800 ho jetting with Boyesen reeds

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JoelK

Free Member

Apr 6, 2009

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• Sep 2, 2009

• #1

Looking for some advice on jetting/tuning carb after installing reeds/cages. Should a guy make any adjustments while carbs are off, or put them on and see how she runs? Engine/exhaust are all stock besides the new reeds and new rings. Thanks

 

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maxwellzx

Active member

Oct 16, 2008

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• Sep 2, 2009

• #2

we run stock jetting in all our HOs with reeds. but all sleds are differant. run it with stock jetting and pull the plugs and make sure its not leaningout rightaway then try and get a look at the piston wash after a good ride

 

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nathan36rams

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Nov 26, 2008

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Saskatchewan

• Sep 6, 2009

• #3

I just got my boyesen reeds/cages in for my 800 ho ptek. have not put them on yet but they recomend to drop to main jets 1 size, and evaluate your plug color.

 

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shredjim

Free Member

Dec 29, 2008

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White Salmon, WA

• Sep 6, 2009

• #4

I use boyesen reeds on my 2006 Summit 800 and late this season, I took off the stock large spacers between the carbs and engine and also changed pilot jets , by going from stock 17.5's to 20's it was a different sled. LOW END power like you could not believe. And, it was not backfiring any longer at the end of a long pull, and the hanging idle went away. Go to 20 pilots!!

 

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JoelK

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Apr 6, 2009

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• Sep 7, 2009

• #5

Main/Pilot Jets

So you are saying that you left the mains stock and changed out the pilots?

 

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dycker

Free Member

Nov 27, 2007

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• Sep 7, 2009

• #6

Boyesen jetting

I'm running 20 pilots with 390 mains, 1 full season without any problems with the current setup. I still do get the climbing idle when its really cold out though

 

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gman086

Well-known member

Feb 5, 2008

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Portland, OR

• Sep 9, 2009

• #7

JoelK said:

So you are saying that you left the mains stock and changed out the pilots?

Click to expand...

Yes but he is running an aftermarket can (SLP). You can safely jet down one size on mains IF you don't have any exhaust mods. Also you need to adjust out the fuel screws to 2 turns out (from closed) along with the larger pilots (could be your problem dycker). Boyesens need more fuel down low on the non-XP Doos.

Have FUN!

G MAN

 

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CATillak

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Nov 26, 2007

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dankorage

• Sep 9, 2009

• #8

Not too hijack,

But has anybody tried these setting with the VF3s and saw better throttle response??

 

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JoelK

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Apr 6, 2009

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• Sep 9, 2009

• #9

Pilots/Mains

Gman086, you are saying 20's/390's with the fuel screw adjustments? I do have stock exhaust. Thanks

 

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gman086

Well-known member

Feb 5, 2008

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Portland, OR

• Sep 10, 2009

• #10

JoelK said:

Gman086, you are saying 20's/390's with the fuel screw adjustments? I do have stock exhaust. Thanks

Click to expand...

Yes for non-Ptek Summits. The Pteks (2006 and later) have 440 mains stock.

Have FUN!

G

 

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dycker

Free Member

Nov 27, 2007

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• Sep 10, 2009

• #11

Boyesen vs VF3

The aluminum boots on the boyesen reeds was the big attraction for me. The stock and Vf3 boots are rubber and prone to cracking due to oxidation and the risk of a lean burn down. None of those worries with the boyesen reeds

 

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CATillak

Free Member

Nov 26, 2007

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dankorage

• Sep 10, 2009

• #12

My boots kept cracking till i swapped the VF3s in. I didnt want them because i ran boyesen on my cat, but 90 bucks for a clean pair i couldnt pass us. My boots are pretty burley on the VF3s, im not worried bout them

 

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gman086

Well-known member

Feb 5, 2008

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Portland, OR

• Sep 11, 2009

• #13

CATillak said:

Not too hijack,

But has anybody tried these setting with the VF3s and saw better throttle response??

Click to expand...

VF3's don't seem to benefit from jetting changes in my experience so just stay standard. They will give crisper throttle response regardless.

Have FUN!

G

 

Last edited: Sep 11, 2009