 18s
1949 Royal Enfield 500 J2
1954 Golden Flash 650
1985 Virago V1000
2001 Wildstar V1600
1966 Velosolex 50
1999 Virago XV 1100
2012 Kawasaki W800
2016 KTM Duke 390

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Re: Mainshaft gear separate from main shaft A10
« Reply #6 on: 06.07. 2017 14:17 »
Draganfly Motorcycles are listing them at about £140.

https://www.draganfly.co.uk/index.php/accessories-a-misc/product/14349-

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Offline Topdad

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Re: Mainshaft gear separate from main shaft A10
« Reply #7 on: 06.07. 2017 14:43 »
I bought a new one from *********  some yrs ago and from that experience ,incidentally I've just set it aside for the second time due to it being incorrect size after being supposedly resized  , I'd check every measurement  prior to fitting ,twice !!
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Online JulianS

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Re: Mainshaft gear separate from main shaft A10
« Reply #8 on: 06.07. 2017 15:27 »
What is the damage to your mainshaft? Usually quite robust. Some damage around the keyway is also usual but unless severe the ahft remains usable. The pinion 67 3191 is often worn causing jumping out of third gear.
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Offline Topdad

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Re: Mainshaft gear separate from main shaft A10
« Reply #9 on: 06.07. 2017 16:26 »
Julian, is that directed to me or Peter ?
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Offline duTch

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Re: Mainshaft gear separate from main shaft A10
« Reply #10 on: 06.07. 2017 17:32 »

 
Quote
Do you know the name of a good trader who sells new ones?

 I haven't bought anything from either of these but maybe worth a try, others may have experience;

http://www.auto-cycle.co.uk/

  http://www.auto-cycle.co.uk/parts.htm

 or a bit closer to home;

 http://en.vintage-motorcycle.com/index.php?language=en&site=1
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Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Online JulianS

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Re: Mainshaft gear separate from main shaft A10
« Reply #11 on: 06.07. 2017 17:58 »
Julian, is that directed to me or Peter ?

Sorry it was for Peter.
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Online JulianS

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Re: Mainshaft gear separate from main shaft A10
« Reply #12 on: 06.07. 2017 18:03 »
Auto cycle are good, I have bought quite a bit of NOS gearbox stuff from them , and bought a newly made RRT2 mainshaft from them a few years back.

The only issue with it was that the pinion was a very tight fit - tighter than the original shaft.

I think all the repros come from the same manufaturer and are made in small batches.
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Online morris

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Re: Mainshaft gear separate from main shaft A10
« Reply #13 on: 06.07. 2017 22:27 »
Ordered one at De Groot some time ago. Superb quality and straight fit.

https://www.degroot-bsa.nl/index.php?route=product/product&path=51_60&product_id=2558
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Offline peter

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Re: Mainshaft gear separate from main shaft A10
« Reply #14 on: 08.07. 2017 15:00 »
I could remove the gear from the mainshaft ( Press)
The cause of damage:
The ball of the clutch push rod has fallen out and could get somehow to the rear and there between two gears. Now the mainshaft is a little unbalanced it results in a 0,3mm unbalance. A gear is missing a tooth and two other gears have heavy damage. I have three replacements gears so I could repair the gearbox when I know exactly what to do with the mainshaft.
Thanks for the advices and  parts- links.
Best regards
Peter
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1956 Royal Enfield Bullet 350
1956 AJS 18s
1949 Royal Enfield 500 J2
1954 Golden Flash 650
1985 Virago V1000
2001 Wildstar V1600
1966 Velosolex 50
1999 Virago XV 1100
2012 Kawasaki W800
2016 KTM Duke 390