99 Scrambler 400 Won't Idle

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Jun 26, 2009 | 11:50 AM

#11

radjxf

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Weekend Warrior

Joined: Jun 2009

Posts: 19

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From: MT

Can anyone point me to a jetting chart for this machine?

Also, anyone have a manual that details how to properly set everything on this carb, i.e. air/fuel, etc?

Thanks again.

Jun 26, 2009 | 02:05 PM

#12

duster

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Joined: Mar 2000

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From: North Carolina

Yeah... I said if you needed it I would find it....

Let me start looking... I have it... might just take a while to find it is all...

Jun 26, 2009 | 04:12 PM

#13

duster

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Joined: Mar 2000

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From: North Carolina

OK... here is the factory tuning manual for the carb if I can get it to upload...

Gotta find the jetting chart for the 400 engine now

Attached Files

PolarisCarb_vmmanual.pdf (1.20 MB, 1448 views)

Jun 26, 2009 | 04:40 PM

#14

duster

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From: North Carolina

Quote:

Originally Posted by radjxf

OK, I called the local stealership: $60 for a needle and seat!!

Lastly, I just moved from MO (1100 ft elev) to MT (4040 ft elev) if that makes any difference.

Those little parts are high... I know... it's BS too.

Stock
230 Main jet - 35 Pilot Jet
6CEY6-3 Jet needle
Needle Jet - 0-6 (480)
Air Screw - 1.5 turns

Jetting for 3000-6000 feet

Below 0F - 250 MJ / 0.5 AS

0-40F - 230 MJ / 1.0 AS

40-80F - 210 MJ / 1.5 AS

80F+ - 195 MJ / 1.75 AS

Clutching for 3000-6000 feet

Shift Weight - S-55
Clutch Spring - White
Driven Helix - 2/2 or 2/1

(I think that's about stock? You may have better)

Jun 29, 2009 | 11:37 AM

#15

radjxf

Thread Starter

Weekend Warrior

Joined: Jun 2009

Posts: 19

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From: MT

Thanks a lot!

For some reason I quit receiving notifications to the topic

Hopefully the .pdf will explain stuff to where a carb newb can understand it.

Again, appreciate the help!

Jun 29, 2009 | 06:58 PM

#16

uncertifiedmechanic

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My home made pliers did get the job too.

Joined: Dec 2006

Posts: 397

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From: Nashwauk, MN

Give me your e-mail address, I'm sitting on a factory Poo manual for that Scrambler, I'll copy the specs page and send it to you

May 28, 2022 | 11:15 AM

#17

Himmm

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Joined: May 2022

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Quote:

Originally Posted by radjxf

OK, I called the local stealership: $60 for a needle and seat!!

So, I tore it down, cleaned everything out with carb cleaner, and blew everything out with air.

Now she'll idle at a lower rpm, much better than before. It does however have a bit of gas coming out of the vent hose that has a one-way valve in it.

So what needs to be adjusted and how on this carb?

I see a small brass "****" on the right side and a small brass screw.
I turned the **** all the way one way or the other, nothing changes?

Lastly, I just moved from MO (1100 ft elev) to MT (4040 ft elev) if that makes any difference.

Buddy,, never blow your carbs out with air.. you can blow dirt up into places it shouldn't be.. and also you can blow away the little seals and never even know it.