Author Topic: needles jets and carbs oh my! (Read 9060 times)

wyntrblue · « **on:** September 27, 2005, 07:46:48 PM »

hiya peoples...

my b4 is a little poorly :( and i have been told by my garage that it prob needs new needles and jets in the carbs... ok fair enough so the all important questions is.....

1 where in the uk can i get those parts?
2 are there any parts im gonna need to get for when i change them?

thanks

PitterB4 · « **Reply #1 on:** September 27, 2005, 09:24:35 PM »

You might be on a scavenger hunt, my friend. Word is Suz/Mikuni stopped making the jets. That was reported on one of these threads, anyway.

Red01 · « **Reply #2 on:** September 27, 2005, 10:54:31 PM »

IIRC, the Factory-Pro jet kits are still available for the B4, so your solution just might be to rejet it for more power to cure it.

That is if the Factory-Pro kit is compatible with your bike.
Which market model is your B4?

interfuse · « **Reply #3 on:** September 28, 2005, 12:10:39 AM »

What are the symptoms? Depending on what's wrong a jet kit might help.
Dynojet and Factorypro both still sell bandit 400 kits. However, the kits only come with main jets, jet needles, and springs. If you need a replacement needle jet you're on your own. Suzuki has them listed as discontinued.

Here's the factory pro website
www.factorypro.com

Link showing needle damage
http://factorypro.com/tech/needle1.html

Link showing the dreaded needle jet damage
http://factorypro.com/products/needle_jet_Mikuni.html

While you're at it -- no carb rebuild is complete without changing all of the o-rings. Depending on what's wrong with your bike this might be the only thing required... last I checked you can order all the o-rings from Suzuki (although you'll pay an arm and a leg, you are guarenteed that the o-rings will fit and hold up to petrol).

interfuse · « **Reply #4 on:** September 28, 2005, 12:21:30 AM »

Quote from: "Red01"

That is if the Factory-Pro kit is compatible with your bike.
Which market model is your B4?

I used the Factorypro kit with a Canadian model bike (33mm carbs). It took some tuning, but the Factorypro settings for the US model bike were pretty close. I found it a bit too rich in the bottom end, which I corrected by modding my airbox and then increasing the MJ size...

Last weekend I pulled my plugs, compaired them to the plug chart and to my amazement I had the perfect plug. I wish my camera had batteries!

Maniac · « **Reply #5 on:** September 28, 2005, 12:32:12 AM »

Quote from: "interfuse"

Last weekend I pulled my plugs, compaired them to the plug chart and to my amazement I had the perfect plug.

What?!

I don't believe it! The Perfect Plug is just a myth, a legend told by old mechanics to keep the younger ones in line! It's like Santa Claus or the Easter Bunny, it doesn't actually exist!

Red01 · « **Reply #6 on:** September 28, 2005, 12:44:09 AM »

It's no myth, I've got one in my toolbox that came out of a Pratt & Whitney R-2800 18 cylinder radial - too bad the plug's life had been cut short by a sucked valve.

lots of FI engines have 'em.

gsxr400 racer · « **Reply #7 on:** September 28, 2005, 02:12:46 AM »

I hve them to 4 of them I just change mine for shits and giggles but i have race carbs

gsxr400 racer · « **Reply #8 on:** September 28, 2005, 02:34:28 AM »

Quote from: "PitterB4"

You might be on a scavenger hunt, my friend. Word is Suz/Mikuni stopped making the jets. That was reported on one of these threads, anyway.

Didnt i just get those for ya not to long ago ROB?

wyntrblue · « **Reply #9 on:** September 28, 2005, 06:54:53 AM »

Quote from: "Red01"

.
Which market model is your B4?

its a gsf400vp

symptoms include....

running rough at idle
idle having to be set really high
the bike just sounds like its running rough...

errrm

think thats all of them....lol

PitterB4 · « **Reply #10 on:** September 28, 2005, 08:43:32 AM »

Quote from: "gsxr400 racer"

Quote from: "PitterB4"
You might be on a scavenger hunt, my friend. Word is Suz/Mikuni stopped making the jets. That was reported on one of these threads, anyway.

Didnt i just get those for ya not to long ago ROB?

Yup! Then someone posted that they were all gone. I figgered I got the last ones! Someone has to get the last ones, right???

gsxr400 racer · « **Reply #11 on:** September 28, 2005, 09:48:35 AM »

well lucky you , but i can check my sorce!

Herr Tod · « **Reply #12 on:** September 28, 2005, 11:59:46 AM »

Have you checked that it is running on all 4 cylinders?

jcmjrt · « **Reply #13 on:** September 28, 2005, 12:05:11 PM »

Jay,
I'm interested in new jets too. Please check your source for me too. Thanks.

wyntrblue · « **Reply #14 on:** September 28, 2005, 12:14:13 PM »

yup its running on all 4.