dant849

I wired mine to run all the time

Joe, have you had issues with the transmission linkage? My shifter won't go into low and I read that the linkage is adjustable.  Any experience with that?

2 hours ago, T-boss 410 said:

So, you just leave the thermoswitch in the radiator? I take it you used enough tape to basically waterproof it?

Thanks 

So I think I got lucky and got all the air out. It's circulating now and I jumped the fan so it would run whenever the key is on to help keep it cool. Currently running a cool two to three bars out of five.  Thanks for the help!

24 minutes ago, Joe Breaux said:

there is another vent on the top of the head , you may have to do it several times.. but if you have air, your head gasket is toast, and water will stop circulating in a few miles  again ... have you checked for water in your oil? 

Thanks for your reply, no water in the oil. But there was oil in the coolant. I found out the hard way that when you pull the water pump that you also drain the oil as they seem to share common seal. at any rate, the oil looks good. Can you describe the process that you go through to relieve the system of air in detail? I appreciate it

40 minutes ago, T-boss 410 said:

I hope this is something you don't already know, and if it is, I apologize. I had sent an email to Brandon Beaver, a tech for Massimo, asking about the ECU programming. According to him, the ECU isn't responsible for when the fan comes on, but it's a thermoswitch that's mounted on the radiator. He says that a thermoswitch that is rated at a lower temp can be purchased (although he didn't mention where) to replace the OEM one. He also advised the the temp is set at 215-220, and that Yamaha has theirs set at 217, and that range is normal in the powersports industry.

Hope this helps, but if it doesn't, just ignore it. I was just trying to give an alternative to the fan fix.

I appreciate your input. I replaced that switch back several months ago when I first got the machine and it was running hot then. Turned out to be a stuck thermostat that time. The fan works when I put 12 volts to it so I believe what is happening is that the water in the radiator is not warming up therefore the fan is not coming on. Put a new water pump in over the weekend. I guess I'll try to burp it again

3 hours ago, Joe Breaux said:

The reason your radiator is not hot is because you have steam/ air blocking the system and water is NOT CIRCULATING.. So theres no hot water to cool.. radiator isnt hot, But your engine is boiling .. If you bleed the air out of all vent screws, the water will move again  if your pump is good but the air leaking into system from blown head gasket will block it again in just a couple miles .  I just went thru all that and so have  a lot of us.

thanks Joe... I know that there's a vent screw at the bottom of the water pump. Aside from taking the cap off of the radiator and the Overflow Reservoir are there other places that air can be bled?

my radiator never gets hot so I don't understand how the fan can make a difference. The fan cools the radiator, right? I don't believe that the water ever circulates through my engine or the radiator and the hoses would warm up, wouldn't they?

This looks to be a pretty common topic and I've had issues with mine overheating since I got it back around the end of 2019. Started running hot again, thermostat was not opening and they sent me a new one. Installed that, burped the system for air all to no avail. Next in line is the water pump to replace, they sent me a water pump and when I got the old one off it was not turning freely to say the least so I'm thinking that could have been my problem. My issue now is getting the slot in the water pump shaft to line up with the tab inside the engine of the machine. Any tricks to doing this? Thanks in advance

Hello, just took delivery of this unit today and temp gauge shows it's running hot . Full of coolant. Fan isn't coming on although I can jump it. Relay and fuse are good. What else can it be? Thanks in advance!