Spark plug color

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05 Aug 2022 14:36 #871737 by gordone
Replied by gordone on topic Spark plug color
Have you installed air corrected jets?
by doing that you can use orginal jetting and needle height, only adjust for det 4 to 1 Exhaust.

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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05 Aug 2022 15:06 #871740 by Maxbou92
Replied by Maxbou92 on topic Spark plug color
I cannot find anywhere the air corrected jet (62). I have 4 pod, 4-1 stock exhaust with open slip on, small porting, 0.06 milled head, 0.5 oversize. So my set up for now is ; 125 to 130 main jet, pilot at 2 1/4 turns, Im waiting 40 pilot jet?! With 2 of 0.5mm shims needle. Planning to renove one shim, it makes some Burp at low rpm in each gear!! But at 3500-6000 it sounds and ride very good!! I dont push it more for my new engine !!!

Kz750e 1980

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07 Aug 2022 04:44 #871806 by zed1015
Replied by zed1015 on topic Spark plug color

Have you installed air corrected jets?
by doing that you can use orginal jetting and needle height, only adjust for det 4 to 1 Exhaust.
With pods and air corrector jets you still need to increase the main jet size regardless of exhaust fitted.
All other settings remain stock .

 

AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
kzrider.com/forum/23-for-sale/611992-air-corrector-jets-





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07 Aug 2022 04:50 #871807 by Maxbou92
Replied by Maxbou92 on topic Spark plug color
All right, so now I have 130 installed instead 125 and 1mm needles shim. What are you thinking about 

Kz750e 1980

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07 Aug 2022 07:37 #871812 by TexasKZ
Replied by TexasKZ on topic Spark plug color

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

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07 Aug 2022 07:49 #871813 by Maxbou92
Replied by Maxbou92 on topic Spark plug color
Thank you, but I dont think these jet works for the Keihin Cv34. I haven’t any jet that looks like these jet?! 

Kz750e 1980

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