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added uni filter now what?
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Posted by: stoneman

2006 90 cc a/c, stock Mikuni carb.
I replaced stock filter with a uni pod filter. Quad runs terrible now.
Falls on its face, wont power up.who knows what the proper jetting needs to be now and who sells them?
Ran perfect BEFORE.

Posted by: bulldogfallon

A stk DRX 50 with that carb in FL will run a 105 MJ

Have you tried a 110 or 115 MJ?

You may also need to adjust the needle clip setting and the air screw as well

Posted by: dblacks

whats in it for a maine jet now?

Usually since you are giving it more air you will need to go up in main jet size to give it more fuel

Posted by: stoneman

I have raised the needle all the way and it helped slightly.
It has the stock jets.
I will pull it off and find a couple larger main jets. Do I need to go up on pilot jet also?
Will any bike shop have Mikunu jets?
thanks cb

Posted by: humboldt hills

Pilot will be fine.
we have to run a 125-130 main jet in ours here in OHIO!
Most good shops will have them. NOt all!

Posted by: stoneman

Pulled carb and it has a 100 main jet and a 25 pilot.
I will try to find a few larger jets and report back.

Posted by: MXfun

I am using a uni-filter with a 20 pilot and 100 main in a 16mm Mikuni on a 2007 DRR 50 in Ohio. Thanks to Marc at Hot Quads for assisting.

Posted by: bulldogfallon

That is a lean main jet

In fl we run a 105 and your area usually requires a fatter main jet

Posted by: MXfun

I also raised the needle to the highest notch. It really does run good. It came stock with a 25 pilot and 105 main, 4th notch needle setting. Much smoother powerband than it used to have.

I have thought about trying the 105 jet again, but it seems to run good as is. I may tinker when I get bored.

Posted by: hotquads1

on the 90cc a 110, should work well , as
bulldog as mentioned. depends on what fuel, and air temp, also.
pilot is big enough, maybe too big, try a 22.5
marc