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Author Topic: Mikuni PLASTIC Main Jet  (Read 1564 times)

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Offline Davey Crocket

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Mikuni PLASTIC Main Jet
« on: September 09, 2014, 04:35:05 pm »
Has anyone come across a plastic Mikuni main jet before. I am rebuilding a RM250A motor and was checking the carby jets before starting and came across this. Its a round slide 36mm carb, looks original [doesn't have the idle screw]. It even has the size on it [270]. Just curious.
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Offline VMX60

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Re: Mikuni PLASTIC Main Jet
« Reply #1 on: September 09, 2014, 05:14:07 pm »
That is way back, Sold as a aftermarket item Plastic main jets to suit Mikuni , then if you overtighten they change size . maybe late 70s ??? think a K+N  BRAND  :)

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Offline LWC82PE

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Re: Mikuni PLASTIC Main Jet
« Reply #2 on: September 09, 2014, 05:26:46 pm »
They were made by PSI and were called 'Pro-Jet kits' I got a few NOS ones. They also made clear float bowls.
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Offline Davey Crocket

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Re: Mikuni PLASTIC Main Jet
« Reply #3 on: September 09, 2014, 05:34:34 pm »
Yea, this one has been stretched......big time, undid it with my fingers.
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oldfart

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Re: Mikuni PLASTIC Main Jet
« Reply #4 on: September 09, 2014, 05:36:45 pm »
Joan  most probably what LWC has quote is correct as you could buy them back in the day ... a bit of "Craft" syndrome creeping in mate  ;)
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