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General => General Discussion => Topic started by: houg on May 14, 2017, 02:23:51 AM

Title: 70cc jetting question
Post by: houg on May 14, 2017, 02:23:51 AM

I have a 2002 kymco cobra racer that I just installed a 70 cc big bore kit. It has a tecnigas pipe and the stock air box with a 85 main jet. What size main jet would be a good starting point??  I was thinking with going with a 92 main jet. Any suggestions

Title: Re: 70cc jetting question
Post by: Redk on May 14, 2017, 03:27:38 PM

Purchase a little Number drill set that covers that range, and a pin vise to drill your jet open, larger, step by step.
redk

Title: Re: 70cc jetting question
Post by: houg on May 14, 2017, 04:23:12 PM

yea i was thinking of doing that but its easier and cheaper just to buy a jet kit,  i just want to know what a good starting point as far as jet size
https://www.amazon.com/gp/product/B06XHZKC8M/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 (https://www.amazon.com/gp/product/B06XHZKC8M/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1)

Title: Re: 70cc jetting question
Post by: Redk on May 15, 2017, 05:18:44 PM

That IS a nice price for a handful of jets !
redk