Water cooling system

[Confrontation]

I was warming up my bike this afternoon , I had adjusted the idler so the bike was at 1500rpm (I need to get a tune up) , I came back to the bike to see the front exhaust was glowing red hot also the radiator was warm on one side and cold on the other.
The thermostat sensor is broken and I'm getting a replacement.
The fans were also not working (im guessing thats to do with the thermostat) and the coolant seem to be in the coolant tank.

Guess Im wanting to know is it all to do with the thermostat sensor not working?

[Akzle]

I was warming up my bike this afternoon , I had adjusted the idler so the bike was at 1500rpm (I need to get a tune up) , I came back to the bike to see the front exhaust was glowing red hot also the radiator was warm on one side and cold on the other.
The thermostat sensor is broken and I'm getting a replacement.
The fans were also not working (im guessing thats to do with the thermostat) and the coolant seem to be in the coolant tank.

Guess Im wanting to know is it all to do with the thermostat sensor not working?

fuck the sensor. rip the thermo out. maximum cooling. all the time.

[Drew]

I was warming up my bike this afternoon , I had adjusted the idler so the bike was at 1500rpm (I need to get a tune up) , I came back to the bike to see the front exhaust was glowing red hot also the radiator was warm on one side and cold on the other.
The thermostat sensor is broken and I'm getting a replacement.
The fans were also not working (im guessing thats to do with the thermostat) and the coolant seem to be in the coolant tank.

Guess Im wanting to know is it all to do with the thermostat sensor not working?Glowing red hot header, is possibly a sign that the timing is fucked. It shouldn't get that hot without a very serious thrashing.

Could also be a sign of something much worse, but get the timing checked before anyone tries to pull the head off.

[Drew]

fuck the sensor. rip the thermo out. maximum cooling. all the time.Not your best advice there Pikey.

Running a motor too cold, can fuck it big time. A Hyosung in particular.

[Confrontation]

Glowing red hot header, is possibly a sign that the timing is fucked. It shouldn't get that hot without a very serious thrashing.

Could also be a sign of something much worse, but get the timing checked before anyone tries to pull the head off.

What could be worse?

[Drew]

What could be worse?Burnt out valves, skipped cam timing. Bad stuff.

Ignition timing on your bike shouldn't be adjustable, but those crazy Koreans have made stranger decisions when desiging the bike.

Before we get carried away, how mechanical are you?

[caseye]

Argh! do not listen to Akzle. bloody Waikatoians don't know one end of a motobic to annudder.
I've just been through a very similar thing with the wife's Nonda.
Do replace the thermostat.
Do take the radiator out and have it flushed.
Do check the temperature actuating switch screwed into the radiator.
Do have your radiator cap checked for holding pressure and if suspect. Do replace it as well.
I was told that this bike had a head gasket problem and the engine needed to come out and the heads removed and gaskets replaced, approx $1500-2000.00 worth of work.
Just had the carbs properly balanced, air box fitted correctly and all things that were a little bit wrong returned to speck by George the Mobile Motorcycle Mechanic this afternoon.
Bike is running like a Swiss watch now and I'm sure will not give us anymore problems.
So if you are up to it try doing what I've just done, otherwise give George a call on 021837697 and he'll do it for you.

[Confrontation]

Burnt out valves, skipped cam timing. Bad stuff.

Ignition timing on your bike shouldn't be adjustable, but those crazy Koreans have made stranger decisions when desiging the bike.

Before we get carried away, how mechanical are you?


Im not overly mechanical , But I just put a new piston , rings and second hand head (with valves already in) on the motor over seen by a retired engineer and with the odd 2 cents worth from an engineer at work who just done the timing for me.
It has had 3 short 10 minute trips before seeing this , one being 6am this morning.

[Confrontation]

Argh! do not listen to Akzle. bloody Waikatoians don't know one end of a motobic to annudder.
I've just been through a very similar thing with the wife's Nonda.
Do replace the thermostat.
Do take the radiator out and have it flushed.
Do check the temperature actuating switch screwed into the radiator.
Do have your radiator cap checked for holding pressure and if suspect. Do replace it as well.
I was told that this bike had a head gasket problem and the engine needed to come out and the heads removed and gaskets replaced, approx $1500-2000.00 worth of work.
Just had the carbs properly balanced, air box fitted correctly and all things that were a little bit wrong returned to speck by George the Mobile Motorcycle Mechanic this afternoon.
Bike is running like a Swiss watch now and I'm sure will not give us anymore problems.
So if you are up to it try doing what I've just done, otherwise give George a call on 021837697 and he'll do it for you.

Where is George located?

[Drew]

Im not overly mechanical , But I just put a new piston , rings and second hand head (with valves already in) on the motor over seen by a retired engineer and with the odd 2 cents worth from an engineer at work who just done the timing for me.
It has had 3 short 10 minute trips before seeing this , one being 6am this morning.The plot thickens.

Was the piston and head you did, the one with the glowing pipe?

[Confrontation]

The plot thickens.

Was the piston and head you did, the one with the glowing pipe?

Yes it was

[Drew]

Yes it wasMmmmkay.

I would probably flag looking at the ignition timing then, and whip the rocker cover off to check the cam timing.

The rough running could be caused by advanced exhaust valve timing, which would also cause the red hot header.

[Confrontation]

Mmmmkay.

I would probably flag looking at the ignition timing then, and whip the rocker cover off to check the cam timing.

The rough running could be caused by advanced exhaust valve timing, which would also cause the red hot header.

I will look at that , But as the timing has just been done and had 30mins running , what would throw the timing out?

[Akzle]

Where is George located?
right behind you.

Running a motor too cold, can fuck it big time. A Hyosung in particular.

a hyosung you say.

fuck that. bin it and buy a real bike.

[Drew]

I will look at that , But as the timing has just been done and had 30mins running , what would throw the timing out?

Not being timed right, (even mechanics get that wrong from time to time), or a camchain tensioner not being adjusted, (or unlocked after assembly) properly are the obvious ones.

[Confrontation]

Not being timed right, (even mechanics get that wrong from time to time), or a camchain tensioner not being adjusted, (or unlocked after assembly) properly are the obvious ones.

So the thermostat is not the issue?
it was awfully hot.

[Katman]

Did you check the inlet manifold rubbers when you had the carbs out?

I've seen split manifold rubbers on Hyosungs which will cause that cylinder to run lean and therefore hot.

[Drew]

So the thermostat is not the issue?
it was awfully hot.Could be an issue as well.


Did you check the inlet manifold rubbers when you had the carbs out?

I've seen split manifold rubbers on Hyosungs which will cause that cylinder to run lean and therefore hot.That's a better option than mine!

Could that really let it run a red hot header at only 1500rpm though?

[ducatilover]

What kind of bike? The Hyo 250 isn't water cooled.
Katman and Drew are on to it.
I highly doubt the ign timing is out, cdi unit would fail, not change timing (you'd hope) and cam timing would make it run like a POS. It'd have to me insanely lean to get a red hot header too. :eek5:

[Drew]

What kind of bike? The Hyo 250 isn't water cooled.


Well there ya go. I was even picturing the motor with cooling fins in my head.

Good thinking that man!

[Confrontation]

Did you check the inlet manifold rubbers when you had the carbs out?

I've seen split manifold rubbers on Hyosungs which will cause that cylinder to run lean and therefore hot.

They are in good condition

[Confrontation]

What kind of bike? The Hyo 250 isn't water cooled.
Katman and Drew are on to it.
I highly doubt the ign timing is out, cdi unit would fail, not change timing (you'd hope) and cam timing would make it run like a POS. It'd have to me insanely lean to get a red hot header too. :eek5:

Hyosung GT650R (Carburetor)

[Drew]

Hyosung GT650R (Carburetor)Sweet. Advice still stands.

[nodrog]

PM drunkenmistake, hes an expert on water cooling.

[pete-blen]

If I leave my XTR idleing for 15mins it will turn the
right header pipe red... As thats the pipe the AIS
is on "AIS = Air Injection System" some clean air
bullshit to burn any fuel that enters the pipe..

[BMWST?]

the exhaust gases from an internal combustion engine are very very hot.Google it.Then google what temperature it takes to get steel red hot.You will find that a poorly tuned engine can have exhust gas tempertaure of 1600 deg F .Only 975 deg F is red hot steel visible in daylight.

[DrunkenMistake]

PM drunkenmistake, hes an expert on water cooling.

;)..


Has anyone suggested checking the plugs?....

[Confrontation]

;)..


Has anyone suggested checking the plugs?....


What do I need to check on the plugs??

[DrunkenMistake]

What do I need to check on the plugs??

283928
Would start with that, my old Hyo 650 done something similar, the front pipe did not glow red however but it was getting silly hot,
Front plug was rooted, I dumped the coolant and changed the plugs as part of a service and it seemed to fix it up,
A new Thermostat wouldn't hurt but I would start with the easy stuff before spending money where it's not needed to be spent.

A mate also had a similiar problem with his kwak, he had less than 1M ohm on the plug that was related to the cylinder that was glowing the front pipe.

[Drew]

Would start with that, my old Hyo 650 done something similar, the front pipe did not glow red however but it was getting silly hot,
Front plug was rooted, I dumped the coolant and changed the plugs as part of a service and it seemed to fix it up,
A new Thermostat wouldn't hurt but I would start with the easy stuff before spending money where it's not needed to be spent.

A mate also had a similiar problem with his kwak, he had less than 1M ohm on the plug that was related to the cylinder that was glowing the front pipe.

This, sounds suspect to me. But it aint like I do this shit for a living, so I might have just never heard of it.

[DrunkenMistake]

This, sounds suspect to me. But it aint like I do this shit for a living, so I might have just never heard of it.

Just saying what happened,
May not have been the actual cause but it seemed to do the trick.

[Drew]

Just saying what happened,
May not have been the actual cause but it seemed to do the trick.Plug heat certainly changes temperatures on a two stroke. I guess it could have a similar effect on a four banger.

Wouldn't have thought so at idle or just above though.

[ducatilover]

Plug heat certainly changes temperatures on a two stroke. I guess it could have a similar effect on a four banger.

Wouldn't have thought so at idle or just above though.

If the gap was tight enough it'd get hot, but the plug would shit itself long before the header glows red wouldn't it?
Maybe.

[Confrontation]

283928
Would start with that, my old Hyo 650 done something similar, the front pipe did not glow red however but it was getting silly hot,
Front plug was rooted, I dumped the coolant and changed the plugs as part of a service and it seemed to fix it up,
A new Thermostat wouldn't hurt but I would start with the easy stuff before spending money where it's not needed to be spent.

A mate also had a similiar problem with his kwak, he had less than 1M ohm on the plug that was related to the cylinder that was glowing the front pipe.


I just put two brand new plugs on it previous to this happening

[TimeOut]

I just put two brand new plugs on it previous to this happening

Could still be a faulty NEW plug

[Murray]

Argh! do not listen to Akzle. bloody Waikatoians don't know one end of a motobic to annudder.

And wheres your Hometown????

[caseye]

Ah SHUDUPPAYERFACE!
1 bleed'n circlip away form being mobile again, next week now. Trumpy going good mate?

[Tarded]

Always recheck your own work as a start. then check the basics. The flangedoodle actuator valve rarely fails.

I was a mechanic for too long and manufacturers usually build reliable stuff despite the foil hat wearers whinging.

And never run a motor with no thermostat, poor advice.

it can even run too hot due to this, there is some research for you.

Even in the race cars i worked on we ran a thermostat,At the least if it dies and you are stuck cut the centre out to allow some restriction of flow with the outer ring/flange.