CCS / ASRA Racing Forum

All the other stuff => Wrenching => Topic started by: Woofentino Pugrossi on April 11, 2004, 03:56:13 PM

Title: Thermostat question.
Post by: Woofentino Pugrossi on April 11, 2004, 03:56:13 PM
Has anyone run their bike without the thermostat in it? I was wondering if that would bother it and help it stay a tick cooler.

Sorry I accidentally posted this in tricks and tips by accident. Couldnt delete it.
Title: Re: Thermostat question.
Post by: Zac on April 12, 2004, 11:19:06 AM
No thermostat can cause a bike to run too cold.  Running a bike that's too cold under race load can be just as bad as overheating, at worst a cold sezieure.  The simple solution is to watch your engine temp and add duct tape on the radiator to get the temp up where you want it.

The other issue can be with the coolant flow rate.  Sometimes on an engine the thermostat will act as the orifice that controls the coolant flow rate.  Too high of a coolant flow rate and the radiator becomes less efficent.  I know this was a problem for guys racing old Triumph cars, they would run hotter after they removed the thermostat, so the fix was to run a restrictor plate in the thermostat housing.

Title: Re: Thermostat question.
Post by: Super Dave on April 15, 2004, 08:46:05 PM
On current production bikes, few run thermostats for racing.

If it's cool, like Daytona was, you might find that the temp doesn't come up as high as you would like.

So, like you do on a TZ250, strips of tape to reduce the flow of air through the radiator brings up the temp.

Thermostats can lock closed causing big $$ damage.  Cold siezures on four strokes?  Nah.  Do have to be careful on two strokes.

Rob, I have not had thermostats in my bikes for years.
Title: Re: Thermostat question.
Post by: lbk on May 04, 2004, 05:09:22 PM
Or take the existing thermostat out, cut out the part that is spring loaded and put the other piece back in there. That way, the opening is the same size as it always was, restricting the flow a little bit of the coolant, but yet never have to worry about a thermostat opening or closing. It's basically always open.