bottom end 440/ 600 swap

2

2003sks700

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Aug 26, 2010

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• Nov 22, 2012

• #1

hi guys i need help i want to put a 600 crank in the 440 bottom end with 600 cylinders because then i could run airbox and it would make everything easier and fit right but what do iuse for carb boots to fit rack carbs or do i run 440 crabs jetted like a 600? help

 

B

BB454

Free Member

Nov 26, 2007

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Salt Lake City

• Nov 23, 2012

• #2

boots

What chassis? The 600 boots will bolt right on. You should be able to find jetting for those 440 carbs for a 600 as well.

 

2

2003sks700

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Aug 26, 2010

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• Nov 24, 2012

• #3

iqr and the 05 440 intake is wider than stock 600 so the wont fit and i want to run rack carbs

 

L

LoudHandle

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Apr 21, 2011

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Valdez, AK

• Nov 24, 2012

• #4

The '05 and older 440's are just a 600 case that has been milled shorter to copliment the shorter rods. So the older boots and rack carbs will go right on. The newer 600 race engines are based on the CFI crankcase.

 

2

2003sks700

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Aug 26, 2010

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• Nov 24, 2012

• #5

its an 2001 crank from a ves motor thats going into the 2005 iq 440 cases the intake , reeds and boots are different on the 2005 cases so the 2001 carb boots reads wont go on there smaller. does anyone make a carb boots for this application

 

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LoudHandle

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• Nov 24, 2012

• #6

Be aware that the changed the gear ratio on the water / oil pump drive also between those years so you will need to swap to the older water pump drive. The '05 is the newer HO dirived case. The 440 is still a shorter deck hight so you will need to shim the cylinders up to get the port timing right. You will need the pre CFI 600 carb boots and rack carbs if desired. Although the center to center did not change from VES engines to HO the reeds got larger. Hope this helps

 

2

2003sks700

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Aug 26, 2010

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• Nov 24, 2012

• #7

shouldnt the 600 cylinders slide right on without decking? if i have to deck how high do i go

 

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LoudHandle

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• Nov 24, 2012

• #8

I don't remember off the top of my head. Hopefully someone will chime in on that. There were a lot of shops building short rod 600's back when people were throwing away the 440 bottom ends.