BS34 Jet/Needle Info?

  • TeK9iNe
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BS34 Jet/Needle Info?

10 Jun 2009 11:17 - 10 Jun 2009 12:18
#298023
Hey all,

I've got Mikuni BS34 CV Carbs, and I want to richen the entire throttle range.

I've heard alot about changing jets, but what about the needle/taper for the mid range?

Or will just changing jets take care of this?

Thanks,

Cheers.

B)

PS, Ive got stock airbox/emgo filter + 4-1 exhaust. Any jet/needle suggestions?
Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)
Last edit: 10 Jun 2009 12:18 by TeK9iNe.

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Re: BS34 Jet/Needle Info?

10 Jun 2009 19:53
#298186
Anybody?

Cant seem to find what I'm lookin' for with the search...

?
Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)

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  • Buda
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Re: BS34 Jet/Needle Info?

11 Jun 2009 18:14
#298488
Wg Rejeted my bs34s. I will look for the jet info for you but im running pods and a V&H megaphone so I dont think what Im running would be right for you.
Tom
1982 KZ 1170 LTD
10.25 to 1 comp
K&N pods
GPZ cams
Vance&Hines pipe with comp baffle
dyna coils and wires
97 Valkyrie Standard

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Re: BS34 Jet/Needle Info?

11 Jun 2009 18:21
#298489
Wg = Wired George ?
You have GOT to be kidding me?
What a theiving screw up that guy is.
And anyone reading this can tell him what you read, and who wrote it.

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  • otakar
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Re: BS34 Jet/Needle Info?

11 Jun 2009 18:42
#298493
The jets will only take care of the last 20% of the throttle range. I have custom needles made for these. The set is $45 plus $4.50 post this includes spacers to richen them even more if you want. You can email me at otto@condormodels.com
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000

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Re: BS34 Jet/Needle Info?

11 Jun 2009 19:05 - 11 Jun 2009 19:06
#298502
have you ever had any problems with your carbs? My #1 keeps cutting out. (bs34)
80 IT175, 84 XL200, XT250, 95 ST1100 96 xr650l (30k miles),kz1000, KX250 97'
Last and most important 93 KX500.
Last edit: 11 Jun 2009 19:06 by Calhoun.

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Re: BS34 Jet/Needle Info?

11 Jun 2009 19:50
#298513
I specialize in these carbs, and modifying them for pod filters. There could be all kind of problems with them. I just take them totally apart and boil the bodies. Than I replace the parts that require replacing wen I put them back together. I also perform certain modifications which the EPA would not agree with but the bike dose. :woohoo:
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000

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  • TeK9iNe
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Re: BS34 Jet/Needle Info?

12 Jun 2009 02:04
#298543
Calhoun wrote:
have you ever had any problems with your carbs? My #1 keeps cutting out. (bs34)

I hav'nt had any problems in particular. For the most part they've ran fine with all plugs looking the same, good valve clearances of course.

Just with my current exhaust setup, they're pretty lean through the mid range...

Cleaned Pilots really good, and drilled my mains out to 130 which helped the last 20% got new pilots on the way...

We shall see...

B)
Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)

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