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Mikuni Pilot Jets?

Started by ChrisK, May 07, 2013, 10:48:53 AM

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ChrisK

May 07, 2013, 10:48:53 AM
I'd like to try out a size 40 jet, instead of the stock 37.5's I have. But I can't seem to find the correct ones for sale anywhere, can someone point me in the right direction?

It seems the Ducati's use the pilots that don't have the holes in the sides of them, just the hole at the end. I can find 40's in the ones that have the holes in the sides but not in the solid version. My local Yamaha dealer has the holed versions, when I asked for pilots for a Yam TDM 850.
1998 M900
2007 CBR600RR Track Bike
1982 Virago 920 Cafe/Fighter Project
1980 Lambretta Moped
Supra Boats enthusiast

"There is no minimum."  - some guy.

ChrisK

#1
May 07, 2013, 11:22:19 AM
Actually I just found some here:

http://www.pjmotorsports.com/mikuni-jets.html

For two of them plus shipping it comes out to like $22 though, I don't know if I feel like paying for that.
1998 M900
2007 CBR600RR Track Bike
1982 Virago 920 Cafe/Fighter Project
1980 Lambretta Moped
Supra Boats enthusiast

"There is no minimum."  - some guy.

koko64

#2
May 07, 2013, 11:42:07 AM
Sudco didnt have them?
2015 Scrambler 800

ducpainter

#3
May 07, 2013, 12:05:24 PM
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


ChrisK

#4
May 07, 2013, 12:28:35 PM
They're $6.36 each and they say you have to buy 4 at a time.
1998 M900
2007 CBR600RR Track Bike
1982 Virago 920 Cafe/Fighter Project
1980 Lambretta Moped
Supra Boats enthusiast

"There is no minimum."  - some guy.

ducpainter

#5
May 07, 2013, 12:31:21 PM
I guess $22 shipped isn't that bad then.

Will they sell you 2 of 2 different sizes?
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Speeddog

#6
May 07, 2013, 12:52:59 PM
Factory Pro has 'em, they're Mikuni model 151.067.

http://factorypro.com/products/Jets,%20Mikuni,%20buy.htm#Pilot_jets

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(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

ChrisK

#7
May 07, 2013, 01:12:22 PM
Okay I'm finding a lot more sources now that I'm using that 151.067 number in my searches. Seems like everywhere has to sell them in quantities of 4. Cheapest I've seen is 19.95 but that's before shipping. Think I might try to get the Yam dealer to order some in for me so I can buy two for $8 total...
1998 M900
2007 CBR600RR Track Bike
1982 Virago 920 Cafe/Fighter Project
1980 Lambretta Moped
Supra Boats enthusiast

"There is no minimum."  - some guy.

ChrisK

#8
May 07, 2013, 01:20:57 PM
I don't know if this is the place to ask but it seems I have the attention of some of you tech guru's so I'm going to.

I'm still not quite satisfied with where I ended up after rejetting the carbs. It's running fine, and fuel economy is fine, but something just seems fishy.

I have to have the mixture screws 6 full turns out for it to start. I also have the needles on the 6th and final position. I think the float level ended up at 13 mm so not too far off recommended, but still...

This is why I'm trying to source the pilot jets, so I can try the 40's and have my mixture screws at a normal setting. Does that sound right?

I will say that I DO NOT have the "coughing issue" I previously had that I mentioned in my other thread and spurred the whole process of learning to rejet. Of course, it really hasn't been cold since I successfully rejetted.
1998 M900
2007 CBR600RR Track Bike
1982 Virago 920 Cafe/Fighter Project
1980 Lambretta Moped
Supra Boats enthusiast

"There is no minimum."  - some guy.

ducpainter

#9
May 07, 2013, 01:54:42 PM
I agree that something is fishy.

Your needle settings make no sense to me, but if it runs good...

I forget what your airbox configuration is like.

The 6 turns out makes no sense to me either, but larger jets should change that. Do you use the enrichment lever for cold starting?
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


ChrisK

#10
May 07, 2013, 02:19:35 PM
Air box is a chopped stock box with the K&N dropped in.

Yes, I use the lever. Lately I've only had to keep it on for around 30 seconds until the bike is warm enough to stay idleing on its own. Again, that is with a 60 degree morning. Also, twisting the throttle as I press the starter button is part of my ritual. By no means am I twisting to full throttle, but it seems I need to give it a little juice to get it started.
1998 M900
2007 CBR600RR Track Bike
1982 Virago 920 Cafe/Fighter Project
1980 Lambretta Moped
Supra Boats enthusiast

"There is no minimum."  - some guy.

ducpainter

#11
May 07, 2013, 02:27:27 PM
Quote from: ChrisK on May 07, 2013, 02:19:35 PM
Air box is a chopped stock box with the K&N dropped in.

Yes, I use the lever. Lately I've only had to keep it on for around 30 seconds until the bike is warm enough to stay idleing on its own. Again, that is with a 60 degree morning. Also, twisting the throttle as I press the starter button is part of my ritual. By no means am I twisting to full throttle, but it seems I need to give it a little juice to get it started.

How about exhaust?

I need to use the lever every time the engine is started for the first time of the day regardless of ambient temp. The time it needs to be engaged definitely varies with temp.

Manipulating the throttle does nothing on a carb with no accelerator pump other than lean the mixture, if anything at all. Especially a CV carb where the throttle does not lift the slide.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


ChrisK

#12
May 07, 2013, 02:33:16 PM
Well then I guess I just do it out of habit from all the other carburated vehicles I've had experience with in the past, or maybe I just like the sound : )

The exhaust is Staintune slip-ons. So, a summary of my entire setup:

Chopped Airbox with K&N filter
Staintune slip-ons
Stock carbs
Dynojet 170 mains
Dynojet Needles - 6th position
Brand new Factory Pro Needle Jets
Stock 37.5 Pilot Jets
13 mm float height
6 turns out on mixture screws
1998 M900
2007 CBR600RR Track Bike
1982 Virago 920 Cafe/Fighter Project
1980 Lambretta Moped
Supra Boats enthusiast

"There is no minimum."  - some guy.

ducpainter

#13
May 07, 2013, 05:01:30 PM
I'll be interested to see if your needle position needs changing when you change pilot jets.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


koko64

#14
May 07, 2013, 05:29:11 PM
You read my mind. ;)
2015 Scrambler 800
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