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Mikuni RS34 Jetting 19 May 2023 11:21 #884923

  • daveo
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I've been happy with my carb settings for 50's and 60's F. Spring riding, and anticipate the need to lean them for Summer temps in the 70's and 80's.

Should I be able to compensate by changing air jets or simply lowering the main jet needles?




1982 KZ1100-A2

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Mikuni RS34 Jetting 22 May 2023 09:05 #885069

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Referencing the zed1015 air corrector jet forum post from 25 Dec. 2019 link below: 

kzrider.com/forum/23-for-sale/611992-air...kunis?start=0#815860


Mikuni BS30/97 Air Jets come with orifice sizes ranging from 0.5 to 2.0 per Niche chart (link below) which appear to correlate with measurements observed on my digital micrometer.

www.nichecycle.com/ncs/categories/carbur...r-jet-by-mikuni.html


RS Flat Slide MIkuni carbs utilize BS30/97 air jets.  
With current cool air temps and low humidity where I live, my engine purrs at idle, and spark plug color appears good.  Acceleration and deceleration are strong/smooth with the following (air corrector?) jets installed:

#1  size 1.0
#2    "    1.2
#3    "    1.2
#4    "    1.1

The Pilot Fuel Screws are set between 1/8 and 1/4 turns out from lightly seated.




 
1982 KZ1100-A2

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