I am in need of page ob-12 of the bandit 1250 service manaul. Mine which I purchased from Suzuki doesnt have the page in it. I need to bleed the coolant system and was looking for any particulars or different procedures from when I did my vfr 8oo. Any help would be greatly apreciated. I have just reinstalled the radiator and didnt know if there was an engine coolant plug to also drain the coolant fromthe block. Thanks in advance. Steve
The coolant drain and change procedure actually starts is on page OB-13 and ends on page OB-14 on my factory service manual, and chaning the coolant is very easy to do, as I just did mine again recently when I pulled the radiator off so that I could finally silicone the fan shroud to get rid of the very loud buzzing it made because of how it mounts to the fan bracket.
I highly recommend everyone to purchase a factory service manual if you are planning on doing any kind of work on your bike.
I also made up a new recovery tank plug out of black Delrin to fix an inherent problem with the stock rubber plug.
Here's the procedures for draining, filling and beeding the air from the cooling system.
Draining the coolant
Step 1. Place the motorcycle on the center stand
Step 2. Remove the fuel tank.
Step 3. Remove the radiator cap
Step 3. Remove the sprocket cover, then loosen the hose clamp on the water pump inlet hose
(lower large hose), and pull the hose off of the water pump housing and drain engine coolant
into a drain pan.
Step 4. Flush the radiator with fresh water if necessary.
Step 5. Reconnect the water pump inlet hose to the water pump, and tighten the hose clamp.
Step 6. Proceed to filling and bleeding the cooling system
Filling and bleeding air from the cooling system
Step 1. Support the motorcycle upright with the center stand.
Step 2. Place a rag underneath the filler neck inlet, then slowly pour a 50/50 mixture of distilled
water and silicate free engine coolant up to the bottom of the filler neck inlet. Pouring the
coolant in slowly helps to keep from trapping air in the system.
Step 5. Move the bike off of the canter stand, and slowly rock the motorcycle, right and left at least 10
times to help bring any trapped air in the system up to the filler neck inlet, so it can vent out of
the cooling system.
Note: The 10mm hex flange bolt on the the face of the water pump housing cover, is a air bleed vent that
can also be used to help bleed air from the water pump.
Step 6. After bleeding the air out, if the coolant lever has dropped, add more coolant to bring the coolant
level back up to the bottom of the filler neck inlet.
Step 7. Install the gas tank and start the engine up and allow it to come up to temp, so that any air
trapped in the system can expel out the filler neck inlet.
Step 8. Check coolant level again, and if needed add more coolant to bring the coolant level up to the
bottom of the filler neck inlet.
Step 9. Repeat steps 6 and 7 until no air bleeds from the filler neck inlet.
Step 10. Install and tighten the radiator cap securely.
Step 11. After warming up and cooling down the engine several times, check the coolant level in the
recovery tank is at the full mark on the tank with the bike sitting on the side stand, and if
not, add coolant.