how to fill radiator coolant on Yamaha Motorcycle

Here is a simple how to in replacing your coolant, flush your radiator.
You will need to remove r & l mids and lower fairings.

Tools needed:
phillips screwdriver
distilled water
coolant - water wetter - engine ice, whatever floats your boat
large plastic container to collect coolant.

**Note ** Coolant is poisonous so dispose with care and not down the drain. Take it to a hazardous collection area. As it has a sweet odor, pets can get poisoned on it unknowingly so be careful.

Pic 1, once the sides are off, open radiator cap on the right side. You can elevate the bike if you want. Makes removing the fairings easier. Either use a funnel or remove the ram tube.
Pic 2, loosen the hose clamp. You can mess with the 8mm plug but I don't.
Pic 3, give it a good wiggle.
Pic 4, place tub under bike and pull off hose.

Things to watch for, oil, rust, and particles. Oil means that the o-ring is probably not sealing well, so look into getting the o-rings replaced. Rust will make the coolant color change towards brownish. Flush engine as best you can with distilled water, then top off with coolant/distilled 50/50 water mix. Particles will be found.You will usually see some black flecks floating around. Not really a big deal as long as it doesn't clog anything. If you regularly flush your radiator, you'll be fine.

To flush the radiator, reattach and tighten hose. Fill the radiator with distilled water to the top. Run motor up to temperature or go for a short ride. Come back and empty out again following the above steps. You can do this as many times as you feel necessary. I only flush once if the color of the removed coolant has a clear green shade to it. Coolant and distilled water prevent corrosion from taking place. Never use tap water as it has minerals and salts that will destroy your engine.

You can mix coolant and water in a used container to a 50/50 mix. In some areas temperatures never get close to freezing so bike needs to run mostly water with about 20-30% coolant. I also eyeball it when I pour it into the radiator counting 10 seconds, water, then coolant then water. Fill to the top. Fire up engine and let it warm a little, coolant level sometimes drops. Add more to the top and cap. Check reservoir for the proper levels. Get in there with either a pump with a clear tube or a turkey baster. Then you're done.




Never Remove the Radiator Cap when the Bike is Hot! It will spray Hot Liquid all over you!

Drain the coolant from the radiator by removing the drain bolt on the water pump (right side engine, where the radiator hose goes to). You then have to drain the coolant reservoir by either A) take off the coolant reservoir to drain it or B) use a suction pump to suck the remaining coolant from the reservoir. It is located near your master cylinder reservoir, small plastic tank with a rubber cap and tube.

Fill your radiator by removing a lock bolt for the pressure cap and then filling it to the neck with your coolant of choice. Fill the coolant reservoir to the line marked on the back of the tank. Take the bike for a ride and get it up to operating temp, park it and wait until it cools. Check the level of coolant in your reservoir and add/remove as necessary.

There is a small metal bracket that goes under the cap which the cap retaining bolt screws into.
It only goes on one way, right side hole (in cap), insert the bolt. The tab of the locking piece faces upward(towards the front of the bike). Snug up bolt.

I recently did a coolant flush/change . I drained the original coolant from the bike and replaced it with water. Ran the bike for a few minutes to cycle the water through the cooling system and drained it. Repeated this until the water remained clear after running though the system. I then filled the radiator with a 50/50 mix of coolant/water (came pre-mixed) and ran the engine until up to proper operating temperature. I let the engine cool and checked the coolant level, added more if necessary.

After the coolant flush/change, I noticed the radiator fan turning on less often and the bike running cooler. My bike certainly needed this!

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