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Author Topic: When to upjet to a larger pilot jet  (Read 9465 times)

zombie

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Re: When to upjet to a larger pilot jet
« Reply #15 on: May 29, 2012, 01:28:44 AM »
I'm still apprehensive about the Scorpion pipe. I can hear the jetting in Expansion pipes but I never messed with an Infinite Baffle before. Hopefully it will work the same... (sound wise)
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wordslinger

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Re: When to upjet to a larger pilot jet
« Reply #16 on: May 29, 2012, 01:29:56 AM »
...yup...only piping i ever did onna 4t was with a cutting wheel, drill and welder...
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zombie

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Re: When to upjet to a larger pilot jet
« Reply #17 on: May 29, 2012, 01:34:36 AM »
4t's are much more forgiving on jetting. The pipe blocks the exhaust vs pulling it out. That is why even different pipes on the same 2t engine require different jetting.
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wordslinger

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Re: When to upjet to a larger pilot jet
« Reply #18 on: May 29, 2012, 01:37:41 AM »
..learned that..


..firing on every other stroke does have it's advantages..

       
          ;)
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Kenho21

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Re: When to upjet to a larger pilot jet
« Reply #19 on: May 31, 2012, 01:08:36 AM »
Now, where in the hell can I find a larger pilot jet? I'm having a hard time finding one, are there only two sizes, 35 and 45?

I didn't think this would have me so baffled...
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zombie

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Re: When to upjet to a larger pilot jet
« Reply #20 on: May 31, 2012, 01:15:07 AM »
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Kenho21

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Re: When to upjet to a larger pilot jet
« Reply #21 on: May 31, 2012, 01:18:33 AM »
That's just the stock size isn't it?
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2009 Kymco Agility 50- 72cc Airsal kit, Uni Free-Flow Air Filter, Main Jet 120, 1500 Contra Spring, 6g Rollers, Malossi Multivar Variator, NCY Exhaust, NCY 80cc Camshaft, Cut CDI, Smooth Boss Drive, MRP Ignition Coil

Kenho21

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Re: When to upjet to a larger pilot jet
« Reply #22 on: May 31, 2012, 01:19:53 AM »
Also, what size should I be investigating with a 72cc BBK, performance exhaust, open air filter setup?
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2009 Kymco Agility 50- 72cc Airsal kit, Uni Free-Flow Air Filter, Main Jet 120, 1500 Contra Spring, 6g Rollers, Malossi Multivar Variator, NCY Exhaust, NCY 80cc Camshaft, Cut CDI, Smooth Boss Drive, MRP Ignition Coil

zombie

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Re: When to upjet to a larger pilot jet
« Reply #23 on: May 31, 2012, 01:36:30 AM »
That store has other sizes avail. You should wind up at 45ish. Right now I have a 52 pilot in a 72cc kit. They all react differently. I would suggest getting a bigger/better carb anyway. The OEM is just too small for 70+cc's. 19mm Delorto or equivalent will shine. Tunning is a huge money pit.
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Kenho21

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Re: When to upjet to a larger pilot jet
« Reply #24 on: May 31, 2012, 01:54:39 AM »
Yea the money pit thing I understood about $1,500 ago haha.

Cool, I will start off with the 45 then.
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2009 Kymco Agility 50- 72cc Airsal kit, Uni Free-Flow Air Filter, Main Jet 120, 1500 Contra Spring, 6g Rollers, Malossi Multivar Variator, NCY Exhaust, NCY 80cc Camshaft, Cut CDI, Smooth Boss Drive, MRP Ignition Coil

zombie

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Re: When to upjet to a larger pilot jet
« Reply #25 on: May 31, 2012, 02:02:40 AM »
You will have it right when your idle mix screw is approx 2.5 turns out. That works for most all carbs.
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mono

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Re: When to upjet to a larger pilot jet
« Reply #26 on: June 04, 2012, 11:06:13 AM »
Quote
Yea the money pit thing I understood about $1,500 ago haha.

Yep,  same over here :-) ...
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zombie

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Re: When to upjet to a larger pilot jet
« Reply #27 on: June 05, 2012, 03:55:15 AM »
The sucky part is you can Never get that money back out of it. You Have to love modding or it's a big jerk waste.
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mono

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Re: When to upjet to a larger pilot jet
« Reply #28 on: June 05, 2012, 07:05:19 AM »
Quote
The sucky part is you can Never get that money back out of it. You Have to love modding or it's a big jerk waste.

I guess it works the same as alcohol and drugs in that way  ;D
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zombie

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Re: When to upjet to a larger pilot jet
« Reply #29 on: June 06, 2012, 05:50:53 AM »
EGGZACTLEE!!!

Since that pilot jet size posting I have gone down to a 48, and will go one more step. I should be at 47.
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