Thought I'd start a separate page of information specific to the D&D Sno Pro 500/720 as I've just gone through all the legwork and expense and it's fresh in my brain.  There were a lot of phone calls, emails, shipping and investigation involved so hopefully this helps others down the road. 

I plan to update/edit this post over time.

You can no longer (at this time) get pistons or cylinders for this engine from Wiseco or D&D but the guy I worked with is looking into having 720 pistons made again.  If you have a 720 and happen to destroy a cylinder skirt (common) private message me and I will provide you with contact information for cylinder repair and pistons.

Here's a list of specific parts required to do the top end, miscellaneous parts and additions I did and at this point would suggest.

Also, it's crucial to have the proper Boondocker settings which vary based on year, ECU programming and power valves (see below)

  

Top End

9498P8487 Forged Pistons 84.87 Wiseco

3347TD Piston Rings Wiseco

S539 Piston Pins - Wiseco

CW22 Piston Pin Circlips -:Wiseco

3008-500 Piston Thrust Washers - Cat

3008-503 Piston Upper Rod Bearing - Cat

3006-423 Cylinder Base/Case Gasket -Cat

3005-283-A Power Valve Gaskets -Cat

3004-260 Water Manifold Gaskets - Cat

Y-pipe Gaskets (2-Bolt) - Custom Cut Copper

Dome O'Rings (Inner) - 75 Viton Size 153

Dome O’rings (Outer) - 75 Viton Size 49

 

Add-On's or Suggested

V3112-873C-2 - V-Force Reeds

5639-897 Scratchers - Arctic Cat

Side Panel Venting - Proven Designs

Temp Gauge - Koso

BR9EIX Spark Plugs - NGK

SMA-DPSSR-00-00 Vespel Slides - Yamaha

Boondocker Settings (per D&D)

2010 - 500/720 Non-Power Valve (without 2011 & up flash)

RPM LO MID HIGH

3000 -01 -04 -05

5000 -03 -06 -06

6700 07 05 -02

7300 10 10 02

7800 15 10 02 

8250 28 28 28

8700 45 45 45

Accel -06

Dur 20

Sens 08

 

2010 - 500/720 Power Valve (without 2011 & up flash)

RPM LO MID HIGH

3000 -03 -04 -05

5000 -03 -08 -08

6700 15 11 00

7300 15 15 02

7800 25 20 02

8200 28 28 28

8700 45 45 45

Accel -06
Dur 20

Sens 08

 

2011 & UP - 500/720 (or 2010 with reflashed 2011 & up programming)

RPM LO MID HIGH

3000 02 03 10

5000 04 03 08

6700 15 11 00

7300 15 15 02

7800 25 20 02

8200 28 28 28

8700 45 45 45

Accel 10

Dur 10

Sens 08

Boondocker Instructions https://boondocker.com/pages/instructions#NA_Snow_Control_Box

Boondocker Mount http://stores.mountainfithoods.net/fuel-controller-mount-boondocker-box/

Clutching per D&D

2010 SNO PRO 500/720

MAGNAFORCE 53 BASE, PLACE MAGS 3-2-1-1,  .030 SHIM,  RED PRIMARY,  STOCK SECONDARY

D&D 200-022

Red Primary Spring (170/330)

Gearing/Secondary Spring/Helix Options

Stock 2010 500 

Helix is 40/38 - 0648-805
Spring is Black/Blue 180/260 - 0648-790
20/46 gearing

Belt 0627-047

Stock 2010/2011 SX 600

Helix is 68-48-36/64-48-41 0648-789

Spring is Black/Blue 180/260 - 0648-790

20/46 gearing

Belt 0627-075

Stock 2010/2011 XC 600

Helix is 44/42 0648-809 (Venom # LW420453)

Spring is Black/Orange 180/280 0648-792 (Speedwerx CCH5-J-180-280)

20/39 gearing  

Belt 0627-076 

Stock Sno Pro 500 clutching information

For 2010 replace stock orange/black pile of shit primary spring with Speedwerx CCH5-D-148-290 Green White

For 2010's update to the 2011-2014 primary weights 0746-826 for smoother engagement

Always run a GOOD 0627-047 Belt 

2011-2014 Speedwerx primary spring for lower engagement CCH5-D-122-285  (I prefer the 148-290)  

Jackshaft Bearing Timken RA100RRB 

https://www.arcticinsider.com/sno-pro-500-part-iv-final-chapter/

https://arcticinsider.com/Images/Article/D&D 720 kit dyno sheet V2.pdf

 Arctic Cat # 1602-964 Brake Master Cylinder use Wilwood # 260-14347

Edited February 24Feb 24 by Crnr2Crnr

1 hour ago, Crnr2Crnr said:

no... it's not going there.

 

23 minutes ago, Badger** said:

 

idk what kind of can that is... but sign me up.

1 minute ago, Crnr2Crnr said:

idk what kind of can that is... but sign me up.

Good sport C2C

2 minutes ago, Badger** said:

Good sport C2C

no, I'm dead serious.  whatever that can is I want one to see if it will get more trails closed. 

note to self... 

2-1-1-0 

 

 

2008-2015 600 SX & XC gearing clutching from Cat just for reference.

going to try a 19/40 combo this year as 20/39 is just a bit too steep and isn't quite getting me where I want to be...  

Edit:  19/40 gearing is in.  Now I need snow to check and adjust the clutching.  

Clutch-gearing.pdf

Edited November 17, 20232 yr by Crnr2Crnr

Any of you guys with sno pros have a front bumper you'd be willing to sell or know someone who might have 1? I have a friend that bought a 500 for his kid and can't find a bumper anywhere

14 hours ago, Cat45 said:

Any of you guys with sno pros have a front bumper you'd be willing to sell or know someone who might have 1? I have a friend that bought a 500 for his kid and can't find a bumper anywhere

no... 

front bumpers, snow flaps and mid height windshields are nearly impossible to find and when they come up for sale they're gone quickly.  I'm looking at making windshields and into having bumpers (Fett style) made up to sell.  Snow flaps from PDP designs work.  https://provendesignproducts.com/product/arctic-cat-race-legal-snowflap-09-11/

 

10 hours ago, Crnr2Crnr said:

no... 

front bumpers, snow flaps and mid height windshields are nearly impossible to find and when they come up for sale they're gone quickly.  I'm looking at making windshields and into having bumpers (Fett style) made up to sell.  Snow flaps from PDP designs work.  https://provendesignproducts.com/product/arctic-cat-race-legal-snowflap-09-11/

 

Yeah that's what he's finding out. He's a pretty good fabricator, plans on trying a few different bumper designs of his own if he can't find 1 to buy

@Cat45... be sure to have him remove the secondary and check the jackshaft bearing.  super common issue and can wipe out both clutches if left alone when shot.  it's the weakest link in the whole sled... a cheap conveyor belt bearing at best.   

1 hour ago, Crnr2Crnr said:

@Cat45... be sure to have him remove the secondary and check the jackshaft bearing.  super common issue and can wipe out both clutches if left alone when shot.  it's the weakest link in the whole sled... a cheap conveyor belt bearing at best.   

Thanks, I'll pass it along. 

drive belts... as it came up again today 🙄

2008 Sno Pro 600 - 0627-073 (43.547" x 1.448")

2009 Sno Pro 600 SX - 0627-070 (44.25" x 1.448")

2009 Sno Pro 600 XC - 0627-073 (43.547" x 1.448")

2010 & 2011 Sno Pro 600 SX - 0627-075 (44.25" x 1.448") - discontinued

2010 & 2011 Sno Pro 600 XC - 0627-076 (43.547" X 1.448") - discontinued

2010 2011 2012 2013 2014 Sno Pro 500 - 0627-047 (43.547" x 1.448")

https://www.countrycat.com/arctic-cat-drive-belt

Edited February 23, 20251 yr by Crnr2Crnr