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Post by transitman on Feb 23, 2013 21:56:26 GMT -5
Hey guys any suggestions on a propper jet size for 72cc 47mm bbk.
running it with a high flow uni. I have a performance carb that came with a 75 main jet. I tried up jetting to 90 but it was rich for sure. seems to run fine with the 75 but i dont want to lean it out.
im thinking an 80 would be good. ty for any advice
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Post by millsc on Feb 23, 2013 21:59:46 GMT -5
Id think 82 - 88 check the plug, I would try an 85
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Post by inuyasha on Feb 23, 2013 22:05:16 GMT -5
Hi
I agree with millsc
Im running an 88 main with a 20 mm delorto carb on my 95 cc bbk redstreak scoot with good results
Just be sure to check your jet changes with plug chops and you will be just fine
Take care and ride safely
Yours Hank
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Post by stiv625 on Feb 23, 2013 23:24:22 GMT -5
For what it's worth I run a 90 or 91 can't remember on my 50mm 83cc kit with free flow intake but managed an 85 on my secret 63cc with intake and exhaust mods so every scoot is diff get a few jets and play around
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Post by peteyparado on Feb 24, 2013 5:20:33 GMT -5
is different for every scoot u should test an tune! when i was using a 72cc bbk i was running a 88main jet.
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Post by transitman on Feb 25, 2013 9:40:40 GMT -5
thanks a lot guys im getting a few jets today. Im gonna try 82 85 and 88. i appreciate the input.
should i also step up the idle jet? thanks again
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Post by stiv625 on Feb 25, 2013 10:19:14 GMT -5
Unless you're having problems starting and idling it doesn't matter. A slightly bigger one would probably help with the UNI intake though.
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