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2 stroke carb heat southern interior B.C.

U

unovaquero

Free Member
Looking for some input regarding carb issues on a 300 two stroke. Presently looking at the Avid product, is a thermostat sufficient or is the carb heat portion needed? Neoprene jacket looks quite similar to a lot of the beer cozy's I have lying around with a few modifications.... Pipe will be wrapped as well, and thinking about using the SXS snowshed (skid plate/engine shield). Live and will be riding predominantly in the Southern Interior of British Columbia.
Thanks so much!
 
unovaquero said:
Looking for some input regarding carb issues on a 300 two stroke. Presently looking at the Avid product, is a thermostat sufficient or is the carb heat portion needed? Neoprene jacket looks quite similar to a lot of the beer cozy's I have lying around with a few modifications.... Pipe will be wrapped as well, and thinking about using the SXS snowshed (skid plate/engine shield). Live and will be riding predominantly in the Southern Interior of British Columbia.
Thanks so much!
Click to expand...

I've done well on a kx500 in washington with no heat or jacket.
 
We live in southeastern bc. All the carbureted bikes in our group freeze up more often than not, without heat.
2-kx 500's and a 525exc. Carb heat is necessarry out here,anyway. I dont think your 300 would be any different. Good luck with your bike. The 300 should be perfect.
 
I ride anywhere from the coast up to revy in BC. Have the avid carb heater. I would say it's necessary, had my carb freeze up without it.

I have the older avid one that's a big square and it takes up too much room I find, some newer ones that are out, are smaller and round. I would look for one of those, or I'll sell mine haha. I'm in the Okanagan
 
You will need carb heat, my 300 would only need engine shielding on the deepest powder days, generally runs too hot rather than to cold.
 
needpowder said:
Not sure why you would even try when a carb heater running coolant thru it works perfecly with no electric draw.
Click to expand...








Because the grip heaters are about 20 bucks, and the Avid carb heater kits are 300.




Plus I don't run grip heaters, so I got the juice to run them there, if they'd work.
 
Heated carborator

I ran a 2015 KTM 300 XC on a Timbersled ST last year. Carb heat is required. KTM makes an electric carb heater that will thread into the stock carb after you drill a hole in the flat area designed by KTM. You then wire it into the AC circuit so that it will only operate when the engine is running.

I also ran gas line anti freeze mixed at 100-1 and boosted my oil premix from 50-1 to 32-1 this worked flawlessly for the entire season.
 
Set up a 300 before the Avid kits were available, used a gripheater on the intake boot as close to the bell of the carburetor as practical. About 15 rides ran decent. Next added the KTM screw in heater, left the gripheater in place used it about half the time when the KTM heater wasn't enough. Bike liked the more consistent heat ran real good this way. Probably 30 rides on that set up.
 
Ran my Sherco 300 2t in Revy all last year with a shroud that covered the pipe and plastic side covers around the engine with no extra heat to the carb and never had any freezing issues. Make sure to cover the rear of the engine so snow isn't coming off the track and packing in around the carb.
 
capulin overdrive said:
Because the grip heaters are about 20 bucks, and the Avid carb heater kits are 300.




Plus I don't run grip heaters, so I got the juice to run them there, if they'd work.
Click to expand...

Gotcha. I do remember reading about someone trying it and it not working great if i recall. I would think you would definitely need a good cover around it. If you could keep all the snow off your carb you might have a winner. What gets me is how many truly epic days do we actually have each season--the kind of days when you really want your bike to run well? Just not sure t's worth taking a chance on those days.
 
Tree rider said:
I ran a 2015 KTM 300 XC on a Timbersled ST last year. Carb heat is required. KTM makes an electric carb heater that will thread into the stock carb after you drill a hole in the flat area designed by KTM. You then wire it into the AC circuit so that it will only operate when the engine is running.

I also ran gas line anti freeze mixed at 100-1 and boosted my oil premix from 50-1 to 32-1 this worked flawlessly for the entire season.
Click to expand...

I have a brand new KTM Electric carb heater that I will sell you for $50.00 Canadian. I also have a Penco Power Products carb jacket that I will sell you for $50.00 Canadian. I am in BC and if interested can send Canada Post at no extra charge.

This stiff is sold now.
 
Last edited:
cheap idea

before off the shelf heaters were available, I wrapped two loops of copper tube around the bell of my yz250 carb. Eliminated my carb icing, still on and still working, I used the little skidoo carb heat line valves so I can open or shut it...........I don''t ride it much in the deep any more, but most of my carb icing wasn't epic powder days, it was 4" of the wrong snow going fast.
 
If you nay sayers would see the pics that were shown on this site few years ago you would understand the importance of proper setup. 2 strokes are very touchy to setup. Might run without it for awhile but not making power it should. The carb will freeze up the air bleed holes from air velocity.
It's beating a dead horse for 5 years already.
Stable temps from proper shrouds and carb heaters
Air intake. Simple pod filter setups
If you can't ride out your back door or just want a proper runner do the basic absolutely needed mods.
 
capulin overdrive said:
Because the grip heaters are about 20 bucks, and the Avid carb heater kits are 300.




Plus I don't run grip heaters, so I got the juice to run them there, if they'd work.
Click to expand...

But home made carb heater with some parts from Napa and the hardware store can be made easily for probably $25 for a couple tees, valve and some hose.
 
AZ800 said:
But home made carb heater with some parts from Napa and the hardware store can be made easily for probably $25 for a couple tees, valve and some hose.
Click to expand...
Is there a write up on this anywhere? I just bought my first kit and am new to the snow bike world.
 
Is having a valve in the heater circuit necessary? Machined up my own carb heater with .25" holes drilled through length wise on three sides and ran it all last winter w/out a valve. Or would using the valve to keep it just above an icing level so the motor gets the coolest air that much of a benefit?
 
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