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How I found her and most of my progress so far.

A rear brake bracket has been welded on and the bar mounts got lowered an inch.






Sent from my iPhone using Tapatalk
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Aircooled RD Tech Help 250cc and Above / Re: STD reeds to Boysen Reeds
« Last post by 5port on Today at 10:36:58 AM »
The standard Yamaha spec for the reed stops is partly to keep the bending of the reed petal within the tolerance of the metal that avoids fatigue failure.  You might find problems with reeds that are asked to open (bend) wider or, that have been deformed.  Plastic/fibre/carbon etc reeds have some issues, like spliting/delaminating/taking a set, that can show very quickly.  However, I am confident that the genuine Yamaha YZ125 type reeds will have a good quality.  Anyone know what servicing Yamaha state for the plastic YZ125 reed petals?  Cheers

5port
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Please have a look and vote on this pole    https://www.aircooledrdclub.com/smf/index.php?topic=58077.msg460434#new   Thank you all.
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Aircooled RD Tech Help 250cc and Above / Re: Broken reeds
« Last post by tony2stroke on Today at 09:40:11 AM »
Thank you Butt.
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Aircooled RD Tech Help 250cc and Above / Broken reeds
« Last post by betty foRD on Today at 09:21:55 AM »
Question applies to standard steel reeds installed correctly in unmodified reed blocks.

Poll on behalf of Tony.


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Out of curiosity, could someone that knows how, post 1 of those pole things asking for anybody that has had a standard steel reed in a standard engine fail and those that have not, not including people that bent their reed stops first, just standard, I would like to know and I am sure others would also.

I don't know much about how to do these things, I am a bit discoelectric (they called us remedial in my day) and get fuffed up with computer stuff, I have to google most of my spelling because of peoples comments on it, so could someone do this for me please.
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I bought a RH side lower from a 400C or D, to be used on my 350A. Just because I think it looks better with the caliper behind the fork leg, and there is less problems using a 1 piece brake hose with that setup, without conflicting with a TZ type fiberglass front mudguard. Will get tis done whenever I get home from this hitch at sea.

Rigs, trawling, cargo, cruise?
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I bought a RH side lower from a 400C or D, to be used on my 350A. Just because I think it looks better with the caliper behind the fork leg, and there is less problems using a 1 piece brake hose with that setup, without conflicting with a TZ type fiberglass front mudguard. Will get tis done whenever I get home from this hitch at sea.
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They were “in the wind”.  PO must have figured not needed. I did rebuild the pump fully and had lots of fun with that....
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Aircooled RD Tech Help 250cc and Above / Re: STD reeds to Boysen Reeds
« Last post by DVSRD on Today at 05:45:45 AM »
I never intended to claim any massive performance increase from changing reeds. Just pointing out the development since the 70s. And Ed E. does in fact  recommend YZ reeds even for stock RDs. Just at the beginning of his article..

Another argument for fiber reeds is availability. I doubt that original steel reeds are available from Yamaha anymore. Original YZ125 reeds are available.  Used reeds, even if they look good, will have been subjected to an unknown number of load cycles. That means there is a risk of them breaking from metal fatigue. I would not take that risk, knowing the cost of engine rebuilding.
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