330 esr pv overheating please help?

[trx250scar]

ok let me give some history.i spent so much on parts i didnt trust myself to assemble it as i am not a pro but have done rebuilds on my other trx250r so am not a complete idiot. i sent it off to another builder in rancho cucomondo cali. i know he is not the favorite here so please save the bashing and if you can limit the commets only to helpfull ones. 2001 cr250 ignition. i ordered a new esr 330 pv cylinder with pump gas dome and trx9 porting, esr cases that the deck hieght was set up for 4 mil stroker crank which i ordered new from ebay and sent to crankworks to have balanced and welded. cylinder was supposed to be also set up for 4 mil stroker. i ordered the esr parts directly from them and told tom when he was there to have eddie set it up for the 4 mil. i also ordered a brand new trx5 pipe with a type 2 silencer. also new esr 38mm air stryker. dgh needle 60 pilot 182 main 2nd clip from bottom. i ran wot plug chops and 185 bobbled a little like was rich so went 182 it had a nice tan color. now i have never been able to get it to idle. does anybody run a larger pilot? i have an oversize pwk radiator which i tried another oem known to work radiator so it is not clogged up. flow is good when checked with the radiator cap off.  in line temp gauge(ESR) on the top hose opposite of the pipe. this thing runs very strong however builds heat very quickly and continues to peg the temp gauge in just two minutes of riding after it has reached the warm up temp of 150. do i have a timing issue? poor cylinder casting? was the cylinder improperly set up? was the crank not a stroker? stroke not matching the ports? maybe wrong dome as i did not see it with my eyes before it was installed? i dont think it is lean as the plug at wot looked good and ran clean no popping and what not. i was thinking lean in the mid since wot was good so i even went back to a 185 and lifted the needle to top clip. still overheating. hoping maybe rsss396 will read this and chime in as he seems to be knowledgable about the timing tho all opinions are valuable. thanks in advance for the help.

[The Phantom]

Pump gas dome with stroker crank??  I was told by Tom not to use pump gas or pump gas dome with my 350pv +4 stroker.  He originally told me I could mix 50/50 but then called me back to tell me not to mix. told me to use 100% race gas.  Just a thought.

[udontknowme]

i dont have a solution for your issue but i know if your pegging the gauge then you have a serious problem somewhere. personally i wouldnt keep riding it until you get it sorted out.

[trx250scar]

well i dont continue riding it at high temps to prevent damage but do need to try different jets needle position etc

[trx250scar]

Pump gas dome with stroker crank??  I was told by Tom not to use pump gas or pump gas dome with my 350pv +4 stroker.  He originally told me I could mix 50/50 but then called me back to tell me not to mix. told me to use 100% race gas.  Just a thought.

What octane Did they recommend for your application.

[udontknowme]

i think you have more than a jetting problem.  is your timing set correct ?  a couple more things come to mind, recently i seen a issue with esr pipes holding alot of heat in the cylinder and the cylinder front water jacket not being up to par

[rsss396]

advanced timing will add some heat to the motors cooling system but I would say not enough to cause overheating issues.
are you sure you do not have a blown head gasket? only 2 min of riding after reaching 150 seam a little extreme, I would not expect that quickly even on a 90+ degree day, I forget how high do the ESR gages read? is it puking antifreeze out of the radiator?

[udontknowme]

esr gauge is 250*. ya timing doesnt seem like the issue plus it would probly run like crap if it was very far off.  if head gasket was blown it would either go to the outside which he would see or into the chamber but he claimed its was running strong so i dont think its going inside

[trx250scar]

It will start puking but I am unsure at what temp. ESR gauge reads 250 max. Running 100% distilled water now.Did start with antifreeze mix.

[udontknowme]

maybe they really screwed up your head dome ?  put a call into jerry hall tomorow and ask if the pipe stinger issue along with the water jacket could cause your problem.

[trx250scar]

Who is Jerry hall

[udontknowme]

halls precison machine i think in glendal AZ. pretty smart feller. forgot as much as carlos knows

[rsss396]

if you blow the inner oring it will over pressurize the cooling system and add heat but you normally start having a hard time starting it because it will want to leak back in the cylinder and water level will drop in the system from puking out and the cylinder burning some.
nothing can be wrong with the cylinders to put to much heat in the cooling system, porting not going to cause this either.
A too small of a stinger is not going to create issues unless you are holding wide open for longer periods of time.

sure seams like a water flow issue, even running pretty darn lean should not make it climb like crazy in such a short time. sorry dont have any more for you.

[udontknowme]

said he swaped rads and still the same thing ?  if the pump was broke the engine would be hot as a mutha but it wouldnt push water to the gauge so it would read alot lower i would think. ya im stumped good luck dude

[Tbone07]

I think you need to contact Eddie @ ESR and find out if you have one of the cylinders that needs the water jacket modified towards the front of the cylinder by the exhaust port.

Also, you sure the gauge is working correctly? Maybe find another alternative to measuring your temperature to rule this out. Thermometer in your rad with the cap off? Lol just a thought (although you did say it was puking out the overflow)

Don't worry about the exhaust. The stinger diameter wouldn't raise temps that high, that fast. No way.

Set your timing it is not advanced nor retarded. Just to rule that out.

Do a leak down test...

Is this an o-ring head? If it is, then pop the head off and inspect the o-rings. I put a little bit of white lithium grease on them to help seal.

It would run like crap if it wasn't setup correctly for the +4mm stroke.