Author Topic: 1972 Yamaha AS3 restoration (another short/20/BAR cable)  (Read 28044 times)

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Online Motty

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Re: 1972 Yamaha AS3 restoration (NOS air filter element)
« Reply #60 on: March 31, 2019, 07:46:31 AM »


With regards to the leak down equipment can you let me know which kit you found works or worked on the 250C. Apologies if you have already said and I have missed it.


Graham's leak down posts are on this topic, you will need to go to post 302 I think

http://www.aircooledrdclub.com/smf/index.php?topic=18881.msg458334.msg#458334

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Offline KGR33N

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Re: 1972 Yamaha AS3 restoration (NOS air filter element)
« Reply #61 on: March 31, 2019, 10:51:10 AM »


With regards to the leak down equipment can you let me know which kit you found works or worked on the 250C. Apologies if you have already said and I have missed it.


Graham's leak down posts are on this topic, you will need to go to post 302 I think

http://www.aircooledrdclub.com/smf/index.php?topic=18881.msg458334.msg#458334

Thanks Richard and Graham......

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Offline Foy(notFox)

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Re: 1972 Yamaha AS3 restoration (NOS air filter element)
« Reply #62 on: March 31, 2019, 02:42:02 PM »
Thanks for that Motty. Yes the leakdown saga was on my 250C thread KGR33N but I do want to do a test on my smaller bikes.
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Offline Foy(notFox)

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Re: 1972 Yamaha AS3 restoration (another short/20/BAR cable)
« Reply #63 on: February 24, 2020, 06:51:30 PM »
Well it's about time for my annual update on this thread  :( >:( (and my others)

I could start with my woes and excuses as usual but this year I've some new musings....

I just spent most of January rebuilding the 1.8 Duratec engine on my Mondeo, out of necessity, and this is far more complex than anything I'll encounter on my motorcycle projects yet I managed this outside in the vile weather in the dark and did it over a period of a few weeks. So why can't I finish the AS3?  :-\

I spend most days contemplating getting rid of every project I have then fearing what life I would have after that - watching TV forever?

A lot of this thinking is done whilst watching TV shows like Salvage Hunters and American Pickers. But my collection is nowhere near the stuff you see on them (thank God!). I buy nothing new and only have the stuff for the 5 bikes and 3 cars I have. Oh and 2 bicycles  ;D. You'd think therefore that there is light at the end of my tunnel. Perhaps.

Anyway here's my latest acquisition. Am sure I've detailed all this before but I'm determined to find a complete set of OEM short cables to use with my OEM flat bars but the throttle cable eludes me. However if I ever see a short clutch or brake cable I buy it and there have even been 2 listings recently for the flat bars (NOS) so surely one day 307 26311 20 will appear. So this is another short brake cable 307 26341 20 and it measures out exactly at 862mm, like the parts list says it should  :)

Again I've mentiond before how the 20 clutch and brake cables have an extra fitting that the 00 & 10 don't - an obtuse-bend noodle at the handlebar end which I guess is to encourage the cables to point in the right direction in the crammed space the flat bars allow round about the headstock area. The short cable also has a spring and washer at the drum end which the others don't. Is this mb to help overcome any resistance caused by the noodle? Who knows....


a rare bird. short AS3/LS2 brake cable




307-26341-20



she's a factory original   



noodle - exclusive to 20 series




as are extra spring c/w washer



I can make this propel me along at 90mph but not so the AS3 
« Last Edit: February 25, 2020, 12:25:55 AM by Foy(notFox) »
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Online Motty

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Re: 1972 Yamaha AS3 restoration (another short/20/BAR cable)
« Reply #64 on: February 24, 2020, 10:58:33 PM »
Hi Graham, welcome back
I'm sure I am not the only one who would welcome you to post more than your current once a year.
If it is only cables you are waiting for, can't you get some made up, or would that spoil all the fun?

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Offline Foy(notFox)

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Re: 1972 Yamaha AS3 restoration (another short/20/BAR cable)
« Reply #65 on: February 25, 2020, 12:32:41 AM »
Hi Graham, welcome back
I'm sure I am not the only one who would welcome you to post more than your current once a year.
If it is only cables you are waiting for, can't you get some made up, or would that spoil all the fun?

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Thanks Motty. Out of the 9 possible cables I am only missing 1 so it's not that which is stopping me finishing the project. I guess the most tangible issue is that the engine is on +.50 pistons/bores and I'm assuming it'll need a +.75 or +1.00 re-bore and you never see AS3 pistons/rings in those sizes. Also I don't trust anyone to de the re-bore. I guess I should really get my measuring tools out instead or fearing the worst.

I'll also be updating my other threads. SS50 one next. What spurred me on today was that I got a new camera and could therefore get good pics of the more recent purchases.

That and the fact I wimped out of a roofing/gutter job today due to the miserable weather  :( 
« Last Edit: February 25, 2020, 06:05:35 PM by Foy(notFox) »
CS3B, AS3, RD125, RD250C, Honda SS50ZK1.

Offline Gr8uncleal

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Re: 1972 Yamaha AS3 restoration (another short/20/BAR cable)
« Reply #66 on: February 25, 2020, 08:50:37 AM »
Enjoying the read Graham.

I've just picked up a near complete RD125B and also an AS3 in boxes to add to my collection.

I'll check later anyway, but I'll be lazy and just ask you to confirm that your AS3 came with Mikuni carbs and not the Teikei (TK) that were fitted to the RDs? In the boxes were a pair of Mikunis with the original grey cables still attached, but also a pair of TKs.

Now to a far more important question! Back in the day (1980s?), were a band called "The Chaps" from your neck of the woods? I ask because they did a version of the song "Rawhide" and in it was a line that went something like ".........dreaming of pints of heavy in East Kilbride"! I have the single in my collection somewhere!

All the best.

Alan
Yam RD200DX (Gr8auntiepat's)
Yam FZX700 Fazer
Yam RD400 bitsa
Yam RD350B rough
Yam RT2 almost finished
Yam DT360A almost finished
Suzi GT550J just started
Suzi 1250 Bandit regular rider
Yam RD125B (probably!) now being reassembled
Yam AS3 in boxes

Offline 5port

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Re: 1972 Yamaha AS3 restoration (another short/20/BAR cable)
« Reply #67 on: February 25, 2020, 10:07:28 AM »
Thanks for the update Foy!  Worth getting the AS3 sorted.  You can get the cylinders/pistons checked out.  You seem to prefer working with things that are right and that is good.  You might well find that they are good used +0.5 !   :)  Even slightly tired could be good enough with new rings for a rider!  :)   Even a bit more worn might be usable for a while.  You know how it is, if you put it together, you will find better parts!   :D    If the bores are really past it and you cant get pistons etc, you could have them relined back to standard!
So, check those bores etc and get it running.  Cheers

5port
5port

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« Last Edit: February 25, 2020, 06:02:26 PM by tony2stroke »

Offline Gr8uncleal

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Re: 1972 Yamaha AS3 restoration (another short/20/BAR cable)
« Reply #70 on: February 25, 2020, 03:46:38 PM »
Just a note of caution here guys. The 396 RD125 rings on ebay linked by Tony are mine and are dykes type, AS3 as far as I am aware are 307 and keystone type. There may be some cross over as on the YR5 where pistons and rings are available in both types, but I would suggest this is confirmed before purchase. I dont have any 307 rings. If you want any of the parts I have listed on ebay 'Rodders44', PM me through here.

Offline tony2stroke

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Re: 1972 Yamaha AS3 restoration (another short/20/BAR cable)
« Reply #71 on: February 25, 2020, 06:00:40 PM »
Just a note of caution here guys. The 396 RD125 rings on ebay linked by Tony are mine and are dykes type, AS3 as far as I am aware are 307 and keystone type. There may be some cross over as on the YR5 where pistons and rings are available in both types, but I would suggest this is confirmed before purchase. I dont have any 307 rings. If you want any of the parts I have listed on ebay 'Rodders44', PM me through here.

YES AS SAID CAUTION ADVISED, there are some AS3 with RD parts on a crossover, 183 is prefix on the pistons, rings 2nd oversize 183-11610-20 and keystone type, sorry got confused, 307 is correct prefix for AS3 but AS1 or AS2 pistons being piston port, same porting,  same stroke and same bore size should work, but some AS3 do have RD heads & barrels with reed valves instead of piston port as we have all found out.



Thank you for pointing that out Rodders, don't want to confuse the issue.


SORRY I get lost in all the part numbers sometimes, I have removed the link to avoid confusion.
« Last Edit: February 25, 2020, 06:05:59 PM by tony2stroke »

Offline Tailchaser

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Re: 1972 Yamaha AS3 restoration (another short/20/BAR cable)
« Reply #72 on: February 25, 2020, 07:06:38 PM »
Alan,

This little ditty:

https://www.youtube.com/watch?v=IWMDuRZBnnw

cheers,

Jeff
RD250E & a Connemara (1HP) pony!

Offline Gr8uncleal

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Re: 1972 Yamaha AS3 restoration (another short/20/BAR cable)
« Reply #73 on: February 25, 2020, 08:07:47 PM »
That'll be the one!
Yam RD200DX (Gr8auntiepat's)
Yam FZX700 Fazer
Yam RD400 bitsa
Yam RD350B rough
Yam RT2 almost finished
Yam DT360A almost finished
Suzi GT550J just started
Suzi 1250 Bandit regular rider
Yam RD125B (probably!) now being reassembled
Yam AS3 in boxes

Offline Foy(notFox)

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Re: 1972 Yamaha AS3 restoration (another short/20/BAR cable)
« Reply #74 on: February 26, 2020, 12:12:30 PM »
Enjoying the read Graham.

I've just picked up a near complete RD125B and also an AS3 in boxes to add to my collection.

I'll check later anyway, but I'll be lazy and just ask you to confirm that your AS3 came with Mikuni carbs and not the Teikei (TK) that were fitted to the RDs? In the boxes were a pair of Mikunis with the original grey cables still attached, but also a pair of TKs.

Now to a far more important question! Back in the day (1980s?), were a band called "The Chaps" from your neck of the woods? I ask because they did a version of the song "Rawhide" and in it was a line that went something like ".........dreaming of pints of heavy in East Kilbride"! I have the single in my collection somewhere!

All the best.

Alan

Hi Gr8uncleal. When you say an RD125B and an AS3 that could mean a few things lol. Apart from one library pic I've never seen a genuine UK RD125B. There are loads of the USA, ones which have many differences, and they seem quite common in France so it would be interesting to know what you actually have.

To me AS3 means an actual (non-RD) AS3 but in France they seem to call the early RD125 models AS3s which is understandable as the engine/frame numbers started AS3-2*****.

About the carbs. Like you I don't have my machines close to hand but I'm 99% sure the AS3 (proper) had (un-painted) Mikuni carbs whilst the early RD125 had a TK carbs which were painted black. Main difference was the RD125 ones bolted to the barrels whilst the AS3 ones fitted onto a spigot.

Re 'The Chaps' and the song referencing East Kilbride: I've never heard of this which is strange as I'm quite knowledgeable about music but more so as the very same day you asked this a friend asked me about another EK band. She was asking if it was true that Roddy Frame from Aztec Camera wrote a song about a pub in East Kilbride.  I spent some time Googling the Roddy frame thing and it was inconclusive but I'm sure there was never a pun in EK called The Diplomat, which is what his song 'Down The Dip' is supposed to be about    :-\
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