Need help setting up 340 Indy's for my kids

G

Graveyarder

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Nov 28, 2007

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St. Maries, Id.

• Feb 9, 2016

• #1

I just purchased a couple 340 Indy sports for my kids. They are an 87' and 90' model year, both run just need to be tuned a bit. How are you guys setting up the carbs on these sleds? We run 3-6,000' for the most part. I've read through a few of the other threads that had newer 340's. Also would like to get some plastic skis for them as well. Any help would be appreciated. Thanks!

 

Merlin

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Medicine Hat, AB

• Feb 10, 2016

• #2

Graveyarder said:

I just purchased a couple 340 Indy sports for my kids. They are an 87' and 90' model year, both run just need to be tuned a bit. How are you guys setting up the carbs on these sleds? We run 3-6,000' for the most part. I've read through a few of the other threads that had newer 340's. Also would like to get some plastic skis for them as well. Any help would be appreciated. Thanks!

Click to expand...

Not sure whether the carbs on the Sports are the same as the Lites?

I don't have my memory stick with the service manual but VB posted a picture of the jetting chart under the hood of his '94 Indy Lite here: http://www.snowest.com/forum/showthread.php?t=405753

I'm running 125 main jets(same as VB) at the same altitude range that you are planning to tune for. I haven't had much opportunity to tune mine but the sled still feels fat & the couple times I did look at the plugs they were plenty rich. Pretty sure I could run 120s if not even 115s. Kids will never hold it pinned long enough to burn it down anyway. LOL!

Assuming the carbs are the same you're probably safe to start with 125s & go from there. That said, none of this info. is a replacement for proper tuning. Gotta check the plugs!

 

Snow Duck

The Great and Mighty SnowDuck

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• Feb 11, 2016

• #3

I run 120s and we run the 6 to 9000 ft here..i put in a gold spring with the 10m whites for the extra snap to take off..as Merlin states check plugs and as VB posted look under the hood for that decal it is on all older Polaris sleds.


ahh plastic skis I run the 99 to 02 rmk skis and they work great but thinking of putting my extra set of grippers on it or going with some original gen 1 Simmons..

 

V

volcano buster

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Nov 26, 2007

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Stayton Oregon

• Feb 11, 2016

• #4

See if these help you.

I used my iphone so I anticipated the file size to be huge. They don't appear to be so they may not be very clear.

 

Merlin

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• Feb 12, 2016

• #5

Holy cow, thanks VB!

Big difference in jetting compared to the Lites!!!

 

G

Graveyarder

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St. Maries, Id.

• Feb 24, 2016

• #6

Thanks for all the great info!! Much appreciated. Now if it would just snow again! I will be checking the plugs for sure. Kinda spoiled since I'm used to tuning my sled on the fly. lol

 

A

AZ800

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Black Diamond, WA

• Feb 25, 2016

• #7

Any plastic skis you can pick up will be better than the sticky narrow steelies, but I second the suggestion for dual runner skis like Simmons or Skidoo skis.
By chance I ended up with a set of each when setting up my kids' sleds and they dart much less on the packed trails and made the kids feel more comfortable driving when they were less experienced.