WestOz has a point here.
The red light will be the first thing you notice so it might as well switch the fan as a fall back position.
But it's not the way to go as that red light is saying stop and check as something is not right.
(maybe its saying the fans not working)
No issue with connecting both the switch and the lamp in parallel though.
Use the switch as you see fit and the red light thermo switch will be there to catch you.

But seriously, get the fan thermo switch sorted.

 

Why in the world would you spend $500 on a big piston and not spend $75 to protect it? And then cobble up a toggle switch??

 

Just a nitpicky point, Learjet. If we we were talking about a KLX250E, then you diagram would hold true about no fuse for the fan. There IS a fuse for the fan on the KLX250S, although that's not what's causing his problem. It's one of two fuses in that flat shaped, black plastic fuse holder under the seat the towards the back of the bike. The other fuse in that same container is for lights (head, tail and number plate).

 

That's what I don't understand.... the waterjacket on the big bore is TINY (especially on the 351) so in theory you should need MORE fan more often than with a stock bike... sure you can just flip on the fan and leave it going but I'd think you'd burn up the fan alot faster. Plus what if you forget, etc. Not trying to tell people their business but if you drop coin on a big bore kit then damn just fix the problem instead of rigging it up and calling it honkey-dorey...

 

Well thing is theres theory and theres application.

Just cuz one may think it needs it doesn't necessarily mean it does. We don't know what kind of air that fan moves and how much resistance that is. If you toggle it on all the time it may hold back more air than what would normally move at say 25 MPH or so.

So, if your 1st gear in the woods for a half hour and its 85 degrees with 90% humidity, then OK...I'd buy that for a dollar. Perhaps thats the idea thats the idea intended here. But if your out on the road and your crusing at 60-70 MPH....Forgeddaboudid.

It seems with me and stories of others, provided nothing was wrong with our stuff, the fans barely ever came on. Now, someone like CLiffsta, who lives in the damn swamp, life may be different. But I know here in the Northeast, its not a problem. Mine is off. Less weight, less crap to break, easier to work on, more room to move in there, more flow through the radiator. I don't miss it. MX bikes don't have fans, and they get ran harder at slower speeds.

 

Everyone needs to chiiilll

The fan toggle switch is perfect for me. The fan barely ever comes on except in the dead heat days of summer, and when in very tight technical crap. If I'm in the woods putting around in 100°, I will turn the fan on.

This is a temporary thing that I will deal with till winter when I do my annual winter overhaul. I'm too busy riding to deal with something that could be fixed in two mins with a switch I had on-hand already

Go out and ride people.

 

Um......who is pissed off that your addressing?

 

Im new to my Kawasaki Vulcan 750. How did you connect toggle switch to make fan work?.. please help

 

Please help i have a Vulcan 750 and need to know how to connect a toggle switch to cooling fan. I have one wire coming from fan switch one wire from temp sending unit.

 

Post the wiring dia for the vulcan.