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Scooters - 50cc => Like 50 2T => Topic started by: demeter on March 20, 2015, 02:05:47 PM

Title: Keihin PB16 Main Jet
Post by: demeter on March 20, 2015, 02:05:47 PM

So I just finished installing a bigger jet for my first time! Boy do I feel good.  ;D I'm a real man now right?  :P

Anyway I removed the airbox restriction while I was in there.

All the threads I viewed said the restricted jet was a 78 and to upgrade to 82 or larger. So I installed a 90. I bought a bag of sizes to play with it.

To my surprise the jet I removed wasn't a 78 but a 70..  :o Now I'm having second thoughts about installing a 90. I just put it all back together and haven't tried starting it yet.

Title: Re: Keihin PB16 Main Jet
Post by: demeter on March 20, 2015, 05:23:19 PM

Airbox restriction reinstalled.  :P

Title: Re: Keihin PB16 Main Jet
Post by: 245luigi on March 20, 2015, 05:39:56 PM

Wow thats a small jet! 90 MJ should have you running a bit rich. Check out the plug chop stuff to dial it in.

I found that the airbox restriction out while on the stock carb caused nothing but headaches