Carb bodies

[planedick]

I have a perfect set of carb bodies labeled 3J6 ('80 special?) and want to know if there is any difference between the US and Canadian models? Maybe some super guru knows?????

[Crazcnuk]

Fun part is that I have a set of 3J6 carbs on my '80G, but we pretty much determined that they came off of a Special.

My '80 Special, however has 3U9 series carbs. The only difference I noted, w/o having them side by side, is that the float bowls have a different drain system.

The 3J6 bowl drain comes out the bottom pointed straight down and the 3U9 drain comes out to the side.

Both use the plastic floats, no rubber plugs, 110 mains, 45 pilots, 185 air jet, and push in float seats.

[red bandit]

Sounds like you have an 80 carb (drain bolt vertical) and an 81 (drain screw horizontal). All parts will swap. Unless there is something diff. about a Canadian model but I don't think there is.

[DGXSER]

FYI, my stock pilots are 42.5 and not 45.

[Crazcnuk]

Mine may be 42.5 as well, That is what they are supposed to be, but the ones in my other carbs were 45's, I don't know why.

I have mains, pilots, etc up the ying yang, so that isn't an issue.

[bikerphil]

the ones in my other carbs were 45's, I don't know why.

Some of us put 45 pilots in to, you know, "soup 'em up".

[Crazcnuk]

Well, 45 pilots doesn't 'soup' anything up unless your running really big mains.

However, rather than hijacking this thread, you can see the work we did on this here:

http://www.xs11.com/forum/showthread...ight=find+cure

[Crazcnuk]

I think the float bowls may be off of an older series of carb (79?) as these bowls have the little bump for holding the rubber plug in the pilot tube, but these carbs are not cross drilled.

[planedick]

Pic

Here's what they look like....

[Crazcnuk]

Saw that picture over in the buy/sell area.

I meant the float bowls I have on my carbs, with the side exit drain, look to be late 79 or early 80.

I think that is when Yamaha used the cross drilled pilot tower with rubber plugs?

[planedick]

Float bowls

These carbs had such float bowls, but there was only two and I sold the other. These had plastic floats, push in needle valve seats with yoke & screw retainer and no rubber plugs.

[DGXSER]

look identical to my 81 special carb bodies.

[XSPastor]

ditto

look identical to my 81 special carb bodies.

They look like my 81 special carb bodies too.