Water cooling system

[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.

[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.

Hyosung GT650R (Carburetor)

[Drew]

Hyosung GT650R (Carburetor)

Sweet. Advice still stands.

[nodrog:Me]

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??

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.