250-500cc WR thermostat bypass

The OEM hoses from the pre-thermostat models is pretty cheap. Toytech might have them in stock.

check the impeller, they come loose.

I used 3/4" coolant hose for the top 2 hoses and a 1/2" brass plug for the little return hose. Makes it easy to put the thermostat system back on if I feel the need to.

Doesn't seem to be the impeller, I have a good amount of flow in the top of the rad.

I disassembled my stock thermostat:



Pretty simple. I don't know how the damn thing can possibly not work, there's no much to go wrong in there. But oh well..

I was going to remove the guts, but then you need to plug the small hose. So, instead, I just reassembled with the spring on the other side:



This way, the small hose is blocked the same way it is stock with the t-stat open, and the spring holds everything in the open state.

Just carefully crimp everything back together, mine doesn't seem to leak. Time will tell if it stays sealed!

I wouldn't use that thermostat. We take them out of every bike we get, even the brand new bikes. Use my coolant and you won't get any of that corrosion, nor will you ever over boil.

The thermostat is completely disabled in this configuration, it just uses the stock hose connection so you don't need to worry about souring other parts.

It looks like corrosion in the pics, but there wasn't really any in there, just some "goop."

Is there a reason not to buy the OEM pre-thermo hoses it looks like a much better cooling flow. Less than $40 cost

Flow should be about the same. There is no reason, it's definitely the cleanest way to accomplish this. I'm just cheap, and I didn't want to wait for parts.

Will these work on a 2013 WR 250? Has anyone tried these? Would like to get some feedback before I purchase.

Sorry for the hijack.

http://www.ebay.com/itm/GPLUS-Silic...Parts_Accessories&hash=item3a82c2e983&vxp=mtr

I don't have that brand, but I wouldn't hesitate to buy them. May get some for spares. And yes, they will work on your 2013 to eliminate your thermostat.

Does anyone know if these will work on a 2013 TXC310R?

Your 310 is a four stroke, totally different bike.

Good call. I'm still waiting for one of the hoses 5 weeks now

hi guys first post here, i have the wr 2013 and the thermostat blew out the side due to the thin walled plastic. i want to buy a full radiator hose kit that will eliminate the 3 way junction for the thermostat you guys said this link is the one to get but i cannot make out if it will do the job for the 2013 does any one have some instructions for putting it on?

http://www.ebay.com/itm/GPLUS-Silic...Parts_Accessories&hash=item3a82c2e983&vxp=mtr

thanks for the help guys

thanks dirtdame, there is a dealer in nsw so i can get the same kit from them. so the two long hoses go from top of radiator to the head inlets and the "Y" section goes from bottom of radiator to inpeller and then the short section goes from inpeller to exhaust? just want to make sure as a new thermostat is like $130 locally and a full new hose kit is $70.

Yeah, that's the routing callum.

What I'm currently running is the '09 lower hose. 5/8" heater hose for the short piece. And the stock y from the head coupled with a 1" elbow to the stock upper part of the hose (removed the thermostat) I did have 2 straight hoses I was running from the head but the turns kinked a bit.

ok thankyou very much for that info. msmith345, ill have to give it a shot and see how she holds up. been a weapon of a bike so far but not this weekend hopefully next tho.