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Old 06-22-2013, 11:14 PM   #136
Box'a'bits
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Location: Wellington, New Zealand
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....Ah, but you came through in the end...
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Old 06-22-2013, 11:27 PM   #137
Micawberism
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Right then, thats that )Pack up me portable generator, pipe and slippers , and go back inside by the heater
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Old 08-23-2013, 12:33 AM   #138
Padmei OP
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I'm going to start putting the motor back together tomorrow. I initially took it apart after finding the main bearing locator pin in the sump. What can happen without this inserted is the main bearing can twist & block off the oil galleries which can lead to melt down.
So the main bearing looked ok as did the crank etc. Over the period of time the engine sat in bits on the bench the task of reassembling it seemed to get more out of my comfort level. A short period of re accustoming myself with the parts reassured me it seemed pretty straightforward as long as I reverse the method of disassembly.

Remember this isn't going to be a RTW bike & only the bare essentials are being replaced as I want it to be a runner. I am reusing many parts like the gudgeon pins, old valve seats etc. It may only see a few thousand Kms over the next few years, if that.

I am unsure about the lining up the crank sprocket with the cam sprocket. I believe on Schmidt I marked prettty well where they lined up however on this motor I haven't. I have noticed the cam has a timing mark & the woodruff key on the crank looks to be half way between TDC between both cylinders.I will check snowbums site but any help is appreciated.

Also if there are any tips re anything to do with the motor reassembly.
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Old 08-23-2013, 12:39 AM   #139
Box'a'bits
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Crank & cam sprocket both have marks on them. Line them up at 6.00 & 12.00 o'clock when the engine is at TDC. Easy peasy.

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Old 08-23-2013, 12:40 AM   #140
Padmei OP
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No I can't see crank marks. Maybe I'll get the old one off Schmidt & check it out, the key would b in the same possy.
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Old 08-23-2013, 12:53 AM   #141
Box'a'bits
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Quote:
Originally Posted by Padmei View Post
No I can't see crank marks. Maybe I'll get the old one off Schmidt & check it out, the key would b in the same possy.
Simplex or Duplex cam chain? On the RS (duplex chain) the key is at 9.00 o'clock to put the mark at 6.00 o'clock . Look harder. Couldn't find Gus's old crank sprocket quickly, but will look again tomorrow.

Synchronicity again. I'm about to restart work getting the RS up & running (so that I can sell it) . I'm thinking it will be too hard on my back to ride now
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Old 08-23-2013, 01:11 AM   #142
innathyzit
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Don't need timing marks, just make sure the valves or cam followers are rocking when the other cylinder is at tdc. One tooth is a long way out so it should be pretty obvious.

Unless airheads are speshal.
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Old 08-23-2013, 02:21 AM   #143
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Originally Posted by innathyzit View Post
Don't need timing marks, just make sure the valves or cam followers are rocking when the other cylinder is at tdc. One tooth is a long way out so it should be pretty obvious.

Unless airheads are speshal.
I'm pretty sure I read somewhere recently that one tooth out isn't too far out - may be mistaken tho. I was going to put the bottom end on first & do the barrels etc last. maybe I'll look tomorrow.

I can't believe you have to sell the RS Steve. How long have you had it? It must be part of the family by now.
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Old 08-23-2013, 02:33 AM   #144
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Quote:
Originally Posted by Padmei View Post
I'm pretty sure I read somewhere recently that one tooth out isn't too far out - may be mistaken tho. I was going to put the bottom end on first & do the barrels etc last. maybe I'll look tomorrow.

I can't believe you have to sell the RS Steve. How long have you had it? It must be part of the family by now.

...... If it's a 40 tooth sprocket... one tooth is 9*





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Old 08-23-2013, 02:39 AM   #145
Box'a'bits
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Originally Posted by Padmei View Post
I can't believe you have to sell the RS Steve. How long have you had it? It must be part of the family by now.
Only had it 23 years...Don't have to sell it, but just don't think I'll use it, & have other things the money invested there would be better spent on. But I could change my mind. It's happened before.
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Box'a'bits screwed with this post 08-23-2013 at 02:52 AM
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Old 08-23-2013, 02:42 AM   #146
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Originally Posted by Pete-NZ View Post
...... If it's a 40 tooth sprocket... one tooth is 9*
.
You mean one tooth on the crank?
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Old 08-23-2013, 02:46 AM   #147
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Originally Posted by Padmei View Post
You mean one tooth on the crank?
cam....
crank has half the teeth 2:1 ratio...
so one tooth on the crank would be 18*

Devide 360 by the number of teeth = degrees per tooth...
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Old 08-23-2013, 02:50 AM   #148
Padmei OP
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Quote:
Originally Posted by Pete-NZ View Post
cam....
crank has half the teeth 2:1 ratio...
so one tooth on the crank would be 18*

Devide 360 by the number of teeth = degrees per tooth...
Cheers.
Hows the workshop - had a looksie lately? If you want I can take a trailer over & bring a few things over - like the lather, milling machine...
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Old 08-23-2013, 02:53 AM   #149
Pete-NZ
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Originally Posted by Padmei View Post
Cheers.
Hows the workshop - had a looksie lately? If you want I can take a trailer over & bring a few things over - like the lather, milling machine...
Tell yer what if yer can get those dam things on a trailer...
yer can bring them down here....
I will have a chocy fish waiting for yer...





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Old 08-23-2013, 02:54 AM   #150
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Tell yer what if yer can get those dam things on a trailer...
yer can bring them down here....
I will have a chocy fish waiting for yer...
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