Carb Nozzle & Needle Part Numbers

[WMarshy]

The following are Yamaha part numbers for carburetor main nozzle and needles broken down for all years of the XS and XJ models. I included the pilot screw number (the idle mix screw everyone breaks the tip on) on earlier models but the later models do not show it in the microfiche... I assume they are the same throughout but have no evidence of that.

1978 XS 1100 E
Main Nozzle: 2H7-14941-02-00
Needle: 2H7-14116-06-00
Pilot Screw: 2AZ-14923-00-00

1979 XS 1100 F
Main Nozzle: 2H7-14941-02-00
Needle: 2H7-14116-06-00
Pilot Screw: 2AZ-14923-00-00

Yamaha Microfiche did not list the 79SF, I will assume it is the same as the '79F unless otherwise told different.

1980 XS 1100 G
Main Nozzle: 3H5-14941-02-00
Needle: 360-14116-07-00
Pilot Screw: none listed

1980 XS 1100 SG
Main Nozzle: 3H5-14941-02-00
Needle: 452-14116-16-00
Pilot Screw: none listed

1980 XS 1100 LG
Main Nozzle: 3H5-14941-02-00
Needle: 452-14116-16-00
Pilot Screw: none listed

1981 XS 1100 H
Main Nozzle: 3H5-14941-02-00
Needle: 360-14116-07-00
Pilot Screw: none listed

1981 XS 1100 SH
Main Nozzle: 3H5-14941-02-00
Needle: 360-14116-07-00
Pilot Screw: none listed

1981 XS 1100 LH
Main Nozzle: 3H5-14941-02-00
Needle: 452-14116-16-00
Pilot Screw: none listed

[WMarshy]

If anyone has or knows the markings on the needles or nozzles please share (example: 5GL16 for the needle, 300FJX-2 on the tube).

Keep in mind, there may be more than one tube used on the same year bike. For example, I know with snowmobiles you can get richer or leaner main nozzles and they might look like 300FJX-1, 300FJX-2 and 300FJX-3... keep it in mind as the data comes in. Just trying to build a database of sorts.

Please be sure to include what year/model the parts/carbs came from. If you are not sure please say so! Thanks.

[WMarshy]

'78E and '79F (possibly '79SF) Needle: 2H7-14116-06-00: 5GZ6


'80G, SG, LG & '81H, SH, LH Main Nozzle: 3H5-14941-02-00: 300FJX-2


'80G & '81H, SH Needle: 360-14116-07-00: 5GL16

[bikerphil]

The 79SF uses the same nozzles in carbs 1&4 as the E and F, but carbs 2&3 use a nozzle with less air bleed holes for a richer mixture for better cooling. I don't think it would be necessary to manufacture those, the E and F nozzles should be fine for the 79SF across the board. The needle for the 79SF should be the same as the E and F models.

[motoman]

'78E and '79F (possibly '79SF) Needle: 2H7-14116-06-00: 5GZ6


'80G, SG, LG & '81H, SH, LH Main Nozzle: 3H5-14941-02-00: 300FJX-2


'80G & '81H, SH Needle: 360-14116-07-00: 5GL16

5GL16 was used on Special only in 81 The Standard used a longer taper needle which was PART of reason for the 2 step increase in main jetting. I don't have that number handy at the time, but irregardless in among the unobtanium for any replacement. Easiest option is the still available 5GL16 combined with 110mains(GenuineMikuni) all across.

[WMarshy]

5GL16 was used on Special only in 81 The Standard used a longer taper needle which was PART of reason for the 2 step increase in main jetting. I don't have that number handy at the time, but irregardless in among the unobtanium for any replacement. Easiest option is the still available 5GL16 combined with 110mains(GenuineMikuni) all across.

Thanks for the info. According to Mother Yamaha the part number for the needle on the '80 G, '81H and SH are the same so I thought they were the same. If you come across the numbers let us know. Thanks.

[crazy steve]

There's a lot of confusion over these....

Yes, according the parts fiche the G, H, and SH all use the same needle. Depending on how you read the FSM, that may be true; the manual is less than crystal-clear.... While I would consider the FSM as the 'bible', there are mistakes in it, this could be one of them.

Again, according the parts fiche, the SG, LG, and LH use the same needle.

So, which is right? I know Moto found one type in his, but others have reported the 'other' needles, so I suspect mother Yamaha may have been a bit sloppy about which carbs got installed on which bike. Throw in the 'service parts' vs assembly line installed parts (which may or may not be identical), plenty of room for 'windage'.....

[WMarshy]

The interesting thing will be to get them all measured up on the optical comparator and see how they differ from one another.

JAT, I wonder if the Euro models have different needles... I wonder if they've ever documented these details...

[WMarshy]

If anyone is willing to lend me a 5GZ6 Needle and a Nozzle (still not sure what the markings are) from a '78 or '79 then please PM me. I would like to send my source one of every kind so he can make a batch of each one. PM me for details. Thanks.

[motoman]

There's a lot of confusion over these....

Yes, according the parts fiche the G, H, and SH all use the same needle. Depending on how you read the FSM, that may be true; the manual is less than crystal-clear.... While I would consider the FSM as the 'bible', there are mistakes in it, this could be one of them.

Again, according the parts fiche, the SG, LG, and LH use the same needle.

So, which is right? I know Moto found one type in his, but others have reported the 'other' needles, so I suspect mother Yamaha may have been a bit sloppy about which carbs got installed on which bike. Throw in the 'service parts' vs assembly line installed parts (which may or may not be identical), plenty of room for 'windage'.....

Just saw your post. The 80-81 Standards had a bit longer needles with amore gradual taper than the shorter quicker taper needles that came stock in the same year Specials. This resulted in the main jetting differences between the two models also. I can tell you from decades of riding my Venturer, that now having the Special carbs on it, it is VERY sensitive at the throttle cruisin' slab speeds and a dip that may cause a bit of movement at the throttle is definitely felt. Where as when it had the Standard carbs on, that sort of thing was unnoticable. That was Yammies intention......the Venturer to be the lumbering tourer and the Special to be the 'bar-hopper' with its quick throttle response. Runnin' at constant highway speeds also leans motor out,plus the Venturer was expected to be packin' more weight, so that was also the reason for the 2 step increase of main jets for the center two cylinders.

[WMarshy]

I finally got around to pulling my carbs so I can send the emulsion tube, main needle and idle screw to my contact for machining.

The numbers on my emulsion tube were very clear 266 X-2 on my '79F.

The interesting thing is Mikuni put their logo after 266 but in front of the X-2 designation. This discovery makes me believe with certain the other later tube ('80 specials with the 300 tube) in question in the above discussion is designated as 300 (logo) X-2. No other letters in between like previously discussed in this thread...

'78E and '79F (possibly '79SF) Needle: 2H7-14116-06-00: 5GZ6


'80G, SG, LG & '81H, SH, LH Main Nozzle: 3H5-14941-02-00: 300FJX-2


'80G & '81H, SH Needle: 360-14116-07-00: 5GL16

Next update should be quantities of parts being machine and maybe prices.

One noteworthy thing, the 5GL16 main needle with be machined with slots in the upper end so that you guys can adjust F/A ratio by moving the circlip up or down like on the '78-'79 needles.

[WMarshy]

Just for clarification, parts to become available should be as follows:

Fits Models E, F, SF:
5GZ6 Main Needle
266 X-2 Emulsion Nozzle
Idle Mix Screws

Fits Models G, SG, LG, H, SH, LH
5GL16 Main Needle (with added adjustment slots)
300 X-2 Emulsion Nozzle
Idle Mix Screw

[Schming]

This may or mayn't interest you in your endeavor, but the stock '80G's jet needles are 51Z7

These 51Z7 needles are used in the '80G & '81H and are a long thin taper as mentioned above.

The SH used 5GL16 jet needles.

The table in the third post of the thread below, I have found to be accurate.

http://www.xs11.com/forum/showthread.php?t=35671

[WMarshy]

This may or mayn't interest you in your endeavor, but the stock '80G's jet needles are 51Z7

These 51Z7 needles are used in the '80G & '81H and are a long thin taper as mentioned above.

The SH used 5GL16 jet needles.

The table in the third post of the thread below, I have found to be accurate.

http://www.xs11.com/forum/showthread.php?t=35671

If anyone has a 51Z7 Main Needle they wouldnt mind lending out let me know. Thanks for the info.

[Schming]

While rebuilding my '80G's carbs I bumped the work bench and two of the slides fell to the floor almost hair pinning the jet needles

I scanned ebay for a couple years for the needles to no avail.

Finally got my carbs together last year about this time and very gingerly straightened my original needles to the best my eyes and magnifying glass could see.

Sorry I can't lend you one from my set, BUT there is 4 on ebay that I've been watching for a while now:

http://www.ebay.com/itm/291026079602...9#ht_359wt_880