Boorrrringggg Build/Rebuild/Refres&restore

[puskrat]

Thanks for confirming. i hate to be anal about stuff, but after the stern warnings regarding K&L jets, I've come to expect no good from anything they make.

[DiverRay]

I would get the Mikuni needles! IF you look at the K&L, you will probably find each needle's spring pushes at a different rate. This is NOT what you want. Go with the viton tip Mikuni needles and use the K&L seats, or return the jetsrus parts and just get needles and use the mikes seats. Big thing is ONLY the Mikuni Needles and jets.

[puskrat]

ugh. My jetsrus float valve assemblies are K&L. I've learned to consider that profanity. Dare I put them to use?

I ended up doubled on float valves, as I got the carb kit from mikes, rather than just gaskets. Haven't ID'ed their manufacture yet.

[puskrat]

That is fine, the only model to have 2 different types was the 79 Special. Not a worry.

ROCK AND ROLL then

[bikerphil]

I'll be reinstalling four identical 266/X-2 needle jets

That is fine, the only model to have 2 different types was the 79 Special. Not a worry.

[puskrat]

parts are in! yesterday my Genuine Mikuni pilot and main jets arrived from partsreloaded, my gaskets came in from mikesxs, and I 'spect I'll see my new float needle ass'lies (jetsrus) first of the week. I'll be reinstalling four identical 266/X-2 needle jets unless someone can fill in the mystery with the part number and a source on the other tubes. My carbs are 79s, in which specs call for different needle jets in the interior carbs than the exterior. I'm willing to put them back in because the bike is claimed to have been running as is at one time, and because the "jets for cooling" solution was abandoned by Yamaha anyway. Somebody stop me if I'm being crazy.

[puskrat]

My advice on the corn cob media is do not do it.
If your eyesight is bad enough that you can't see into the little holes as is, then you will miss the little pieces o cob that will get into the little holes. And once they get wedged in, they are a booger to get out.
Get a magnifying glass and a strong light bouncing off a white surface, (piece o paper), and you should be able to see light through all the holes, except the ones in the bowls and the air jet. Compressed air through the passages will tell you that they are clean. I squirt some solvent into the passage, then apply air, and when the mist comes out the other end of the passage like a spray gun, I figure it is clear.
One of the beauties of these bikes is that most faults are revealed by a GOOD visual inspection.

CZ

Thanks Cap

[puskrat]

Shell case tumbler highly NOT recommended.........that comes from an avid reloader.........and carb rebuilder.

Glad to know
thanks so much

[motoman]

Final disassembly: Just pulled the last of the floats/pins/needles. (Yes, I went out of order, but I had a reason) You, faithful reader, will remember my left petcock was leaking when I disconnected it from the fuel line, that that same valve was largely disintegrated when i disassembled it, that my right side bowls bowls were tough to pull off, slides three and four were bound up, and that i had gasoil way back at my first oil change last summer. No surprise that number four float needle had to be pried out with a needle nosed plier. it seems to be cleaning up okay so far, but I'll be replacing it. IF I can find a part number. So far I've tried three sources: jetsrus, mikes, and partsreloaded. No one shows a seat speced for a BS34, but jets has a pretty detailed chart of options....perhaps a matching part. Anyone have a link?

As for three more bowl needles/seats: i want to get everything sparkly clean. These are tiny parts with teensy bits. I can soak things in carb bowls, scrub them with teethbrushes, rinse them in more carb cleaner, etc. I am not confident visual inspection will find all the crud. I don't have a sonic cleaner, and i don't want to heat any solvents. has anyone tried tumbling undelicate things like float needles and main jets in corn cob? I've a loaded a rotary tumbler up for polishing brass cartridge cases, and have been mulling over it's applicability for this carb work during the whole process. I see limitations as to WHAT could be polished this way, but no reason thus far not to try it for the smallest, sturdiest items. Thoughts?

and another ask.....does the gineuine Mikuni only rule applicable to float needle assemblies also? Anyone used mikesxs's replacements?

Shell case tumbler highly NOT recommended.........that comes from an avid reloader.........and carb rebuilder.

[CaptonZap]

My advice on the corn cob media is do not do it.
If your eyesight is bad enough that you can't see into the little holes as is, then you will miss the little pieces o cob that will get into the little holes. And once they get wedged in, they are a booger to get out.
Get a magnifying glass and a strong light bouncing off a white surface, (piece o paper), and you should be able to see light through all the holes, except the ones in the bowls and the air jet. Compressed air through the passages will tell you that they are clean. I squirt some solvent into the passage, then apply air, and when the mist comes out the other end of the passage like a spray gun, I figure it is clear.
One of the beauties of these bikes is that most faults are revealed by a GOOD visual inspection.

CZ

[puskrat]

one more yes sir. left it off

[puskrat]

yes sir
yes sir
and yes sir.

Let's put this mess to bed.

[DiverRay]

Order 4 of these:

http://www.jetsrus.com/individual_parts/KL_18_4652.html

Don't bother trying to clean the old needles!
These are for the '78-79 carbs.
Here is the page I got the numbers from:

http://www.jetsrus.com/needle_valve_float_bowl_gasket/needle_valve_and_float_bowl_gasket_yamaha_street.htm

pick year from here:

http://www.jetsrus.com/a_jet_kit_street/a_jet_kits_street_selection.htm#yamaha

Carb jets from here. Remember, ONLY genuine Mikuni!!!

http://www.jetsrus.com/a_jet_kit_street/yamaha_1100_XS1100_1978.htm

These are for the '78, '79 will be almost the same.

[puskrat]

"reloading" for carbs?

Final disassembly: Just pulled the last of the floats/pins/needles. (Yes, I went out of order, but I had a reason) You, faithful reader, will remember my left petcock was leaking when I disconnected it from the fuel line, that that same valve was largely disintegrated when i disassembled it, that my right side bowls bowls were tough to pull off, slides three and four were bound up, and that i had gasoil way back at my first oil change last summer. No surprise that number four float needle had to be pried out with a needle nosed plier. it seems to be cleaning up okay so far, but I'll be replacing it. IF I can find a part number. So far I've tried three sources: jetsrus, mikes, and partsreloaded. No one shows a seat speced for a BS34, but jets has a pretty detailed chart of options....perhaps a matching part. Anyone have a link?

As for three more bowl needles/seats: i want to get everything sparkly clean. These are tiny parts with teensy bits. I can soak things in carb bowls, scrub them with teethbrushes, rinse them in more carb cleaner, etc. I am not confident visual inspection will find all the crud. I don't have a sonic cleaner, and i don't want to heat any solvents. has anyone tried tumbling undelicate things like float needles and main jets in corn cob? I've a loaded a rotary tumbler up for polishing brass cartridge cases, and have been mulling over it's applicability for this carb work during the whole process. I see limitations as to WHAT could be polished this way, but no reason thus far not to try it for the smallest, sturdiest items. Thoughts?

and another ask.....does the gineuine Mikuni only rule applicable to float needle assemblies also? Anyone used mikesxs's replacements?

[puskrat]

Try reading the first part of this. The pics and arrows show the jets and how to find them.http://www.xs11.com/forum/showthread.php?t=36017
Let me know if you need any other pics!

thanks ray. thats the thread/tip I refer to as 101. Tis how I found the main, pilot, pilot air and needle jets, and also the whole disassembly procedure. irreplacably valuable.

on to topcat's post: after I figure that out I'll try to apply it, but I think two answers are: 1. the brass tube is not the start jet,and 2: i dont need to order/replace start jets.