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Workshop => Engine and Bottom End => Topic started by: Aceman on May 16, 2016, 07:36:22 PM
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I just picked up another R with a CT350PV engine and a PWR radiator. I took it down to Winchester Bay the last few days and it ran well. Temps were in the 50-65ish range. When riding the tight twisty trails in 2nd gear I noticed my ESR temp gauge would hit 240 degrees! When riding higher speeds in the out in the open it would hover around 180-190 usually. Is this standard for a 350?
What surprises me is my 310 has an AFCO dual pass radiator and most of the time it hovers around 130-150 degrees but I can hit 180 under hard duning. Both quads have air scoops and neither are running an adjustable timing plate.
I'm considering yanking the pwr out and trying to find another AFCO, but it seems a lot of you guys on here aren't running anything more than a stock rad or pwr, so what's the deal with mine running so hot?
Jetting:
40.5 pwk
55 pilot, 1.5 turns out on air screw
dgh needle, clip middle
195 main
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I just picked up another R with a CT350PV engine and a PWR radiator. I took it down to Winchester Bay the last few days and it ran well. Temps were in the 50-65ish range. When riding the tight twisty trails in 2nd gear I noticed my ESR temp gauge would hit 240 degrees! When riding higher speeds in the out in the open it would hover around 180-190 usually. Is this standard for a 350?
What surprises me is my 310 has an AFCO dual pass radiator and most of the time it hovers around 130-150 degrees but I can hit 180 under hard duning. Both quads have air scoops and neither are running an adjustable timing plate.
I'm considering yanking the pwr out and trying to find another AFCO, but it seems a lot of you guys on here aren't running anything more than a stock rad or pwr, so what's the deal with mine running so hot?
Jetting:
40.5 pwk
55 pilot, 1.5 turns out on air screw
dgh needle, clip middle
195 main
Have you tried boiling the gauge to verify it's reading correctly?
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No, I just got back from the trip. I'll have to try something though. One of the other guys I was riding with mentioned aiming a temp gun at it, but I think I bring enough crap camping, I didn't think I'd need to bring a temp gun too!!
Don't you have a Puma Skeans, what does yours run at? What kind of radiator?
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U might be a bit lean on ur needle. Mine will get warmer when air flow is not as good but also climbing thru the trees. 350 with stock rad. When air flow is good it's 180 or less. The needle makes a big difference.
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No, I just got back from the trip. I'll have to try something though. One of the other guys I was riding with mentioned aiming a temp gun at it, but I think I bring enough crap camping, I didn't think I'd need to bring a temp gun too!!
Don't you have a Puma Skeans, what does yours run at? What kind of radiator?
Yeah I do run a puma on a stock radiator it doesn't get hot I don't run a gauge but I've never boiled the radiator with the puma or sphinx.
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Mine runs at 190-210*, never had it boil over on me.
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In deep woods and twisty trails where you are going slow and there is almost no air passing through the radiator, high temps are very possible. I have found that the PWR is really not much better than stock when you still have very little air flow. Between the 2, the Afco is probably a better cooler. As others have said, make sure you are not running lean on your carb. Aside from trying the Afco instead, your only other helpful options would be to run a coolant booster, such as Amsoil dominator coolant boost.
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what coolant do you use?
what is the condition of your impeller?
is you octane rating correct?
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what coolant do you use?
what is the condition of your impeller?
is you octane rating correct?
Also good questions. We are ASSUMING that everything is correct with your engine. This is not meant to upset you or insult you. Sometimes, it's the little things that are missed. John's just making sure the questions are asked.
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what coolant do you use?
what is the condition of your impeller?
is you octane rating correct?
I'm not sure what's in it for coolant, other than it looks blue. I run Engine Ice in the 310, I may have flush the coolant in this one and switch to Engine Ice as well just so I know what's in there. I also can't speak to the condition of the impeller either, other than when I picked this quad up it had a receipt for a recent engine build. I was also running straight VP110, so it should be good there.
Also good questions. We are ASSUMING that everything is correct with your engine. This is not meant to upset you or insult you. Sometimes, it's the little things that are missed. John's just making sure the questions are asked.
No worries, you guys have given me a bunch of ideas on where to start looking at least. It seems the general consensus is leaning towards this thing is in fact running hotter than it should. Now that I know that, I'll have to spend some time checking out each of the different ideas mentioned in this thread. Thanks to everyone for the help so far!
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Another good question what pipe are you running I don't see that listed.
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Shrouds? Are they sealed to the side of the radiator so all the air gets pushed through the radiator.
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Shrouds? Are they sealed to the side of the radiator so all the air gets pushed through the radiator.
^^^This.
I know you said you run shrouds on both of your bikes, but some have less of an air gap between the rad and shroud. I stuffed coarse foam in between my rad and shroud to make sure the max amount of air flows through the radiator. Not around it
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^^^This.
I know you said you run shrouds on both of your bikes, but some have less of an air gap between the rad and shroud. I stuffed coarse foam in between my rad and shroud to make sure the max amount of air flows through the radiator. Not around it
Mine was so tight they had a little silicone to seal them tight.
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i would be concerned with anything much over 200 for more than a couple minutes
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Shrouds? Are they sealed to the side of the radiator so all the air gets pushed through the radiator.
Doubtful. There were only a rare few styles that actually designed theirs in that way. They should be though.
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Doubtful. There were only a rare few styles that actually designed theirs in that way. They should be though.
We still need to figure out who made that set I have.
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Another good question what pipe are you running I don't see that listed.
^^ Probably the best question. Pipe?
Mine runs 200* on the hot humid days. Chinese made radiator.
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ACEMAN: Try lowering the clip 1 position (Raising the needle) if it lowers the temps and doesn't bog....you're good!
I have a Pro-X350PV that overheats...tried everything....couldn't get the temps down.....tore into the motor and found the coolant passages around the exhaust area are too resticted with casting flash.....I need to grind them open to get more flow.
I did this to my ESR330R that was running 200-210 with a 185main....now I can run a 178main and the temps don't go over 185!!!
If you're still running hot....pull your cylinder head and check the coolant passages....you might have the same issue as me.
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Another good question what pipe are you running I don't see that listed.
It has an FMF Fatty with a CT Racing Silencer.
Shrouds? Are they sealed to the side of the radiator so all the air gets pushed through the radiator.
The quad is in the toyhauler right now so I can't look, but I believe there was about a 1/4" between the scoops and radiator.
ACEMAN: Try lowering the clip 1 position (Raising the needle) if it lowers the temps and doesn't bog....you're good!
I have a Pro-X350PV that overheats...tried everything....couldn't get the temps down.....tore into the motor and found the coolant passages around the exhaust area are too resticted with casting flash.....I need to grind them open to get more flow.
I did this to my ESR330R that was running 200-210 with a 185main....now I can run a 178main and the temps don't go over 185!!!
If you're still running hot....pull your cylinder head and check the coolant passages....you might have the same issue as me.
More good ideas to check, thank you all!
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In the woods mines 160ish, when I take it to the dunes I really have to watch it as I've boiled it out several times.
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My 330 with Afco never broke 175-180* at the dunes on a 172-175 main
Same bike with a 363 runs about same temp with main jet set at 190-200
Sent from my iPhone using Tapatalk
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150 is if im hauling ass all the time. i can get up in the low 200's if im stuck going slow for an extended amount of time
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I just picked up another R with a CT350PV engine and a PWR radiator. I took it down to Winchester Bay the last few days and it ran well. Temps were in the 50-65ish range. When riding the tight twisty trails in 2nd gear I noticed my ESR temp gauge would hit 240 degrees! When riding higher speeds in the out in the open it would hover around 180-190 usually. Is this standard for a 350?
What surprises me is my 310 has an AFCO dual pass radiator and most of the time it hovers around 130-150 degrees but I can hit 180 under hard duning. Both quads have air scoops and neither are running an adjustable timing plate.
I'm considering yanking the pwr out and trying to find another AFCO, but it seems a lot of you guys on here aren't running anything more than a stock rad or pwr, so what's the deal with mine running so hot?
Jetting:
40.5 pwk
55 pilot, 1.5 turns out on air screw
dgh needle, clip middle
195 main
I know it's been a year, but I wanted to follow up. Took the 350R down to Winchester Bay for the last few days and overheated it. Again. Tore the head off to find the inner orange o-ring was missing in several spots as well as the dome o-ring had quit sealing. Called CT on Thursday at 2 pm and told them to next day air the top end gasket set and another dome, had it delivered to the campground Friday!!!!
Installed all new o-rings and the dome and ran it the rest of the weekend. Temps were 165-190ish the rest of the weekend. Problem solved!!
Big thanks to CT for coming through for me and saving my vacation!!!
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Glad to hear you got it figured out. Yep, those orings will get ya every time. If they slip out of the groove the slightest amount when you are installing the head, it will cause combustion pressure to push into the cooling system or cause an external coolant leak. After you got that fixed, the temperatures sounded pretty good. Ride on!