is -30F waether good for liquid cooled 2 strokes?

[TRI-Zbrian]

my tri z isnt together just yet but i was wondering if it can hurt it at all by running it in wether like what us northerners are getting right now. amagine what the wind chill would be at 60mph if it is already -30F

[davham]

Would you really ride if it was -30f?
I would be more worried about myself at that temp.

[TimSr]

Wind chill is "felt temperature" and not relevant to machinery. If its really minus 35 degrees, it probably wont start. If its 15 degrees, and the wind is blowing and that makes you arrive at your minus 35 degree temperature, the bike will run fine if you can keep from puking plugs during warmup, and it will last a longer than the rider.

[TRI-Zbrian]

no i dont plan on riding it i hate to even go out side in this weather lol i would freez :twisted: to death in this trailprotrailprotrailprotrailpro.

[ChrisD]

Ooohhhh Sweeeeeet!!!! Keep cold baby.......our lake skinned over 2 days ago, so if it stays as cold as they expect, we'll be out racing next weekend. It may be a little sketchy, but I just won't stay in one spot too long.

I agree...I wear 2 sets of long johns then a t-shirt, then a turtleneck, then a sweatshirt, then a down jacket, and snowboard gloves when it's this cold out.

As far as your bike is concerned, you will want to up the size of your main jet a couple sizes otherwise you'll cook a piston. I run Keihin 39PWK's and run 200 main jets in my bikes. I have gone to a 205 when it's as cold as you're saying. I don't know what the equivalent is for Mikunis.

[Lots_Of_Nothing]

her chris? really i should up the main jet that much? heres the mods to the bike... 85 R, fmf pipe and silencer, boyesen carbon fiber reeds, ported and polished, uni air filter, .40 wiseco.... right now i got a 165 main in it, and its running great, i let it idle for awhile and warm all up before i take it out

[ChrisD]

It depends on your carb. I assume that you're running a stock carb. I would still up my jet to a 170 or 175 in the cold weather. It also depends on your riding. If you ride hard tearing up and down snow covered roads, like I think you do (I do too), then a little preventive work will go a long way.

On my 85R for example, I run a .120 over piston, a 39mm carb, high compression motor (250 lbs), Boyessen reeds, PT hi Rev pipe, etc. It drinks fuel. Even in the summer I end up running a 190 main jet. So for comparison sake, you will want to go up 1-2 jet sizes. My bike isn't good on fuel, but the arm jerking power is there when I want it.

Be aware of your motor. You can check plug color, feel the motor to see if you're running hot, etc. I just know when my bike is running too crisp, it's time to change jets. Your motor shouldn't bog, but it shouldn't run ultra crisp and clean either. Whatever method you use, a $5 jet will save you time and $130 to fix your top end. i'm not trying to lecture people, but I thought I had it set up perfect a few years ago and melted a piston because I didn't change my jet.

[Lots_Of_Nothing]

Hey, i just got in from a ride, took it outback and ripped up the trails... and yes, i do ride like that, LOL just having fun ripping everything up, tearing it all, LOL, i pulled the plug when i was done, and its a little black, but also, i am mixing my gas a little rich for the break in.. it doesnt bog or anything, revs nicely, so this is probly the right jet for warm weather, i got some more jets laying around here, (170 and 175 and a few others), i'll throw in the 175 and see how she does,.. thanks for the advice, really dont feel like blowing a "brand new" engine.

bah.. my shin hurts like hell, that trailprotrailprotrailprotrailprotrailprotrailprotrailpro kicked back a good one this morning, LOL

[TeCaTe_MaN]

cold????? blah!!!, its about -20 outside right now, NOT COUNTING WINDCHILL cuz that is just gay crap.... and you think that stops me from riding? no sir, pull on the long jongs, throw on some sweat pants, sweatshirt, then jeans, then a coat, 5 layers of wool socks, 2 paris of thin gloves, then a pair of army issue shooter gloves, throw on the helmet and a scarf, your all set. still pretty damn cold when your opening up an 85 R down the middle of the road, but the fun makes up for it, i'll be out riding again later on today.

guess who's gonna get frostbite :-P lol

[HemiChallenger71]

The cold is killer on my bike, took like 10 kicks to start it, and I had to get it off the synthetic oil. Once I got my mineral oil through here it ran 10X better and I had to mess with the idle a bit. I had to keep the choke on for about 5 minutes as well. I'm running a 145 main jet I believe with a stock pipe K&N filter and .040 0verbore, stock compression. I'll be upping the main size I believe... In the summer with my 152 main I foul out plugs. Most likely not during the winter.

[250rAL]

I run a 172 in the winter, which was a little rich last summer, so I'm pretty close to ideal now. Might try a 175 to see how it works...