New member XS650-J - model question

Tomasz Tomaszewski

XS650 Member
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Location
Warsaw, Poland
Hi All,
I am new into XS650 world, not necessarily new to oldtimers/vintage bikes, and wanted to say Hi to the community.
I posted some carb question on XS650 fb profile and due several questions, Joe advised to switch here and present my bike, asking for your experience regarding the model/parts applied, etc.

Here is bike:
Looks all original, not reworked, below 100k km, all part fits very well.
I have all documentation back to May 1981 when this was first registered in Germany.
Compression - great.
XS650-J / 1981 taking into consideration frame #
Mikuni BS38 (should be BS34 for this year)
Left engine cover looks like "Special" models with oil level window.
Point ignition (expected to see electronic).

Now working on carb adjustment, right cylinder seems does not receive mixture, but all vacuum, gas lvl, mixture are all set. Plan to go thru the std checklist to see what is going on.

Comments and experience would be appreciated.
 

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Hi All,
I am new into XS650 world, not necessarily new to oldtimers/vintage bikes, and wanted to say Hi to the community.
I posted some carb question on XS650 fb profile and due several questions, Joe advised to switch here and present my bike, asking for your experience regarding the model/parts applied, etc.

Here is bike:
Looks all original, not reworked, below 100k km, all part fits very well.
I have all documentation back to May 1981 when this was first registered in Germany.
Compression - great.
XS650-J / 1981 taking into consideration frame #
Mikuni BS38 (should be BS34 for this year)
Left engine cover looks like "Special" models with oil level window.
Point ignition (expected to see electronic).

Now working on carb adjustment, right cylinder seems does not receive mixture, but all vacuum, gas lvl, mixture are all set. Plan to go thru the std checklist to see what is going on.

Comments and experience would be appreciated.
Hi Tomasz,
Welcome to the world of XS650.
You have a great machine to start with; I would love it!
Plenty of help here; and check out the Tech Section for lots of info.
Questions a very welcome with supporting photos.
And we love to follow the progress; did I say lots of photos.
Good luck with the build.
Adam (Ads.) Cichy.
 
Hi Tomasz,
Welcome to the world of XS650.
You have a great machine to start with; I would love it!
Plenty of help here; and check out the Tech Section for lots of info.
Questions a very welcome with supporting photos.
And we love to follow the progress; did I say lots of photos.
Good luck with the build.
Adam (Ads.) Cichy.
Thx Adam, should I understand, you're located in Poland?
 
Thx Adam, should I understand, you're located in Poland?
May dad was Polish; an Auschwitz survivor who settled in Wales after the war. Mum was Welsh... So I'm a half Polish / Half Welsh human!.
I am based in Cardiff South Wales UK, as my avatar states.
 
Welcome to the forum!
Everything I see says Euro standard model; just a main fuse, no fuse box?
Yamaha was (is) smart, using up all remaining parts from discontinued models by continuing to sell limited numbers for a year or two into small markets; like Germany. There was one an 81 like this for sale in the US a few years ago, a serviceman brought it back from Germany, but I no longer remember the exact details.
Great looking machine in outstanding condition! Cherish and enjoy your "unicorn".
 
XS650-J / 1981 taking into consideration frame #
Mikuni BS38 (should be BS34 for this year)
And......the carbs do appear to be later model BS38's. So, they will likely correspond to '78-'79 US model carbs (2F0 p/n's) and have similar specs. The internals, such as the needle jet & needle number, would confirm that.
 
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Gentleman, thank you all for support and nice words.
The bike when I bought her was not running, but in very good shape, all oryginal, wind shield, any part taken away to assembly frame for Hepco Becker bags, which are with the bike as well, waiting in a box, some extra rack, new rims and exhaust. I rebuilded carbs and she's going to ride soon.
Not sure at the moment, if I will keep the Hepco Becker pipes on the bike. This is only 30minute job to come back to full original XS, which is what I really like with all my bikes.

Isn't she lovely? 😉
 

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You vin# would be good to see. If you dont want to post the whole thing the prefix letter/#'s and the first 3# will be enough


The Brochures in the post above are for a European country and the front forks have what the Euro model had with twin from disk brake that have the smaller brake rotors, (same size as the specials rear brake rotor and on some other XS models) which also means the front forks are specific to the Euro models because of small front rotor the caliper mount are lower on the forks'

35mm forks US Euro copyright.jpg


Japanese also had a standard model for 80/81. Difference is their bike had a single front disk brake and B34's. This model i referenced on all the X650 sites and ID chart where the Euro 80/81 standard doesn't get a mention.
Japanese 4E3
Yamaha TX650 80.jpg
Yamaha TX650 80 8200408B2013121900200.jpg
 
By the way, Welcome and the bike is a rally nice example. The mufflers look to be aftermarket, (going off the manufacturing stamp on the rear top). Found a set of those pipes on Fleecebay for a friend 76 and when he put them on he was pleased with the overall performance. Changing the mufflers will take its originality away. They may not be factory but they are original style
 
Hi All,
I am new into XS650 world, not necessarily new to oldtimers/vintage bikes, and wanted to say Hi to the community.
I posted some carb question on XS650 fb profile and due several questions, Joe advised to switch here and present my bike, asking for your experience regarding the model/parts applied, etc.

Here is bike:
Looks all original, not reworked, below 100k km, all part fits very well.
I have all documentation back to May 1981 when this was first registered in Germany.
Compression - great.
XS650-J / 1981 taking into consideration frame #
Mikuni BS38 (should be BS34 for this year)
Left engine cover looks like "Special" models with oil level window.
Point ignition (expected to see electronic).

Now working on carb adjustment, right cylinder seems does not receive mixture, but all vacuum, gas lvl, mixture are all set. Plan to go thru the std checklist to see what is going on.

Comments and experience would be appreciated.
Welcome!
 
You vin# would be good to see. If you dont want to post the whole thing the prefix letter/#'s and the first 3# will be enough


The Brochures in the post above are for a European country and the front forks have what the Euro model had with twin from disk brake that have the smaller brake rotors, (same size as the specials rear brake rotor and on some other XS models) which also means the front forks are specific to the Euro models because of small front rotor the caliper mount are lower on the forks'

View attachment 239223

Japanese also had a standard model for 80/81. Difference is their bike had a single front disk brake and B34's. This model i referenced on all the X650 sites and ID chart where the Euro 80/81 standard doesn't get a mention.
Japanese 4E3
View attachment 239220View attachment 239221
This is 447 460 xxx
 
Ok, so it looks I have some more data.
Exhaust is OEM Yamaha
Engine #is 447-46???
The bike is running now on both cylinders, but... need to replace pilot jets, but frankly do not know the part number, size, naturally I do not know the specifics of the carb, which is Mikuni BS38, but maybe there is some additional number to recognize it.
Wish you a nice day 😊
 
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