Main Jets Wanted

**Tue Mar 04, 2008 2:17 pm » Post: #1 » Download Post**

Hi, i am looking for a range of MJ from 150 -180 for my MC21 as i have some dyno time booked but not enough jets to cover this range as the HRC kit goes from 180 upwards.
So if any one can help!!
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MC21 300
Aprilia RS250 track bike

**Wed Mar 05, 2008 11:20 pm » Post: #2 » Download Post**

Have you cut your airbox yet?

**Thu Mar 06, 2008 8:50 am » Post: #3 » Download Post**

I have a couple of different airbox lids, I am trying to see which one gives the best results for my particular motor so just need to cover my options with jetting.
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MC21 300
Aprilia RS250 track bike