Hi all.. new to the site but see a lot of experience being shared here.. hoping i can impose from time to time.

I am gearing up for a complete restoration of a 1970 360 RT1 that Ive held onto since High School.. The bike has been in dry storage, dry climate.. 

As Im doing the takedown i am sorta shopping  for parts. 

Regarding part numbers in my Parts and Service manual 70-71, many part numbers are still available as the book is calling out.. 

I read a article here written by administrator that laid out a lot of info..

First 3 numbers, first year used.. ie:214 / 1970

Next 5 are the part id.. prefaced by a W if memory serves referencing a group..  ive not seen that yet

Next 2 a revision.. 

My question to the experts concerns interchangeable parts through models and years. 

For example:

My manual calls out a lighting coil (2) / stator plate
275-81314-20

Is a 233-81314-20 the same application/part .. just a earlier year and would it work if that part was needed. 

Id appreciate any incite. 

Cheers,

Drac


 

Hi,

I am by no means an expert but I was pointed down this route when I first joined.  if you look in the “how to” section in the tech library 
there is a thread called decoding Yamaha part numbers (or something like that).

yamaha-enduros.com/index.php/workshop/de...-yamaha-part-numbers

this shows you the first 3 numbers are actually the model code. 

for fitting to various models I was pointed to the cmsnl web site.  www.cmsnl.com/en-gb/yamaha-rt1-1970-usa_...ghting-2_2758131420/

Look up you part and it shows what other models that part was used on. It’s a really good place to start looking.   The partzilla website also does this I think. www.partzilla.com

hope this helps and I am sure I will be corrected if incorrect.

cheers. 

I agree with Ian (Tinker man).

Generally I try to stick to the specific part for a specific bike. However, it is quite possible that other parts can be "made" to fit with little bother.

Regarding your lighting coil, CMSNL has a photo of the 233....... part, and this has 5 wires. There are new 275..... parts on fleabay, and these show 4 wires, so maybe a fitting issue here. Also, they might be different sizes.

CMSNL and Partzilla often show if a part has been replaced (aka superseded). 

Regarding your stator plate question . The 233 prefixed plate is for a 250 primarily  . The 275 plate is for the early 360 . 
The early 360 had a cam advance mechanism in the flywheel . The 250 did not .
The flywheels and stator plates have to match , as the ignition points are mounted in slightly different positions .
Technically you could install a complete 250 system on your 360 , but that could be problematic .
The 360's had a bit of a reputation  for a nasty kickback , when attempting to start .
With the 275 stator , the timing is retarded for initial starting . With a 233 stator it would be on full advance already .
In 1971 Yamaha fitted a compression release to the cylinder to further assist starting , and in 72 abandoned the 
ignition advancing stator and flywheel . It has been suggested previously that rearding the ignition from factory settings
a bit , also reduces the kickback tendency .

You left off "signed, Chester"
Need to be old to get this, I think