pop off super high

[x2ryder]

I just jetted a set of 48 BJ's per Art's specs. He says run a 2.0 needle and seat along with a 95 (silver) spring. It should have 25psi but I am getting more like at least 30psi. Whats the deal. This is on both carbs.

 

[surferdude345]

The arms could be bent - call Art and ask him what he thinks he loves to talk

 

[SUPERTUNE]

Make sure you know that you have 95 gram springs, and not the new 115 springs are now bright silver (chrome like) as the old ones were gold.

 

[x2ryder]

Ok, well the package says 95 gram.

 

[Mark44]

check with a known 95 gram spring and check accuracy of pop off tester.

 

[x2ryder]

I am starting to think my guage is messed up. It doesnt seem to matter what spring I put in there. It reads to the max.

 

[D-Roc]

are you using a little wd-40 to wet test?

 

[x2ryder]

No, should I be?

 

[surferdude345]

yes

 

[x2ryder]

sprayed wd 40 in the needle and seat. No difference

 

[waxhead]

Make sure you know that you have 95 gram springs, and not the new 115 springs are now bright silver (chrome like) as the old ones were gold.

I have no idea why they did that
its just makes life hard when your looking for the spring

 

[x2ryder]

These look more dull than shiney. I got them from Atlantic Jet sports.

 

[Flash-FX]

I recently ran across a similar problem with those springs, needles & seats. The parts are probably not genuine "Mikuni" replacements. The real goofy thing that brought this whole thing to my attention was the weight of the actual "needle". I brought out the RCBS scale that you weigh gunpowder with and checked them both. Here's what I found...

1- OEM Mikuni needle = 10.925 grains

2- Aftermarket ? needle = .88 grains (over 12 times lighter)


I think (without destroying it) the aftermarket needle is chrome plated plastic. The actual tip is probably Viton which is good and being lighter would most likely be able to seat better with engine vibration. The parts went back in the package.

As for the springs...you might have to find another or cut off a bit of the "coil" to make it shorter.

 

[x2ryder]

I just ordered genuine Mikuni needle and seats along with mikuni 95 grams springs. We will give this a try.

 

[Philip Clemmons]

Keep us updated..................

 

[2XLR8]

I would run what you are old to run and don't worry about the pressure. Chances are your gauge reads 4 to 5 pounds too high.

 

[x2ryder]

I replaced the needle and seat and spring with genuine Mikuni. Still the same I am gonna say it's my guage.

 

[WFO Speedracer]

i replaced the needle and seat and spring with genuine mikuni. Still the same i am gonna say it's my guage.

yo dawg yo gage b wacked!