So ...need a bit of direction-was carbs, not coil pick up

[Appie]

Jonny I’m going through a carb rebuild for the same reason as you, leaking petrol into the airbox. Looking at jetsrus I’m unsure which is the correct O- ring for the main jet. Is 9.1x1.3 corrrect?

Thanks all for an amazing forum. I’d be lost without you guys!

[Appie]

Nope! I think this is the correct needle valve seat Oring?

BSR-36 Float needle valve seat

7.5mm I.D. x 1.53 mm

[Schming]

Both you guys with leaky carbs want to make sure the oil in the crankcase didn't get thinned out from excess fuel spillage.

[JonnyO]

Both you guys with leaky carbs want to make sure the oil in the crankcase didn't get thinned out from excess fuel spillage.

Smelled fuel. Not taking that chance.

[jetmechmarty]

"Has anyone a source for OEM?"

Yup! (^_^)

OaR at leat I thimk I do.... (O_O)

https://www.jetsrus.com/

Jets-R-Us is a good source, just make sure you're purchasing OEM brass. They also offer aftermarket carburetor parts.

Nice Cycle Supply is another good source. Genuine Mikuni Replacement Parts and Tuning Components

Here's another gold mine. The 1980-1984 XS650 have BS34 carburetors very similar (not the same) as on the XS11. In the link you will find all kinds of goodies such as o'rings, fasteners, and Suzuki branded parts that are identical to Yamaha at a better price.

(11) The great o-ring, seal, gasket, nut, bolt, sizes used on the XS650 thread. | Yamaha XS650 Forum

[Larrym]

Not taking that chance.

Yay! \(^_^)/

FWIW? (*′☉.̫☉)

Iffin yur feeling a bit reluctant to do a total tear down, clean, rebuild, adjust, install, and RE-adjust a set 4 (fower...) Mikuni BS-34 Constant Velcity CaburatatorZ??! ヾ(ﾟдﾟ)ﾉ゛

Then imma gonna say there's prob'ly a good reason on yur side of thingz. (／。＼)

I means, ya don't R E A L L Y knows what yur in fOaR and wut to expect OaR DO as it's a "first time thru the Gate" scenario. Iffin that's the case then I heartily recommend you DON'T. Just DON'T. ε=┌(;･_･)┘

There's only so many of these carb banks left and nobody wants to see the bank (and therefore the entire bike...) useless cuz of ruining one....just ONE carb body due to being HAMHANDED 'bout removing a float post, jamming the wrong size screwdriver into the pilot air jet hole and cracking the horn, OaR boogering up the idle fuel screw tip/hole. (－‸ ლ)

I would totally support you taking NO action at all considering at this moment yur deciding NOT to do anything cuz you KNOW that you DON'T know wut you NEED to know. (︶︹︺)

BefOaR making a final decision to act OaR not to act? (O_o)

You might find the following useful-

https://xs11.club/forum/repairs/carb...b-cleaning-101

https://xs11.club/forum/repairs/carb...-1980-81-carbs

This video channel has the mostest detailed and useful videos in this area that I've EVER seen and I've used them as my own guiding light.-

https://www.youtube.com/@Steptoexs11/videos

Know befOaR you go.... ( ﾟ_ゝ｀)


OaR DON'T go if that ends up being the case. ¯\_(°_°)_/¯

[JonnyO]

Jets-R-Us is a good source, just make sure you're purchasing OEM brass. They also offer aftermarket carburetor parts.

Nice Cycle Supply is another good source. Genuine Mikuni Replacement Parts and Tuning Components

Here's another gold mine. The 1980-1984 XS650 have BS34 carburetors very similar (not the same) as on the XS11. In the link you will find all kinds of goodies such as o'rings, fasteners, and Suzuki branded parts that are identical to Yamaha at a better price.

(11) The great o-ring, seal, gasket, nut, bolt, sizes used on the XS650 thread. | Yamaha XS650 Forum

The 650 is my favorite bike of all time. ( don't tell 1100 gurus! )
From commiefornia to Louisianer it was a great steed to me.

[JonnyO]

Yay! \(^_^)/

FWIW? (*′☉.̫☉)

Iffin yur feeling a bit reluctant to do a total tear down, clean, rebuild, adjust, install, and RE-adjust a set 4 (fower...) Mikuni BS-34 Constant Velcity CaburatatorZ??! ヾ(ﾟдﾟ)ﾉ゛

Then imma gonna say there's prob'ly a good reason on yur side of thingz. (／。＼)

I means, ya don't R E A L L Y knows what yur in fOaR and wut to expect OaR DO as it's a "first time thru the Gate" scenario. Iffin that's the case then I heartily recommend you DON'T. Just DON'T. ε=┌(;･_･)┘

There's only so many of these carb banks left and nobody wants to see the bank (and therefore the entire bike...) useless cuz of ruining one....just ONE carb body due to being HAMHANDED 'bout removing a float post, jamming the wrong size screwdriver into the pilot air jet hole and cracking the horn, OaR boogering up the idle fuel screw tip/hole. (－‸ ლ)

I would totally support you taking NO action at all considering at this moment yur deciding NOT to do anything cuz you KNOW that you DON'T know wut you NEED to know. (︶︹︺)

BefOaR making a final decision to act OaR not to act? (O_o)

You might find the following useful-

https://xs11.club/forum/repairs/carb...b-cleaning-101

https://xs11.club/forum/repairs/carb...-1980-81-carbs

This video channel has the mostest detailed and useful videos in this area that I've EVER seen and I've used them as my own guiding light.-

https://www.youtube.com/@Steptoexs11/videos

Know befOaR you go.... ( ﾟ_ゝ｀)


OaR DON'T go if that ends up being the case. ¯\_(°_°)_/¯

Awesome! TY! :-D

[JonnyO]

I'm going to take a shot when I get the o-rings for the needle jets... at just replacing those... and see what I get.

[JonnyO]

Nope! I think this is the correct needle valve seat Oring?

BSR-36 Float needle valve seat

7.5mm I.D. x 1.53 mm

Hope so. Ordered 4.

[bikerphil]

I only use the genuine Yamaha on those seat O-rings, P/N 8F2-14147

Soak the hell out of those seats with penetrating oil before trying to pull them out. I've even needed to heat them with a torch to remove them before. Be careful of the float posts.

[JonnyO]

I only use the genuine Yamaha on those seat O-rings, P/N 8F2-14147

Soak the hell out of those seats with penetrating oil before trying to pull them out. I've even needed to heat them with a torch to remove them before. Be careful of the float posts.

I'll get 'em from Partzilla, then. I will take a look at the carbs ( open 'em up ) soon. WD-40 okay as a penetrating oil? I have heat gun, I guess, if necessary. I'm guessing you had to use heat because they were rock hard and wouldn't budge?

[bikerphil]

Get som PB blaster or equivalent, WD40 is just a mild lubricant. Yes, the heat will soften the hardened rubber. Don't bugger them up with a pliers, go carefully and again, be careful of the posts, one slip and you know the rest.

[DiverRay]

Jonny0, I rode an XS1B from California to North Carolina in 1974. I had 7 days to report for duty at Ft. Bragg. One of my all time best rides.
Now that I'm 70, the XS1100 will get me around in comfort without the extras the 650 added.
Every State has good and bad parts to it. On a ride, we try to stick with the good parts or roads. Cal. has highway 1 North of San Francisco, Arkansas has their highway 9, and so many more!

[LAB3]

Nope! I think this is the correct needle valve seat Oring?

BSR-36 Float needle valve seat

7.5mm I.D. x 1.53 mm

That translates to a JIS (Japan Industry Standard) S8 o-ring, meaning it's a common standardized size (JIS S8) Many auto parts stores keep assortments of single orings behind the counter, they're all over the place in systems that use fuel injection and are labeled by they're standardized size.

Long and short of it, head to an auto parts store and ask if they have single orings and ask for a JIS S8 o-ring, probably won't cost more than some pocket change.