I had this quad for about 3 years and never had an issue. Out of nowhere the quad started to get hot after hours of driving. I noticed the fuel injector red light was on then she temp light started blinking so I shut it off and tried to let it cool some. I limped it back to camp, hosed off the radiator and it seemed fine. Rode for a few more hours and all was well.

When I got home, I cleaned out the radiator really good making sure I got the backside which was caked up pretty good. Hoping that took care of it and short trips it was fine so took it on another trip. Same thing to where I rode for a few hours without issue then it overheated and injector light. Again, limped it back, sprayed it off and rode a decent amount more. I noticed it had a very slow drip from the overflow hose but almost what I saw others say as normal.

I bought it used and pretty sure it had the factory coolant so I switched the coolant out to rule that out as well as seeing it helped with others weeping out the overflow. It's still overheating unfortunately and the overflow is now dripping steadily. I didn't find the bleed screw but ran it a lot with the cap off and even put it at a real steep angle with the front up with the cap off as I read helps.

Looking for advice. My next plan was to replace the waterpump and seals. I don't think the coolant/oil seal is bad since I don't see any coolant in the oil so I was going to try to avoid it but while I'm in there I probably should just do it huh? I'm also reading about the thermos switch. I do feel like the fans may not have been on but they do come on when shutting it off. Honestly haven't paid that close of attention.

I'm helping a friend with his quad. The 4x4 stopped working and after some testing we found that it works when you push down very firmly on the relay. We cleaned all off the connectors and removed that "plug" from the relay box to make sure all the wires were seated correctly.

Some things are strange:
1) If you push on the relay to the left of the 4x4 the quad will start cranking to turn over the engine
2) If you hold down on the 4x4 relay, it will not go in 2x4. You need to stop pushing on the relay.

With the other relay cranking, I'm starting to think it's a different electrical issues such as the switch but the switch appears to be working fine if it wasn't for this issue, meaning when you switch between each mode it will not hesitate as long as you are pushing on the relay or what not.

Does anyone have experience with theirs acting the same?

Does anyone have a spare sitting around? Primary Spring 0951-1016 Gold/Yellow/Pink

I recently bought a 2018 CF500HO with low hours and miles. My first time taking it to real trails after riding for half the day it starting having an issue reaching top speed. The engine starts and idles fine and seems to rev fine. The machine accelerates but will not go above 11 mph in low and 18 mph in high (or close to those speeds-this was back in November).

This happened after I refilled and also went though a mud puddle (not that deep don't think it even got to my shoes). When I brought it home I assumed it was bad gas so I switched it out and the same thing. I took off the clutch cover and it wasn't muddy or anything. A little bit of dust but in my inexperienced opinion not much. I started it to see if the one way bearing was bad and all though the secondary was spinning I later learned that it will until the idle settles down so I warned it up and looked at it and the clutch did stop spinning when the rpm's settled down.

I didn't notice anything else that looked weird but after I washed it up and drove around trying to figure out what is wrong I did notice a rattling noise, the best way to describe it is similar to when a heat shield of a car is rattling just very faint and only on acceleration. Could be something in my compartments though but doubt it.

The only other details I have is the shifter needed adjusted since I got it. Very hard to switch gears and usually doesn't light up the gear you're in unless you get lucky. Lastly my friend also told me I could switch 4x4 on the fly so I did that but now learned it needs to be stopped. It wasn't (and still isn't) always engaging but it will occasionally.

Any ideas what I should check out for the limited top speed?