150 5 Port/Sip road 2 jetting

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150 5 Port/Sip road 2 jetting

Postby Jez123 » Sat Nov 26, 2016 8:47 am

Hi, I'm going to fit a 150 5 port kit to my last run 125.
It's already derestricted with a Sip road 2 and drilled air filter etc.
What main jet is recommended?
Cheers.
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Re: 150 5 Port/Sip road 2 jetting

Postby rob h » Sun Nov 27, 2016 7:31 pm

My 150 3 port ran 104 main, 160/be3, with sip road. mates 5 port 108 with simmonini. No absolute jetting number,
obviously run rich whilst running in. Maybe start 109 and come down?
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Re: 150 5 Port/Sip road 2 jetting

Postby Jez123 » Mon Nov 28, 2016 6:25 pm

I've got a jet kit 102 -120 going up in 2's so I'll try a 110 to start.
Cheers.
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Re: 150 5 Port/Sip road 2 jetting

Postby Cli83 » Wed Aug 02, 2017 5:08 am

I've got a 150 2t that was re reg as a 125 and had a 125 kit put on it I've put it back to a 150 5 port original lml kit and ran it in at 1000miles it had a a sterling pipe on it and a 24/24 carb and a main jet of 128 and seem to run fine whilst running in ive done about 1200 miles now I've just changed the sterling pipe for a sip Rd 2 as the sterling was very close to rear wheel and a swine to change when at road side if I got a flat ive down jetted it to a 118 as I was told by some one that 128 main that was in was way to big now it's a pig to start and warm up but seems to run fine in fact it's much quicker but when I take it on a run and open it to nearly full throttle when you shut the throttle off and back on again it bogs as if it's gonna die then it will clear it's throat and pick back up again any ideas thanks guys.
Cli
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Re: 150 5 Port/Sip road 2 jetting

Postby rob h » Fri Aug 04, 2017 8:23 pm

Even with a 24mm carb, normally around 106 to 110, with a sip road 2. If your bogging and your plug is black normally too rich.
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