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Tech Zone => Hot Topics => Topic started by: SupeRDel on December 25, 2005, 02:47:49 PM

Title: Yamaha RD350. The Model Guide
Post by: SupeRDel on December 25, 2005, 02:47:49 PM
The Basic Yamaha RD350 Model Guide

 




This is a list of the models thru the 350cc range to the best of my knowledge. This list is UK based. Overseas models details may vary.



The Yamaha R5. Around 1971/72. The model pre RD









Yamaha RD350 This is the USA model with the slim line tank









This is the RD350 in Brandy red that appeared in 1973. Most people will call this the A model. Some say its just the plain 250 with no A model letter prefering to call the 1974 model the A. The choice is yours. Some of the very first of the RD range had drum brakes









Yamaha RD350A The 1974 model, just different colours and graphics. You see very few of this variation about today. The early and late models seem to be more popular. There were none at the club rally in 2005 and 2006. The club stand did a complete year by year model line up at the Stafford classic show in 2005. Along with the 250 this model variation was the only one missing..





Yamaha RD350B

1975/76. The last of the 350"s, most common in the UK in Silver.









From 1976 the 350 was replaced by the bigger RD400



However The RD350 did not dissappear forever in 1976. A detuned version of the RD350B was introduced in India under the brand name of Rajdoot in 1983. These machines were delivering 31bhp. Then the decision-makers at the Indian plant had this "idea" of increasing the fuel efficiency of the RD. So one more version hit the roads in the early 1985. This was called the LT (low torque). This machine delivered 26 bhp. But the marquee died because of the mileage concerns. The Indian market (and also the roads) was not yet ready for bikes of RD"s calibre. Sadly till date we have not had a better bike on Indian roads. The last RDs rolled out of the factory in 1989. There still is a community of RD350 enthusiasts in India with the odd member visiting this forum.



++++++++++++++++++++++++++++++++++++++++++++++++++++++++



The RD350 was too return in 1980 though with a watercooled engine..........















Colours..UK and Europe. some seen in the US as well  1973.. RD350A2.. Brandy RedF2.. Butterfly Blue3469.. M2/GLD..  Gold DustK1.. Competition Green1974.. RD350A  F3.. Brigade Blue (never seen a 350 in this)3469.. M2/GLD.. A8.. Ruby Red1975.. RD350B N3.. Amber Brown 1653.. 63/BR..  Brillant Red N8.. Golden Bronze F7.. High Sparkly Blue G7.. Regal Blue Y1.. Silver Dust





Title: Yamaha RD350. The Model Guide
Post by: SupeRDel on August 13, 2006, 07:11:57 AM
Wot you see above is just a basic guide there are many variations around the world. I will try to add more of the model colours and numbers when I can. If you have any information and details to add then please do so below and I will see wot I can do to add to the listing. If you are new and have a question then please ask via the "tech section" or try the forum "search". Many questions repeat so your answer may already be there. If not or No luck then please ask
Title: Yamaha RD350. The Model Guide
Post by: Welsh_Dragon on August 07, 2009, 02:42:09 PM
according to the above,

Colours..UK and Europe. some seen in the US as well

RD350B N3.. Amber Brown 1653.. 63/BR.. Brillant Red N8.. Golden Bronze F7.. High Sparkly Blue G7.. Regal Blue Y1.. Silver Dust



Dont know if i have ever seen the amber brown/golden bronze or brilliant red over here though
Title: Yamaha RD350. The Model Guide
Post by: Saint-Ex on August 07, 2009, 05:25:34 PM
Any colour info for the "73 RD 350. UK or US?



I remember seeing a pic on this site with colour samples but is sort of in the background of an RD400 if think (Can"t find it now that I"m looking for it)



What would be nice are colour chips or profiles from a

period brochure. Period colour codes mean little to the local paint shop.



Anything in your archives Bridlad?





Title: Yamaha RD350. The Model Guide
Post by: Alyn Vincent on August 22, 2009, 04:15:54 AM
Just discovered this site & would like to add a few words. In Australia the RD350 was introduced in 1973 & was available only in Red (or Burgundy) with disc brakes & non folding footpegs. I still have my original receipt for $889. The RD350A was introduced in 1974 with folding pegs, different colours & different striping on the tank. These were still fitted with "MPH" speedometers until October 1974 when they became "KPH" units. My current bike is an early 1974 model & I don"t see its colour on the "tank board". The dark metallic green was popular colour here but the striping is also different to what is posted.

Title: Yamaha RD350. The Model Guide
Post by: SupeRDel on August 22, 2009, 08:25:49 AM
The stripping/decals are the standard design for the 74 model - my 250 in the UK had it.



I have seen one dark green in the UK but never seen the colour listed.



As for the colour being popular there it probably because Yamaha seemed to import just one colour into some countries in the early days.



In the UK in 1974 all the 350"s like yours seemed to be purple in the UK. The 1973 350 was always in brandy red and the 1975 RD350B was silver
Title: Yamaha RD350. The Model Guide
Post by: Jim Dew on January 11, 2011, 07:51:26 AM
I have the very dark green RD350, 1974, not mentioned on this thread so far.

I note the Brandy Red one (same decal stripes as mine) has plain metal carbs, but the 74 pictured has black ones.

Which is correct?
Title: Yamaha RD350. The Model Guide
Post by: triode on October 25, 2011, 02:52:54 PM
Saw this old Yamaha ad for the RD350 and just had to steal it.  

Title: Re: Yamaha RD350. The Model Guide
Post by: stevie747 on January 23, 2014, 11:26:22 AM
I have the very dark green RD350, 1974, not mentioned on this thread so far.

I note the Brandy Red one (same decal stripes as mine) has plain metal carbs, but the 74 pictured has black ones.

Which is correct?

Did you ever find out about the carb finish - I have the same question, plus were they hi-top's' or not  ???
Title: Re: Yamaha RD350. The Model Guide
Post by: twostrokelooney on January 23, 2014, 07:40:35 PM
Steve,

My 350 is a 1973 UK model and used to be Brandy Red in another life (will be again next year  :))
My carbs are black and low top as standard.






Title: Re: Yamaha RD350. The Model Guide
Post by: stevie747 on January 24, 2014, 12:20:05 AM
OK thanks, were hi-tops 350B only or was it a bit blurred between models?  Maybe there's a post somewhere explaining what should get what  ???
Title: Re: Yamaha RD350. The Model Guide
Post by: miciver on January 24, 2014, 12:13:28 PM
Some 350A's had high tops (later ones) but earlier ones low tops...... :-\
Title: Re: Yamaha RD350. The Model Guide
Post by: SupeRDel on January 24, 2014, 03:30:29 PM
[attachimg=1]

[attachimg=2]
Title: Re: Yamaha RD350. The Model Guide
Post by: stevie747 on January 25, 2014, 12:41:51 PM
Thanks, is there a list somewhere with how many models of each type were originally imported/registered in UK?
Title: Re: Yamaha RD350. The Model Guide
Post by: DVSRD on September 05, 2014, 10:41:06 PM
The above means that both my RDs are 350A, since the unmodified one still has the original "Gold Dust" paint. This bike was bought new by my cousin in 1975, in Norway. And my other 350, which was first registered in 1976 must also have be an A model, since I have found the same "Gold Dust" paint when sanding down multiple layers of paint. The 6th gear was blocked on both, and both have Hi-Top carburetters and Mitsubishi generators. Also, the unmodified one had a fairly high and swept back handlebar. Are these US models then?
Title: Re: Yamaha RD350. The Model Guide
Post by: russiansteel on November 16, 2014, 07:28:10 AM
Quote from: SupeRDel
.....

1975/76. The last of the 350"s, most common in the UK in Silver.

([url]http://www.aircooledrdclub.com/smf/attachments1/48/Images/phpvCjl7tPM.jpg[/url])
....

Hi,
It just occurred to me with this photo, it has chrome fork dust seal and rear side reflector - I haven't seen them on any other RD's. Are they just random retrofit?
Any idea which model the dust seal covers are off, cos I wouldn't mind those one - I think they look sharp. (not so much the rear side reflectors though)
Thanks,
Sam
Title: Re: Yamaha RD350. The Model Guide
Post by: RDnuts on November 16, 2014, 03:21:06 PM
the chrome covers are not standard on an rd they come off r5 ds7 the other side reflectors are again not standard ,pm me i have a nos pair of those covers , not cheap though  ;)
Title: Re: Yamaha RD350. The Model Guide
Post by: Alfie on November 17, 2014, 12:52:49 PM
Quote from: SupeRDel
.....

1975/76. The last of the 350"s, most common in the UK in Silver.

([url]http://www.aircooledrdclub.com/smf/attachments1/48/Images/phpvCjl7tPM.jpg[/url])
....

Hi,
It just occurred to me with this photo, it has chrome fork dust seal and rear side reflector - I haven't seen them on any other RD's. Are they just random retrofit?
Any idea which model the dust seal covers are off, cos I wouldn't mind those one - I think they look sharp. (not so much the rear side reflectors though)
Thanks,
Sam


Interesting this is a blue UK spec RD.

When I was a youngster a couple of my mates then (74 - 75) had Blue RD's so I think blue was an official colour for the UK.

 
Title: Re: Yamaha RD350. The Model Guide
Post by: RDnuts on March 06, 2015, 07:18:29 PM
dont take much notice of the photo regarding uk spec it says nowt , the regal blue is not an official uk colour , although does not mean that some might have come in via the back door, been covered in the other posts,dont you have any pics of your mates bikes back in the day?
Title: Re: Yamaha RD350. The Model Guide
Post by: 5port on February 25, 2016, 01:43:23 PM
Nothing much in here yet about the European 521 (350) and 522 (250).  Think they came with the '75 model year and have the close ratio 6 speed gearbox that helped them be so good.  Certainly remember them being very good performers in the day.  Cheers
Title: Re: Yamaha RD350. The Model Guide
Post by: 5port on March 15, 2016, 10:11:14 PM
Yes, the UK / European  1975 RD250B type 522 and RD350B type 521 were fitted with the closer ratio six-speed box, hi-top carbs and different cylinder heads.  Engine numbers started 522 for 250 and 521 for the 350.  Anyone know what the frame number started with on these UK/Euro 250B/350B?   Cheers
Title: Re: Yamaha RD350. The Model Guide
Post by: betty foRD on March 17, 2016, 05:07:33 PM
VIN indexing started at 000102 according to Nutty


http://www.aircooledrdclub.com/smf/index.php?topic=38523.msg298761#msg298761 (http://www.aircooledrdclub.com/smf/index.php?topic=38523.msg298761#msg298761)
Title: Re: Yamaha RD350. The Model Guide
Post by: 5port on March 17, 2016, 06:54:22 PM
Thanks Peter!  Nutty states that the UK/Euro 250B/350B came with engine and frame numbers starting 522 and 521.  That makes sense.  These were mechanically different to the USA 250B/350B in the carbs, cylinder heads, gearbox ratios (521 type close ratio) and their final sprocket sizes (ratio's).  Cheers   
Title: Re: Yamaha RD350. The Model Guide
Post by: betty foRD on March 18, 2016, 10:20:16 AM
Don't forget the exhausts, clocks, airbox, seat, plus mudguard transition on the later ones .....probably some more things if my recall was tip top...Lefthand switch gear pass button (or did that first appear on the A) ..then the introduction of the second carb difference ( 522 01) carb, with the casting used on later models but with the inspection port un drilled.

For me its what makes the 521 B so interesting, so much change for relatively few produced.

The model prefixes are of-course 521 and 522. VIN indexes generally start at X00100, the first 100 of any model being the preproduction prototypes. The first digit of the VIN index is typically used to identify year or geographic region.

I've always been curious to figure out how many 350 'B's came to Europe and in what VIN rage groups as generally all UK bikes have VINs in the 000100-002500. Some of the German ones were 1xxxxx but they also got some of the 0xxxxx. I've not seen a UK 1xxxxx.

One day I'll have a stab at collating a profile based on info that available, but right now its a struggle just to find a few minutes to get in the shed and tinker!


Title: Re: Yamaha RD350. The Model Guide
Post by: ozmadman on March 18, 2016, 03:51:10 PM
What are the differences in the carbs themselves (apart from the number on the casting) and cylinder heads between the USA and Europe models?  Also, the USA Spec 250/350 does not have a sidelight so the lighting switch and wiring is different
Title: Re: Yamaha RD350. The Model Guide
Post by: 5port on March 18, 2016, 05:49:12 PM
Paul, the 522 carb differences from earlier 250/350 and USA "B" are: needles, slides, main jets and......air corrector feed from the airbox.  The cylinderheads might have different profile/ CR?  But, they do have a different casting with thicker dome, long thread plugs and, no cast-in anti fin-ring bridges, just rubbers. ;)
Title: Re: Yamaha RD350. The Model Guide
Post by: 5port on March 18, 2016, 08:04:55 PM
Don't forget the exhausts, clocks, airbox, seat, plus mudguard transition on the later ones .....probably some more things if my recall was tip top...Lefthand switch gear pass button (or did that first appear on the A) ..then the introduction of the second carb difference ( 522 01) carb, with the casting used on later models but with the inspection port un drilled.

For me its what makes the 521 B so interesting, so much change for relatively few produced.

The model prefixes are of-course 521 and 522. VIN indexes generally start at X00100, the first 100 of any model being the preproduction prototypes. The first digit of the VIN index is typically used to identify year or geographic region.

I've always been curious to figure out how many 350 'B's came to Europe and in what VIN rage groups as generally they all have VINs in the 000100-002500. Some of the German ones were 1xxxxx but they also got some of the 0xxxxx. I've not seen a UK 1xxxxx.

One day I'll have a stab at collating a profile based on info that available, but right now its a struggle just to find a few minutes to get in the shed and tinker!

Cheers Peter!  Do it and post on here.  What can you tell me about the airbox differences please?

Title: Re: Yamaha RD350. The Model Guide
Post by: betty foRD on March 18, 2016, 08:33:14 PM
The airbox on a 522/521 has the two extra holes and grommets to accept the pipes from the carbs. The holes are not present and obviously not required on earlier models, but interestingly its another case of where the parts list doesn't match the reality...the 521 parts list shows the 360 part number but you can't use that directly because there are no holes ! It's easy to modify one to suit but that's not really the point.
To me the interesting thing is all the change detail that was never fully captured in published documentation. Ultimately its the enthusiasts who will identify the historic erratum and place in the public domain.





Title: Re: Yamaha RD350. The Model Guide
Post by: betty foRD on March 19, 2016, 01:59:24 AM
What are the differences in the carbs themselves

You could say truthfully that they were the first with a big pair of balls !

The balls being those that access the air jet, with much written about on here regarding their removal and replacement.
Title: Re: Yamaha RD350. The Model Guide
Post by: ozmadman on March 19, 2016, 02:22:07 AM
You could say truthfully that they were the first with a big pair of balls !
The balls being those that access the air jet, with much written about on here regarding their removal and replacement.
yes, no balls on my B
Title: Re: Yamaha RD350. The Model Guide
Post by: Sfbrain on May 16, 2017, 05:21:36 PM
Common as muck ........................................

and rare at the same time  :D :D :D

[attachimg=1]

 ;)
Title: Re: Yamaha RD350. The Model Guide
Post by: stukey on May 17, 2017, 12:06:24 AM
probably a never to be seen again occurance :o
Title: Re: Yamaha RD350. The Model Guide
Post by: cooleronthecoast on May 17, 2017, 04:03:44 PM
Nice  :)
Title: Re: Yamaha RD350. The Model Guide
Post by: Rocky2010 on October 11, 2017, 12:20:20 AM
Very nice stable of RD's  :)
Title: Re: Yamaha RD350. The Model Guide
Post by: stukey on October 11, 2017, 07:58:17 AM
the two in the front were restored by steve from a pile of parts supplied by me. The one at the back is owned by my good friend dave who i bought it from 30years ago  and is now back with him :) :)
Title: Re: Yamaha RD350. The Model Guide
Post by: krishnakc on October 11, 2017, 09:55:53 AM
Very nice collection of Rds
Title: Re: Yamaha RD350. The Model Guide
Post by: betty foRD on October 18, 2017, 10:21:56 PM
Then there were these at the rally, 2 of the 3 are the same...
Would be good to get 4 or more together ...needs panuno, Steven, Dave H and the rest of us all to be in the same place at the same time !
Title: Re: Yamaha RD350. The Model Guide
Post by: Smurfmobile on May 09, 2018, 07:16:09 AM
Hi All, just joined this club and already asking advice; I have an RD350? which is in a poor state but was starting fine so I decided to dismantle and smarten it up a bit. Started with new forks and all the cables etc.  I bought the bits through a UK based company Wemoto who have supplied me with many parts now.  Not sure of the exact model but it should be '73 or '74, original paint (shiny red) and engine and frame no. 351-225678, sold in Perth Western Australia, now in Albany, south coast of WA.  Any info on year and model would be appreciated.