Jetting for 150cc 5 port upgrade with Sip exhaust

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Jetting for 150cc 5 port upgrade with Sip exhaust

Postby brianwar » Tue Feb 28, 2017 9:36 pm

Hi,
Anyone got any info on what jetting to use on a 150 cc 5 port upgrade using a Sip road 2 exhaust I'm fitting to my 125 2t. Willing to do plug chops but looking for a start point and info on what jets to order.
brianwar
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Re: Jetting for 150cc 5 port upgrade with Sip exhaust

Postby Leigh » Wed Mar 01, 2017 1:15 pm

Hi Brian,

We used to do loads of these and always started with a 110 main jet. That's generally a bit rich, but better to be on the safe side. That said, a lot did run well with a 110. As long as you aren't getting any bogging down, I would always sooner be slightly rich.

Cheers,

Leigh.
Another fine tip stole from Mick Maidment!!!!
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Re: Jetting for 150cc 5 port upgrade with Sip exhaust

Postby brianwar » Thu Mar 02, 2017 6:38 am

Hi Leigh thanks for the info much appreciated.
Brian
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