Introducing Me and my 1983 Heritage Special Restoration

[Keyxs]

Awesome info Guys!
Found and ordered a pair of alloy carb tops!
$20 shipped.
Will look at that Carb mod when I am rebuilding!

Put nearly an hour into scraping the float bowl gasket off the LH carb body... Absolutely the first time in my life I’ve wished for a smaller tool....
I think I got it all done now.

 

[Keyxs]

So, as I make my list of parts I'm gonna need as I go along....
So far I've added
1/ Butterfly screws....Cant seem to find them at reasonable cost!
2/ Replacement plastic fuel feed T piece... is there an batter alternativenow... found a thread about a brass one, but they leak?
3/ Electronic ignition... what is best?

 

[Keyxs]

Got the RH carb stripped and first pass blasted yesterday.
A little more detail to do, but looks good.
Question:
What exact carbs do I have here, and where should I get a comprehensive build kit from?
The needles and jets are gummy but I think a good soak in cleaner might do, I have a rack of small brushes and jet cleaning tools.
Feel I should replace the floats(one looks like it’s cracked) float inlet, vacuum diaphragms etc. I see Mikes has a deluxe kit but don’t know if I need all the various jets etc.

Anyway, here’s Carb 2.

 

[gggGary]

Prolly just a oversight in the pics, but you do remove clean the needle jet, aka emulsion tube..
Nice cleaning!
I'm real fond of making little scrapers cleaners out of the stainless steel strips from windshield wipers. Easy to bend grind file yet they hold their shape and hold an edge.
Every bench has a collection of them ground and bent for special uses. One of these ground with a narrow scraper end is perfect for those float flange tight spots around that raised bead. the other end gets a triangular finger hold, hanging hook.

 

[Keyxs]

Brass jet in the center of the last pic?
I dont know how it comes out!

 

[gggGary]

AHA! LOL Yes careful tapping with a flat faced drift small enough to miss the locating pin in the body sends it out the "top" into the bore. It's always in need of clean up and the small cross holes carefully cleared.

 

[Keyxs]

Will do it today on both.
#2 Carb needs a detail going over yet, I still see black paint and gasket residue in the nookes and crannies...
Its like that old saying, 95% takes 5% of the time, but that last 5% takes 95% of the time!

 

[gggGary]

Those cross holes are where air taken from from the intake bell gets added to the gas getting pulled through the main jet and turns it from a liquid into a frothy, easily burned emulsion.

 

[5twins]

Yes, I was going to mention the needle jet needs to come out. Also the pilot jet. And you'll need new rubber caps for over the top of the pilot jets .....

For rebuild kits, I like these because they come with not one but two adjustable needles to experiment with. What they don't contain are the pilot jet rubber plugs but those can be found elsewhere, like on eBay .....

https://www.cruzinimage.net/2017/07/26/80-81-yamaha-xs650-carb-repair-kits/

Here's what the needle jets look like. The little holes down the sides that Gary mentioned are often plugged .....

 

[gggGary]

Note the main jet and brass washer are what retain the needle jet in the body.
One pic still has the washer in place, the other doesn't....

 

[5twins]

Yes, that washer is very important. The main jet alone won't hold the needle jet in, it's diameter is too small.

 

[Keyxs]

Got one of the emulsion jets out, and will do the other tomorrow.
Glad I did, as I see gunk in there.
No kidding about the fine holes in that sucker.
As far as the other jet, in the shorter tower forward, I now have them both out.
Not sure if it’s a model thing, but those towers did not have any kind of bung or rubber plug in them. I think there was a brass jet on top. See pic in post 44? Maybe I’m confused!
I am wondering if there is any other jets or passages that need attention?
Please shout up

I’m also looking at the scuzzy piece of steel angle iron that ties the two Carbs together...
it’s rust and kinda ugly too. Think I could use a piece of aluminum angle rather than waste time powder coating it?
Maybe add some lightness...
Cos I like detail.... like these braces I made for the Vapor blast cabinet...

Or maybe that would be....

 

[Keyxs]

Ha. I just noticed how much that high compression Alfa Piston resembles a XS650 piston.... just supersized!

Almost finished vapor blasting a spare Alfa head. very happy with the results.

 

[Keyxs]

Shoot!
Now I see what you meant about the washer!
Its probably in the sump of the Vapor Blaster now!

 

[gggGary]

Got one of the emulsion jets out, and will do the other tomorrow.
Glad I did, as I see gunk in there.
No kidding about the fine holes in that sucker.
As far as the other jet, in the shorter tower forward, I now have them both out.
Not sure if it’s a model thing, but those towers did not have any kind of bung or rubber plug in them. I think there was a brass jet on top. See pic in post 44? Maybe I’m confused!
I am wondering if there is any other jets or passages that need attention?
Please shout up

Looks like a pooched out rubber plug to me.
they all get that angle you can see smooshed in up at the top, a tit in the float bowl pushes there to keep the plug in place.
Anyways rubber plug goes there in all years models XS650 BS34 carbs.

 

[timbeck]

Keyxs--Ya got to love dimple dies......

tim

 

[Keyxs]

Yes indeed!
Sadly, the smallest one I have is 1/2” and it will be too big for the carb rail.... but I have an idea.... or two...
There is no way this POS is going back on regardless.

So, the Die Cast XS750 Carb tops arrived today...
Nice enough, but looked like they had been shot with some clear...
That wasn't gonna work, so popped one in the cabinet for some love....
Ive been playing with some courser media today, so that one got some 80 grit love.
It waved by-by to that clear real fast..
They are both gonna need a bit more TLC and some casting makes and blobs knocked down...

 

[5twins]

That vapor blasting really cleaned those carb tops up nice, but a little buffing will really make them shine. That's all I buff on the carbs is the tops, the rest of them just get cleaned. I think it stands out nicely in relationship to the rest of the carb .....

 

[Keyxs]

Looks great.
Not sure I want to do polished finish tho.
Did the second one then With 80g then hit it with the finer mix....

 

[Keyxs]

Question:
Am going thru my boxes of parts and found this peacock that was on the tank
Replace or rebuild?