Honda CX 500 Forum banner
1 - 20 of 32 Posts

·
Registered
Joined
·
798 Posts
Discussion Starter · #1 ·
Seem to fit well. I dont think Im going to have to move the radiator out, or shave the camshaft. I dont have the bike even close to ready to test, but It looks like I have almost a centimeter extra room.



Plus I got two of them for $35.
 

·
Registered
Joined
·
2,601 Posts
Seem to fit well. I dont think Im going to have to move the radiator out, or shave the camshaft. I dont have the bike even close to ready to test, but It looks like I have almost a centimeter extra room.



Plus I got two of them for $35.


Hmmm, I'll know if the particular Ninja fan I got will fit this weekend, if not I'm going to be looking for one that does not require altering the camshaft in any way.



Where'd you find them? On eBay or just get lucky? I've about given up trying to buy anything from our local salvage yards due to their thinking everything they have is gold.
 

·
Super Moderator
Joined
·
2,853 Posts
Could you tell us about the dimensions? Circumference, thickness, # of blades?

Maybe a picture of it mounted?
 

·
Registered
Joined
·
851 Posts
I know it can sound stressful to CUT THE END OF THE CAM OFF! But it's a doodle, nothing to it I did mine with a die grinder and a small cut off wheel. The outer most part of the cam mounts the mechanical fan and the outer most part (last 1/4") is NOT threaded to hold said fan on. So it's no big deal if you cut the dang thing off. You could still re-mount the old fan with zero problems if you deside to do so.

Cheers, 50gary
 

·
Registered
Joined
·
2,601 Posts
Could you tell us about the dimensions? Circumference, thickness, # of blades?

Maybe a picture of it mounted?


Love to see some pictures of the fan too, as well as dimensions and where you were able to mount it. If this older Ninja fan I found doesn't work out I'm going to need something and wouldn't mind buying your extra if you still have it and it fits as well as you say it will.



Still up in the air on mine, we're hoping to get together to work on my bike a little more this weekend. Still waiting on some parts though but I am about prepped for painting.
 

·
Registered
Joined
·
816 Posts
I was also thinking about the Ducati fans as they have been mentioned and used by others. Then I found out about the Kawasaki fans and picked up a ZX6 for $4.99 (plus a 10 spot for shipping
). Got the N.O. thermal switches the other day and plan to put mine together real soon. It remains to be seen if I will need to shorten the cam shaft end.
 

·
Registered
Joined
·
2,601 Posts
Good news is the first prototype of the fancy electric fan conroller goes together this weekend. I ordered enough parts to build three to start with, going to want to test it out on more than one bike before releasing the circuit & eventually selling it if it works as well as I think it will.



Wish I had about a whole weeek to spend laying out this PC board with all the little circuits I'm wanting to include on it, several of which are for our bikes.
 

·
Registered
Joined
·
798 Posts
Discussion Starter · #12 ·
Sorry, I keep forgetting to shoot some pics. I should be working on the bike later so hopefully then. I plan to use a generic aftermarket mount kit, but apparently no stores I. My town carry them.
 

·
Registered
Joined
·
2,601 Posts
I think Autozone has them. Most people use the plastic zip strips that are used to mount aftermarket transmission coolers.
 

·
Registered
Joined
·
798 Posts
Discussion Starter · #14 ·
I ordered some off eBay. The guy at advance auto looked at me like I was nuts, then tried to sell me a whole new fan. Napa was a little better, the guy knew what I was talking about, they just didn't have it.
 

·
Registered
Joined
·
1,219 Posts
I know it can sound stressful to CUT THE END OF THE CAM OFF! But it's a doodle, nothing to it I did mine with a die grinder and a small cut off wheel. The outer most part of the cam mounts the mechanical fan and the outer most part (last 1/4") is NOT threaded to hold said fan on. So it's no big deal if you cut the dang thing off. You could still re-mount the old fan with zero problems if you deside to do so.

Cheers, 50gary


Agree. Took me about 25 seconds to sheer the end off.
 

·
Registered
Joined
·
422 Posts
Using a mid-90's ZX6 fan - no clearance issues, and I didn't cut the end of the cam off. Just gotta position it properly.



Instead of buying the zip things to mount, I just used zip ties
 

·
Registered
Joined
·
816 Posts
Using a mid-90's ZX6 fan - no clearance issues, and I didn't cut the end of the cam off. Just gotta position it properly.



Instead of buying the zip things to mount, I just used zip ties


Good to know that there doesn't need to be any trimming with the ZX6 fans. I was thinking that regular zip ties would work for testing and temporary fitment. I have some spare PC case covers I could cut/drill/grind/paint and make a nicer mount that would slip in between the CX's fan shroud & radiator using the 4 existing holes for mounting. Since I have a spare radiator and shroud this can be fitted up and swapped with the existing radiator.



Does anyone have a substitute for the plastic drain plug for the bottom of the radiator? Just looking to find another one (I could use the one I have on the bike obviously). I may have to take in the plug to an auto parts store and see if there is something that will work if we don't have something on the FAQ list.
 

·
Registered
Joined
·
798 Posts
Discussion Starter · #19 ·
Heres some pics. Keep in mind I dont actually have it mounted yet.



To give you an idea of actual size





Fins





Note: This will have to come back some because the fins are against the radiator in this pic, but the metal piece doesnt have to be in line with the cam end, so there is more room than I know what to do with.





The only part less than ideal about these fans is how the mounts sit.

 

·
Registered
Joined
·
269 Posts
Looks like you have room to mount Two if you spaced them right.

Is that true?



I also found this link that someone is suggesting you should have 20deg or more drop across the radiator (coolant temp) and if you have a 180deg thermostat, you want a outlet temp of no more than about 170deg.



http://yarchive.net/car/radiator_diagnosis.html



So if our fans turn on somewhere near 170deg outlet temp, it should be just fine.

(call it 77c )



The BWD fan switch for the '83 Honda Civic fits in the radiator just fine, but the stock thermostat for that car is a 195f, and the switch turns on the fan at 198f and off at 188f.

that would put your engine temp at about 220-225f when the fan comes on.



Not to hot for most motors I have run, but about 20-30 deg hotter than designed on a GL650.



Anybody have a loose 650 fan switch they could check the "on" and "off" temp on?

I tried my old one, and got a 350ohm resistance "on" at 180deg. that temp would work fine.

but then it failed 3 min later and now doesn't work at all. always open. so I don't know how it is Suppose to work. lol
 
1 - 20 of 32 Posts
Top