Cr500 Thermostat Options?
- Thread starter Pro-RmkBigsky
- Start date
I think this is why I am running like crap, no changes other than went to the TSS intake pod, and it isn't giving me enough air. Haven't tested enough to prove it though.
My riding partner who also has a KX500 ran an intake similar to the Timbersled early last season. We found that it would accumulate too much snow around it in the deep and would choke the motor. My intake didn't seem to have that issue so we made another one. Its a longer intake that draws air from further back and higher up, out of the way of the massive amount of snow that gets packed in near the motor.
My riding partner who also has a KX500 ran an intake similar to the Timbersled early last season. We found that it would accumulate too much snow around it in the deep and would choke the motor. My intake didn't seem to have that issue so we made another one. Its a longer intake that draws air from further back and higher up, out of the way of the massive amount of snow that gets packed in near the motor.
Interesting, didn't have any issues on the 500 with running extra rich, or seeming like it is cutting off flow?
You mean, did I see those issues with this intake? Nope, its 2.5" intake tubing and tons of surface area for the intake screen. Flows a heck of a lot more than the stock air box, especially when running a stock foam filter.
If you think the Timbersled intake is causing running issues because it doesn't flow enough by itself, that's probably not what's going on. As long as it doesn't have a bunch of snow packed onto the pre-filter, it should flow plenty for the 500. If you're saying that it ran better without it, maybe its causing some sort of turbulence near the venturis or something.
If you think the Timbersled intake is causing running issues because it doesn't flow enough by itself, that's probably not what's going on. As long as it doesn't have a bunch of snow packed onto the pre-filter, it should flow plenty for the 500. If you're saying that it ran better without it, maybe its causing some sort of turbulence near the venturis or something.
The only change made was the intake and it started running extremely rich. I'm going to do some testing tonight, pull the sock off. Maybe something else is going on, see if I can figure it out.
I was expecting more flow out of a prefilter set up too.. So it is odd to me.
The other thing you can do is put a bigger predicted over the one it has... That way it wrinkles a bit and moves a little to shake the snow off... Or it can be removed and shook out and place back on... I found this avoids the ice buildup ...
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Thermostat
Just in the middle of my snow bike build of a Service Honda CR500AF. So I haven't had any time in the seat yet, but wanted to throw some ideas out here. If your stock cooling system works at the dunes in the heat of the summer, then if set up right, wouldn't it work in much cooler temps in the winter? The CR500 has two 15mm coolant lines right off the head. If you only opt for the one Thermostat bypass with a carb heater in coolant line 1 while leaving coolant line 2 open to the other radiator, most likely will never reach your coolant temp to open the T-stat, resulting in not reaching your desired 135F, and the carb heater not doing its job. And by manually valving the 2nd line, you cut the cooling capacity by half. Yes, I can see this upping your temps but as soon as you get back onto the trail or out of the powder your having to stop and open her up again.
So I will do this for a trial and error, because I have yet to read about someone with the same set up I plan to do. Not saying it will work, but to me it is sound.
Go the expensive route without having to add an extra cooler to see if I have any issues. If I don't have any issues hopefully it will help someone who might be on the fence of actually spending the money in fear that it is completely overboard.
Throw down for a Lectron high velocity Carb (no jetting issues), two Avid 135F T-stats (so that all coolant is metered between the two radiators),with carb heater, neoprene carb jacket(keep the heat in), TTO temp gauge, and an intake from Powersportstech that is large enough intake for the 500. I will also run a pipe guard. While running all stock cooling features for a CR500.
I will post as soon as I can actually get the bike out of the garage and into the powder. Open to any ideas anybody might have. BRAAAAAAP!
Just in the middle of my snow bike build of a Service Honda CR500AF. So I haven't had any time in the seat yet, but wanted to throw some ideas out here. If your stock cooling system works at the dunes in the heat of the summer, then if set up right, wouldn't it work in much cooler temps in the winter? The CR500 has two 15mm coolant lines right off the head. If you only opt for the one Thermostat bypass with a carb heater in coolant line 1 while leaving coolant line 2 open to the other radiator, most likely will never reach your coolant temp to open the T-stat, resulting in not reaching your desired 135F, and the carb heater not doing its job. And by manually valving the 2nd line, you cut the cooling capacity by half. Yes, I can see this upping your temps but as soon as you get back onto the trail or out of the powder your having to stop and open her up again.
So I will do this for a trial and error, because I have yet to read about someone with the same set up I plan to do. Not saying it will work, but to me it is sound.
Go the expensive route without having to add an extra cooler to see if I have any issues. If I don't have any issues hopefully it will help someone who might be on the fence of actually spending the money in fear that it is completely overboard.
Throw down for a Lectron high velocity Carb (no jetting issues), two Avid 135F T-stats (so that all coolant is metered between the two radiators),with carb heater, neoprene carb jacket(keep the heat in), TTO temp gauge, and an intake from Powersportstech that is large enough intake for the 500. I will also run a pipe guard. While running all stock cooling features for a CR500.
I will post as soon as I can actually get the bike out of the garage and into the powder. Open to any ideas anybody might have. BRAAAAAAP!
on deep powder days not a chance in hell i could keep my cr5 temps up without a thermostat. and i have lots of shrouding
Sorry. Thought i mentioned it somewhere. I have the avid t-stat with the bypass going to my carb heater.
Here are pics of my cooler on a '16 kit:
B
Bigred1
New member
Thanks for the pictures they help a bunch, could you send a few pictures of where you ended up putting the t-stat and how you deleted the left radiator. Appreciate all your help, haven't been able to ride it much with overheating so bad. I'm running a 525 kit, porting and 40mm smart carb
thermostat stuck open? i just have an old ktm single in single out tstat from a 2stroke and in in deep cold fluff my temps never go below 120. back before i ran a stat my bike wouldnt run for **** when the temps dropped below 80
I actually deleted both radiators and I'm just running a cap assembly from some other arctic cat sled, I did a little write up here: http://www.snowest.com/forum/showthread.php?t=391181
Here are a couple more pics that might help:
Here's where my ktm thermostat is. I'm running the bypass straight to the carb heater and back into the return line from the tunnel cooler:
Here are a couple more pics that might help:
Here's where my ktm thermostat is. I'm running the bypass straight to the carb heater and back into the return line from the tunnel cooler:
Pretty sure I figured it out. It seems like there is plenty of flow through the prefilter. I took the needle out to adjust jetting, the clip was smashed down to the bottom most position or further, not sure how it happened. But problem there solved.
But then I still ended up running a bit rich in the deep stuff. If I stopped and cleaned the snow away from the vent lines it started working well again for a brief time. Doubt I have any icing on the inside of the carb, but changing the routing of my vent tubes plus having them enclosed with a carb heater would likely solve the problem.
Also my jetting seemed all over the place, seemed awfully lean on the roads and had to turn in my air screw and move the clip on the needle. Still seems rich on main jet, probably drop it one more step.
Ideally I want a new carb, just not quite in the budget yet since I'm thinking airstryker with pulse induction plus a dual thermostat set up with avid.
I need to come up with a temporary/permanent solution for the vent tubes getting packed with snow though. And then if I keep having issues with this PJ carb jetting, replace it. Right now I think it is lean on roads because I come off the throttle and it goes ding ding ding ding, then drops back to normal idle.
One other thing to check is to make sure your gas cap vent is not jamming up and reducing the fuel ... On mine it jammed up and I could not even get fuel to the carb... I end up going to a no toil vented cap... I doubt that is what it is but worth noting
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