91 ZX600-D2
(got the rusty tank all cleaned and lined)

Just ran into a new problem.

Son went out for a ride to the grandparents house.
Temp outside about 55, after dark, highway speeds (70 mph).
Bike idles to get warmed up, runs like a champ. Several miles later, bike temp begins to fall, goes down to "cold" and stalls out.
Off theside of the road, let it warm up, take off, a mile later, bike temp starts to fall, goes down to "cold" and stalls.
Repeat.

I didn't realize these thing were that touchy on running temp.

Is it a bad thermostat? Like in a car?

Reservior is between hot/cold level?

HELP!

Mike

 

Sounds electrical related cougarkid.

 

That is freakin weird.

 

Yeah, I agree with Drag; it's got nothing to do with the thermostat. I would guess you might have some air in your coolant path which is becoming a factor after your thermo opens. The air will expand when it gets hot, and cause your bike to stall out. The temp gauge drops because there's no fluid for the sender to "read." Bleed the lower coolant bleeder valve, then leave your rad cap off until the bike gets up to temp and the thermo opens. Add coolant to the lower lip of the thermo/rad cap area, and keep it running until you visibly see the coolant circulating. The air will likely rise and dribble some of the coolant out, so prepare for some overflow.

 

Okay,

System has been closed forever, as far as I know. Bought it used with 20000 miles on it.
Bike has never been ridden in colder temps by us (55 degrees at 70 mph after dark= what? 30 degrees).

Pulled the faring cover and checked the coolant. Reservoir is full and filler is full to the top. Decided to pull the thermostat. Not sure what the temp is supposed to be, but this is the FIRST thermostat that I have EVER been able to push open with just my fingers. Good or bad, it is getting replaced!

In hind site, it has been running a bit on the cool side since we got it and started ridding it.

Thanks for the suggestions. I barely lost any antifreeze when I pulled the thermostat. I will be extra carefull when I replace it and fill it.

What temp is the thermostat supposed to be?

Thanks,
Mike

 

 

Thanks for the info! Typical 175-180 thermostat.

As I said, Never been able to open one with my fingers!

I can get that cheaper at the parts store rather than the $30.00 that Kawi dealer wants for it.

Thanks again,

Mike

 

If that bike has 20K miles on it and the coolant has never been changed, UGH. While you're messing with the thermostat, flush the system and put in fresh!
Has the oil been changed?? Plugs??

 

Antifeeeze looks pretty good, green and clean, but will change it out.

Got the new thermostat - $4.99 at Oreilly's. Goes is tomorrow!

Plugs, oil, lube, carbs set 200 miles ago.

Mike

 

Should run like a new one!!