Anyone ever had their evo overheat. After riding mine about 30 min @ freeway speeds, it starts cutting out. Oil temp is showing about 220. I can let it sit for about 30 min. And starts just fine - until it get hot again. Any ideas?

 

220 is not overheating. that is normal temps in the heat of day. although the high end of it... sounds like you possibly have IGNITION ISSUES. if you either have the stock ignition or a crane HI-4 that hasnt been put in in the last year i would start there. the stock has a bad habit of going out and you can usually tell if you take off the ignition cvr on the end of the cam cvr you will see a plate with a square raised up section that looks like it has a milky looking sealer in it. if it is looking like it is melting out of there then its bad.

If not or if you have a CRANE HI-4 heres a trick for ya. take a hairdryer and with the ignition cvr off start the bike and blow the hairdryer on the ignition. when it gets hot if it starts to cut out then you found your problem

 

In addition to the above, check the ignition timing, and if it's jetted too lean, that'll cause it to overheat for sure.

It shouldn't overheat to the point of cutting out at interstate speeds. Is this something that just started happening?

 

I've checked the ignition. I've been running a compu fire ign for several years using a factory module. I did the hair dryer trick early on & have since replaced it.
It has historically never run hotter than 200. That's in slow traffic & Texas summers. When if cuts out, the cam cover is WAY hot. Oil temp at that point is at 220'ish. Once it cools to 200 or below, starts right back up.

 

what part of texas? im from ft worth. try taking the ignition cvr off and running it like that. if it takes longer or doesnt cut out that tells you the same thing as the hairdryer trick. the cvr holds in the heat. do you run synthetic btw? thatll lower temps a bit

 

The cam cover shouldn't be way hot. I've run my EVO with temps above 220 all day long with no issues. I think you have something going on in there.

 

I just replaced the cam, inner bearing, & pinion gear while troubleshooting the hot cam cover issue. I figured that was it.
Once I got it all back together, it started the overheating thing again. Oil pressure is normal. I'm stumped!!

 

oh yeah that would be Houston hot

 

bad crane was my problem. try a known good coil. also check the circuit breakers if you have them.

 

I'll try swapping coils - but don't see how that would make the entire cam cover get so hot??
I checked the cam & pinion bushings as well. They don't appear to be scorched .