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Mikuni BS34 Slide Changes

  • ajsfirehawk
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05 Sep 2018 09:05 #790363 by ajsfirehawk
Mikuni BS34 Slide Changes was created by ajsfirehawk
What is the reason for the changes in the slides on Mikuni BS34 carbs? Specifically the flat bottom slides versus the slides with the arch or cathedral bottoms on them? I know the arched bottoms appear on the GPz series which makes me think they are more performance oriented than the flat bottom slides. Anyone know why the two types were made and how they perform differently?

79 KZ650 SR
80 KZ1000 Z1 Classic
83 KZ1100 LTD
Z900RS
23 Mach 1

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  • ajsfirehawk
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09 Sep 2018 18:53 #790625 by ajsfirehawk
Replied by ajsfirehawk on topic Mikuni BS34 Slide Changes
Zero? No knowledge or just apathy?

79 KZ650 SR
80 KZ1000 Z1 Classic
83 KZ1100 LTD
Z900RS
23 Mach 1

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  • Nessism
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10 Sep 2018 05:11 #790633 by Nessism
Replied by Nessism on topic Mikuni BS34 Slide Changes
Are both sets from Kawasaki's? The set on the right looks same as used on Suzuki GS bikes. Regarding the slides, no clue. I don't think it matters tons but I suspect the KZ carbs may have some slight enhancements seeing as how they came out a year or so later than the GS version carbs.

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10 Sep 2018 05:34 #790636 by TexasKZ
Replied by TexasKZ on topic Mikuni BS34 Slide Changes
Also true of the aftermarket VM29 carbs. Ones for Suzuki used a 2.0mm cutaway, for Kawasaki and Honda, a 1.5mm cutaway was used.

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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10 Sep 2018 09:45 #790663 by ajsfirehawk
Replied by ajsfirehawk on topic Mikuni BS34 Slide Changes
Thanks for the input guys. Both came off of Kawasakis. The arched sliders are the style that come on the GPz's which suggests to me they are more performance oriented. This particular set with the arched sliders is NOT off a GPz. Those come with stamped steel caps on the top with #1 and #4 in a black wrinkle coat paint and painted carb bodies. This set has the cast aluminum caps. Otherwise they are identical to the GPz carbs. IIRC one of these sets came with the 83 KZ1100 and the other came with KZ1000 CSR. Both of them came to me used, so no guarantee that I received them with the original carbs although both bikes were otherwise box stock when I received them.

79 KZ650 SR
80 KZ1000 Z1 Classic
83 KZ1100 LTD
Z900RS
23 Mach 1

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03 May 2021 14:40 #847940 by ErlingW
Replied by ErlingW on topic Mikuni BS34 Slide Changes
I didn't know the 2.0 and 1.5 numbers referred to the size in millimeters? I thought it was lika the size on a T-shirt, Large, Medium and Small? Please enlighten me, if I'm wrong! Someone?

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03 May 2021 16:03 #847947 by TexasKZ
Replied by TexasKZ on topic Mikuni BS34 Slide Changes
Yes, millimeters. That refers to the height of the cutaway (arch) on the slides.

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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