1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Boost prepped Nikki updates

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Old May 28, 2018 | 11:56 PM
  #1  
Jeff20B's Avatar
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Boost prepped Nikki updates

It's been a while and I've gotten some questions about some aspects of what to do and why, so here is a closeup of the business end of a boost prepped Nikki.
Sorry about the size/width. The forum has changed so much lately.

Specs are 24.7mm and 30.0mm
120 (Mikuni) idle air bleeds
46 stock long slow transition bleeds
70 stock primary main air bleeds
80 modded secondary main air bleeds
solder filled (upper cavity only) secondary long slow bleeds
37 solder filled and drilled old primary idle bleeds

118 drilled accel pump nozzle
boosters aerofoil shaped and expanded + blue loctited in place, and centered accurately
baseplate hogged/funneled to create an anti-reversion lip

124 primary jets
150 secondary jets
about 12 to 12.5 AFR at part throttle cruise
11.0 to 11.5 AFR at full throttle in boost (safe tune for boost and cooler temps)
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Old May 29, 2018 | 09:22 AM
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Waffles - hmmm good
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Looks really clean too! Nice update Jeff.
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Old May 30, 2018 | 07:29 PM
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Running an intercooler yet?

I like those booster. Look real sharp.
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Old May 30, 2018 | 07:33 PM
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Not yet. And thanks!
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