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Hey gents,

I'm at work and won't get to rip into the bike til tonight but I want to make sure my thinking is straight before I begin.

1. I'm popping on decel through the pipe. So I've been told to turn my pilot airs out an eighth (by DRJim, quite a while back). I wasn't too concerned about it before, but I cleaned my air filter the other day and the popping seems worse (which would make sense with more air flow).

2. My riding buddy told me I'm putting out black puffs when I get on the gas. So I'm thinking my emulsion tubes are worn out and I should hop on the group buy while I can.

Does my line of thinking make sense? A bit too lean from the pilot airs on decel but rich everywhere else on accel? I've never heard of having both conditions simultaneously.

The bike makes great power all through the rev range, pulls well from idle, and idles smoothly.

I gotta pull the plugs tonight, but if I'm headed in the wrong direction I'd sure appreciate a slap.

Running a slip-on with K&N filter (stock airbox).

gEt ThE tOoBs DuDe!!!

sorry about that.... I was just talking to a surfer a moment ago....

LOL, so Tim, does that mean you think I'm right, or that I need to catch some tasty waves?

If you have more than about 15,000 miles then yes, I recommend replacing the EmulsionTubes. With that being said, I still have yet to do mine and I got them this time last year (I'm a slacker). I have the same issue with the black puff on hard acceleration.

I have since purchased a set of 95 carbs that I'm going to rebuild with the new tubes and one of the 3 (2 FactoryPro, and 1 DynoJet) jet kits that I have. The reason for doing it this way, is I will have one set that is known good to run the bike. Once I get the rebuilt set tuned properly, I can the rebuild the original set.

I seem to be like several other members on the board. Grabbing spares where I can for as little $ as possible, but sometimes it costs (like my trans).

FZRDude wrote:If you have more than about 15,000 miles then yes, I recommend replacing the EmulsionTubes. With that being said, I still have yet to do mine and I got them this time last year (I'm a slacker). I have the same issue with the black puff on hard acceleration.

So I get the feeling this is something I could blow off for quite a while? Not that I'm going to, but it's good to know. I should do the group buy. They are all the same tubes? 38mm Mikuni's all have the same ones?

Blaine wrote:So I get the feeling this is something I could blow off for quite a while? Not that I'm going to, but it's good to know.

I have and I should really get to getting it done.

Blaine wrote:I should do the group buy. They are all the same tubes? 38mm Mikuni's all have the same ones?

As far as I know, they are all the same from 89-95. Yes, get in on the group buy, you will not find a better price.

Blaine wrote:LOL, so Tim, does that mean you think I'm right, or that I need to catch some tasty waves?

Like totally tubular man...

Hmmm, maybe not the same emulsion tubes. FP's website says specifically that the are for YZF750's & FZR1000's but not Thunderace??

Aaarrrgggghhhh..... I forgot that you have the 97 YZF1000. I'd still give Marc a call over at FactoryPro and see what he has to say.

OK, the first pic is of the FZR carb. Emulsion tube is #32, right?




This pic is the YZF1000. Am I high? I can't find the tube!!

I was goning to say #9, but it says that it is a cap for $8 USD, so that aint it. I looked up the parts list and it may be #24

4SV-14112-00-00 .VALVE, THROTTLE 1 $36.40 each

Yeah, those were the 2 part #'s that jumped out at me, but I really don't have a clue. The similar part on the fizzer is listed as diaphram assembly #18, but on the YZF it appears as 2 separate parts???

The more I look at it, #24 looks to be the slide, so I doubt its that either. Well, you could disassemble your carbs and send the tube out to FactoryPro and say "Hey?!? Got one (4) of these? How much?"



.....but that would mean being without your ride for a couple of weeks.

Or call the Dealer and make them find out what the P/N and cost is.

Well, I called FP but Mark wasn't in. The guy I talked to says the YZF1000 came with 2.5's versus the 3's in the Fizzer. They don't have the ones I need.

Both Yami dealers are closed today.

Yamaha dealer says the emulsion tubes aren't available by themselves. Says I would have to purchase the WHOLE CARB???

Oops.... or should that be Ouch....

Take a look at page 249 (Section 6, pp 8) in the YZF1000 manaul on the downloads page. I think it is referred to as the main jet holder.

http://www.exupbrotherhood1.com/brother ... manual.pdf

Also look at the Haynes, YZF750/1000 Manual, Section 4 pp 18, picture 8.28, referred to here as needle jet.

http://www.exupbrotherhood1.com/brother ... Manual.pdf

But damn--still don't see it on the Yamaha parts list.

Kontoboy