Hi guys , happy to be here again with the 2SW forum , I will pick up this bike next weekend , it's a 1969-70 TR2 350cc , 35th out of the production line so it's an early one . Surprisingly in good shape for an old racer with beautiful wheels and a straight aluminium gas tank , I'm looking at returning it to its former glory . As you can see someone spirited added some gears to ride it on the street . What puzzle me at the moment is the motor , a RD350 73-75 in race trim with a stamped serial number beginning with the model code 351 and 351 relate to a Japanese market only RX350Pro . What is a RX350 pro ? Not much available on the net about it. No history come with it but Yvon Duhamel rode one at Daytona with a record lap of 242 km/h , maybe ...
It will need the correct red front fender , tach meter with support an a throttle to replace the RD one .
(https://live.staticflickr.com/65535/48970703191_637908935f_z.jpg)
(https://live.staticflickr.com/65535/48970876737_54e4dbd2d8_z.jpg)
(https://live.staticflickr.com/65535/48970155928_7b93a4415a_z.jpg)
What it should look like
(https://live.staticflickr.com/65535/48970703036_e8a132029c_z.jpg)
Very nice looks good the way it is.
351 = def. aircooled rd. the left engine cover 73-up rd. the cyl fin layout i believe is the real indicator of what the topend is off of as well. I'm pretty sure the fins are 'staggered' on the tr3 cyls. thats a stock rd topend from what i can see as well.
my initial feeling is its a tr3 chassis with aircooled rd driveline.. which IMHO is ideal for a street ridden ex race bike if thats what you are going for.. its a very cool find though. def worth cosmetic restoration, im a bit jealous..
Man I LOVE that 4LS.
After some research , the 351 model relate to a Japanese market version of the R5 , could this be a factory replacement motor ?
One front wheel ( 4LS ) sold on eBay lately for $2000. USD
I am insanely jealous, great find!!!!! :whoop:
i seriously doubt that's accurate. I own serial number 2000 70 r5. it starts 'r5... ' theres a '1600' series one at barber, same thing. thats an rd bottom end. 351 is only rd350. 352 is rd250. ds7 is 'ds7' and early 'tz' cases.
Yep. 351 xxxxx is a regular ol' Rd350
Check the number on the head stock, I betcha you got a RD350 with a early TZ tank, swing arm and wheels.
Those pipes are interesting. how are they affixed to the jug? What is the head pipe diameter?
Piston port or reed block?
If you're looking for TZ/TR/TD parts
jim at bitzz dot com
I'm near Peterborough.
Quote from: idr5c on October 28, 2019, 01:07:15 PM
I am insanely jealous, great find!!!!! :whoop:
No need to be jealous. Old Yamaha racers are easy to find... ya just have to pony up the cash.
... so actually you're not jealous, you're envious.
Quote from: bitzz on October 28, 2019, 02:44:27 PM
Yep. 351 xxxxx is a regular ol' Rd350
Check the number on the head stock, I betcha you got a RD350 with a early TZ tank, swing arm and wheels.
Those pipes are interesting. how are they affixed to the jug? What is the head pipe diameter?
Piston port or reed block?
If you're looking for TZ/TR/TD parts
jim at bitzz dot com
I'm near Peterborough.
I don't think that's an RD frame. If it is someone did a nice job of making it look like a TD or TR frame. Hard to tell for sure with the side panels on. Look at the rear hangers on the pipes too.
I agree w you joe, thats what i was driving at, race chassis with street motor. id guess, they gut up a 73 judging by the side cover emblems and split fin heads. is the engine number 351-1****? if so, 73 RD350 motor.
I do remember seeing stuff on the usa 2 stroke site like 10 years ago about rd 'pro models' with disc brakes, etc, but i think that was all fabricated BS or prototype stuff? beats me. never production though. If so, was so stupid rare no one has ever seen one.
https://japan.webike.net/YAMAHA/RX350/852/m-spec/
im pretty sure it was a pre production model with the disc, or prototype. regardless, they had piston port motors if they actually did exist in that format. And they never used the 351 designation. Sorry, '351' prefix just didn't exist in yamaha world until 1973 production. Russ has probablyt he most comprehensive list of yamaha numbers on hand, maybe he will chime in.
(http://www.2strokeworld.net/wp-content/uploads/other-bikes-related/bd2f8144aa221c85661e7caefde8d37a.jpg)
What I saw was first 2 years were drum third was disc. First year was red great paint scheme. https://japan.webike.net/YAMAHA/RX350/852/m-spec/y1970/
Im still skeptical they ever actually produced a disc model. maybe. But ive never seen a real deal one, ever, in shows, museums, etc. replicas, yes. either way, thats not what the OP has.
Maybe that's it. But they never seem to show up in my area, so I had to build my own to thrash around the track.... which will someday be an old find and the cycle will continue.
Quote from: bitzz on October 28, 2019, 02:51:29 PM
Quote from: idr5c on October 28, 2019, 01:07:15 PM
I am insanely jealous, great find!!!!! :whoop:
No need to be jealous. Old Yamaha racers are easy to find... ya just have to pony up the cash.
... so actually you're not jealous, you're envious.
I have no idea what he has, I just never heard of the RX don't know what all is different about it than R5 but it looks better for some reason.
It's not an RD or R5 or RX WTF frame. Now that I look closer it's not even a TR3 frame. Look at the design of the tubes up by the steering head. I'm pretty sure it's a TD frame.
I got my info on the 351 prefix on the motor from this model codes list , as I can see it's misleading . RD350 1973 is stated as 360 .
(https://live.staticflickr.com/65535/48976885943_195e925e98_z.jpg)
Stamped number on the motor
(https://live.staticflickr.com/65535/48977403571_5974cdcfcf_z.jpg)
More pics , it look like a genuine TR2 frame and it's stamped accordingly as TR2-.....
(https://live.staticflickr.com/65535/48977412511_f3136fe505_z.jpg)
(https://live.staticflickr.com/65535/48976858963_2eea0b5ffc_z.jpg)
(https://live.staticflickr.com/65535/48977417881_584433b9bf_z.jpg)
A racer with a side stand
(https://live.staticflickr.com/65535/48976865918_47fe331846_z.jpg)
i cant speak to the frame, but i was right on the motor for sure.
have to ask, what did you pay for it?
$2500.
I dig it.
Seems like a steal. That thing is sweet!
What you have is a TR2 or TR2B with an RD motor. Forks and levers and frame and swingarm and wheels are all genuine race parts as far as I can tell from those pics. Tank is correct and the seat was a TR seat but has been stretched to take a rear lamp.
Fairing is also TR2
Pipes were TR or TD2 but the front ends were modified to fit on RD barrels.
The front fender is street and can be replaced with a MeadSpeed replica. Motor may be street or may be tuned. You will find out when you strip it.
Side stand pivot was added by a PO. They were not used on the TR/TD production racers
Mos def, a steal of a deal!
Looks killer!
I would drain the motor and put it in my living room!
Good luck on a super fun looking journey!