Stage 2 Predator 212 Will not start nor run right. Please help me!!

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adelminibikeman

Member
#41
#41
SAS289 said:
I'm wondering why and how it stopped leaking after about 27 seconds into the video.

He shouldn't have to be in there tweaking the float on a new carb. GPS had it open to put a 130 jet in there and should have verified the float adjustment while it was open. In their video they suggest half to 3/4 out on the idle mixture screw. Why wouldn't it come already set that way? And if they were good they would put the idle (slide) screw in a known good starting position.

The GPS kit is $98. For the extra $60 over an Amazon kit they should have it completely setup at a base line for their customers. Otherwise, you are paying $60 for a 130 jet and "GPS" etched onto the carb. These VM22 clone carb kits are $30 on Amazon. I'm sure it's possible to get a bad one. But the two I got worked once set up and tuned.
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Hmm.. So I have one more of the exact same carb laying around that I was sent on accident for some shipping problems for GPS. I can either try installing that one or people have told me that nibbi carburetors from amazon work really well too. I could give it a try. I really think the carburetor is the problem in my build because i’ve verified everything else like timing, compression, spark, fuel etc. Hoping it’s just a faulty carburetor and nothing more.
 
SAS289

SAS289

Well-Known Member
#42
#42
Yeah the other carb may be a good next step.

You could go Nibbi or PWK or something else but how much better would they perform than a tuned VM22 clone? Anyone know?

If cost isn't an issue you have a lot of options.
 
A

adelminibikeman

Member
#43
#43
SAS289 said:
Yeah the other carb may be a good next step.

You could go Nibbi or PWK or something else but how much better would they perform than a tuned VM22 clone? Anyone know?

If cost isn't an issue you have a lot of options.
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Really just want to get it running at this point. I’ll look into both options and if you guys think getting a Nibbi or PWK is a good route, i’ll get them. Let me know please.
 
A

adelminibikeman

Member
#49
#49
SAS289 said:
That should work.

We don't know enough about your engine to comment. Like what cam did you use? What gearing? How much RPM do you intent to run?

From what I have seen from the VM22 clone with its 26mm venturi I would get the 24mm version of the Nibbi.
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I used a stage 2 kit from GPS. here’s a link. Gearing as of now is a 60-12 i believe with a 30 series torque converter. So a 24mm then? Also, could I use the same manifold as the one i currently have or should I get a new one, i’m having trouble finding one.
 
A

adelminibikeman

Member
#50
#50
adelminibikeman said:
I used a stage 2 kit from GPS. here’s a link. Gearing as of now is a 60-12 i believe with a 30 series torque converter. So a 24mm then? Also, could I use the same manifold as the one i currently have or should I get a new one, i’m having trouble finding one.
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SAS289, if you could please send me what i need along with the Nibbi, such as the manifold and air filter it would be greatly appreciated.
 
sparkwizard

sparkwizard

#53
#53
Don't take it apart, just bolt it on.
If it runs, tune it. If it doesn't run, just stop.
OK? The reason is : The more places and people you ask, the more answers you get.
Generally only one of those will be correct.;)
 
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