Author Topic: What causes worn needle jets?  (Read 2746 times)

Offline interfuse

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What causes worn needle jets?
« on: September 09, 2007, 11:31:48 AM »
I was cleaning my carbs yesterday and I noticed the needle jets on cylinders #3 and #4 are worn. #1 and #2 are okay.

What causes this? Unbalanced carbs? Play in the slides?

I replaced the needle jets less then 10,000 km ago. I'm using a factorypro jet kit. The needles are still in good shape.
Mike

'91 GSF400
It's more fun to ride a slow bike fast than a fast bike slow.

Offline gsxr400 racer

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Re: What causes worn needle jets?
« Reply #1 on: September 09, 2007, 02:17:17 PM »
Quote from: "interfuse"
I was cleaning my carbs yesterday and I noticed the needle jets on cylinders #3 and #4 are worn. #1 and #2 are okay.

What causes this? Unbalanced carbs? Play in the slides?

I replaced the needle jets less then 10,000 km ago. I'm using a factorypro jet kit. The needles are still in good shape.

do you have ti needles? sloppy slide hole where needle fits
1988 gsxr 400 sp (sprint bike)
*  SELLER OF THE 442CC BIG BORE PISTON KIT FOR THE BANDIT 400,GSXR400, GK73 and 76.* And carb kits(orings)too. Email me from here.
has been a wera expert #610 lol

Offline interfuse

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What causes worn needle jets?
« Reply #2 on: September 09, 2007, 06:10:40 PM »
I'm using the standard needles -- not the TI ones. I'll have to take a look at the slides.
Mike

'91 GSF400
It's more fun to ride a slow bike fast than a fast bike slow.

Offline PitterB4

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Re: What causes worn needle jets?
« Reply #3 on: September 11, 2007, 08:01:12 AM »
Quote from: "gsxr400 racer"
sloppy slide hole


Getting a bit personal, aren't we?   :bandit:
Rob
Bikeless!
'93 Bandit 400 - SOLD
'98 Honda F3 Track Bike - SOLD
'98 Kawi ZX-6R Street Bike - SOLD
NESBA #87 - RETIRED
'00 Gary Fisher Kaitai
'09 Bianchi Via Nirone 7

Offline interfuse

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What causes worn needle jets?
« Reply #4 on: September 11, 2007, 02:04:12 PM »
Rob, thanks for brightening my day. You need to buy another B4, I miss your posts!
Mike

'91 GSF400
It's more fun to ride a slow bike fast than a fast bike slow.

Offline PitterB4

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What causes worn needle jets?
« Reply #5 on: September 12, 2007, 02:45:29 PM »
Hey, I still post!  My work schedule is crazy.  I'm traveling a ton.  Then when I'm in the office and have a few minutes, our corporate web filtering software sometimes blocks BA.... sometimes not.  But, I'm still around.   :motorsmile:
Rob
Bikeless!
'93 Bandit 400 - SOLD
'98 Honda F3 Track Bike - SOLD
'98 Kawi ZX-6R Street Bike - SOLD
NESBA #87 - RETIRED
'00 Gary Fisher Kaitai
'09 Bianchi Via Nirone 7

Offline gsxr400 racer

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What causes worn needle jets?
« Reply #6 on: September 13, 2007, 11:08:47 AM »
Quote from: "PitterB4"
Hey, I still post!  My work schedule is crazy.  I'm traveling a ton.  Then when I'm in the office and have a few minutes, our corporate web filtering software sometimes blocks BA.... sometimes not.  But, I'm still around.   :motorsmile:


Hope it still allows you time for your family life most detrimental to children :stickpoke:
1988 gsxr 400 sp (sprint bike)
*  SELLER OF THE 442CC BIG BORE PISTON KIT FOR THE BANDIT 400,GSXR400, GK73 and 76.* And carb kits(orings)too. Email me from here.
has been a wera expert #610 lol

Offline PitterB4

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What causes worn needle jets?
« Reply #7 on: September 15, 2007, 12:36:55 AM »
What sucks is that the kids haven't been able to go to the track with me at all this year.  Something always comes up.  All the travel for work makes weekends away by myself at the track tough to justify.  If I'm still on the road so much in the spring, I think the track bike is going bye, bye....
Rob
Bikeless!
'93 Bandit 400 - SOLD
'98 Honda F3 Track Bike - SOLD
'98 Kawi ZX-6R Street Bike - SOLD
NESBA #87 - RETIRED
'00 Gary Fisher Kaitai
'09 Bianchi Via Nirone 7

Offline gsxr400 racer

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What causes worn needle jets?
« Reply #8 on: September 15, 2007, 07:41:25 AM »
Quote from: "PitterB4"
What sucks is that the kids haven't been able to go to the track with me at all this year.  Something always comes up.  All the travel for work makes weekends away by myself at the track tough to justify.  If I'm still on the road so much in the spring, I think the track bike is going bye, bye....

Maybe some dirtbike...s are in the future :stickpoke:
1988 gsxr 400 sp (sprint bike)
*  SELLER OF THE 442CC BIG BORE PISTON KIT FOR THE BANDIT 400,GSXR400, GK73 and 76.* And carb kits(orings)too. Email me from here.
has been a wera expert #610 lol

Offline PitterB4

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What causes worn needle jets?
« Reply #9 on: September 16, 2007, 12:28:16 AM »
Yeah - you're not the first person to suggest that.  I'm thinking a boat of some sort is more likely.  BTW, I've had some shit come up and the October Beaver weekend is in doubt.  I've gotten rained out my last 3 track days.  What a crappy year.
Rob
Bikeless!
'93 Bandit 400 - SOLD
'98 Honda F3 Track Bike - SOLD
'98 Kawi ZX-6R Street Bike - SOLD
NESBA #87 - RETIRED
'00 Gary Fisher Kaitai
'09 Bianchi Via Nirone 7

Offline gsxr400 racer

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What causes worn needle jets?
« Reply #10 on: September 16, 2007, 10:39:42 AM »
Quote from: "PitterB4"
Yeah - you're not the first person to suggest that.  I'm thinking a boat of some sort is more likely.  BTW, I've had some shit come up and the October Beaver weekend is in doubt.  I've gotten rained out my last 3 track days.  What a crappy year.


yea well ive yet to finish rebuilding my tranny in my big ass chevy peice o shit and i just started to clean the head for my race bike but still have to make sure i got cam caps that work or message them so they do then put it all to gether so you know i may or may not and it cold as hell already and i only have slicks but keep in touch.
1988 gsxr 400 sp (sprint bike)
*  SELLER OF THE 442CC BIG BORE PISTON KIT FOR THE BANDIT 400,GSXR400, GK73 and 76.* And carb kits(orings)too. Email me from here.
has been a wera expert #610 lol