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Has anyone ever changed out the anti freeze on the 900 classic? If so, how did you do this ? Thanks for the Info
I've done it twice to my '08 900 Classic LT. It's very easy to do. I suggest you acquire the shop manual. It will take the guess work out.
Basically you:

Remove:
Left Side Coolant Tank Cover Bolt
Reserve Coolant Tank Cover

Remove:
Coolant Reserve Tank Cap. Turn over the reserve tank, and pour the coolant out.

Remove the fuel tank

Remove the radiator cap in two steps. First turn the
cap counterclockwise to the first stop. Then push and turn
it further in the same direction and remove the cap.

Place a container under the coolant drain bolt ( it's located on the bottom, R/H side of the engine), then remove the drain bolt. The coolant will drain from the radiator and engine.

Install the coolant reserve tank.
CAUTION
Soft or distilled water must be used with the antifreeze
(see Specifications section) in the Shop Manual's cooling
system section.
If hard water is used in the system, it causes scale
accumulation in the water passages, and considerably
reduces the efficiency of the cooling system.
Water and Coolant Mixture Ratio (when recommended)
Soft Water : 50%
Coolant : 50%
Freezing Point : −35°C (−31°F)
Total Amount : 2.2 L (2.3 US gt.)

Torque - Coolant Drain Bolt: 9.8 N·m (1.0 kgf·m, 87 in·lb)

Fill the radiator up to the filler neck with coolant (I suggest adding a "Water Wetter" that you can buy at any auto parts store.
NOTE:
○Pour in the coolant slowly so that it can expel the air
from the engine and radiator.
○Choose a suitable mixture ratio by referring to the
coolant manufacturer’s directions. (I use Honda's HP Coolant solution. It's pre-mixed and ready to pour in.)

Check the cooling system for leaks.

Tap the radiator hoses to force any air bubbles caught
inside.

Fill the radiator up to the filler neck with coolant.
Install the radiator cap.

Fill the reserve tank up to the “F” (full) level line with coolant and install the cap. Install the fuel tank

Start the engine and warm it up thoroughly until the radiator
fan turns on and then stop the engine.
Check the coolant level in the reserve tank several times
while the engine is cooling down, and replenish as necessary.
If the coolant level is lower than the “L” level line, add coolant to the “F” level line.
CAUTION
Do not add more coolant above the “F” level line.

Hope this helps.
 

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BeDee, This is good set of instructions. I've noticed several people talking about raising the front wheel. You don't mention that. Did you have the front raised or did you find it wasn't necessary?
 

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Has anyone ever changed out the anti freeze on the 900 classic? If so, how did you do this ? Thanks for the Info
•Remove:
Left Side Cover Bolt (you have to remove the seat to get to this bolt)
Reserve Tank Cover (It can get stuck on the rubber grommets, just use a slight force to get it off)
•Remove:
2 Bolts that secure the coolant reserve tank
Reserve Tank Cap •Turn over the reserve tank, and pour the coolant into the
suitable container.
•Remove the fuel tank.
•Remove the radiator cap in two steps. First turn the
cap counterclockwise to the first stop. Then push and turn
it further in the same direction and remove the cap.
○Place a container under the coolant drain bolt located on the bottom, R/H side, then remove the drain bolt.
○The coolant will drain from the radiator and engine. •Install the reserve tank.
CAUTION
Soft or distilled water must be used with the antifreeze
in the cooling system.
If hard water is used in the system, it causes scale
accumulation in the water passages, and considerably
reduces the efficiency of the cooling system.
I use Honda's HP Coolant, it's pre-mixed
Total Amount : 2.2 L (2.3 US gt.)
•Tighten:
Torque - Coolant Drain Bolt: 9.8 N·m (1.0 kgf·m, 87 in·lb)
•Fill the radiator up to the filler neck with coolant.
NOTE
○Pour in the coolant slowly so that it can expel the air
from the engine and radiator.
•Check the cooling system for leaks.
•Tap the radiator hoses to force any air bubbles caught
inside. •Fill the radiator up to the filler neck with coolant. •Install the radiator cap.
•Fill the reserve tank up to the “F” (full) level line with
coolant and install the cap. •Install the fuel tank. •Start the engine and warm it up thoroughly until the radiator fan turns on and then stop the engine. •Check the coolant level in the reserve tank several times
while the engine is cooling down, and replenish as necessary.
If the coolant level is lower than the “L” level line, add coolant to the “F” level line.
CAUTION
Do not add more coolant above the “F” level line.
 

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BeDee, This is good set of instructions. I've noticed several people talking about raising the front wheel. You don't mention that. Did you have the front raised or did you find it wasn't necessary?
I did not raise the front end. The drain plug and radiator is at the front of the engine and the lines and reserve tank are at the rear. I couldn't see any issue if a person wanted to remove the drain plug and wait to until all the coolant runs out then raise the front to see if any more comes out. The book does not call out to do this, but again I don't see any problem as long as you can get all the fluid out you can. I change my coolant every two years so the fluid I'm removing (or not removing) isn't that nasty.
 

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hmmmm....i'm on my third year without changing it (12k miles) looks like i may have a weekend project...lol
 

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Coolant change is recommended every 22.5k miles. I too have thought about changing my coolant but after checking it's freeze protection and condition I would hold off another year or at least till it appears to be discolored. Instead flushed the brake fluid & replaced spark plugs. Manual suggests changing BK fluid every 2 years & sparks every 7500. Somthing to think about.
 

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BeDee, What was accomplished by removing the fuel tank???? Is there something that the fuel tank is hiding. I need to change my coolant too this year.
 

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BeDee, What was accomplished by removing the fuel tank???? Is there something that the fuel tank is hiding. I need to change my coolant too this year.
You need to remove the fuel tank to get to the coolant fill cap (it looks just like a radiator cap).
 
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