My 250SX doesn't like the cold.... Help me

[200X Man]

Need some advice on my 86 250sx. I just can't get it started in the cold, and the choke has never worked properly. If I used the choke, I could never get it started. I've taken the carb apart and everything looks fine. Any ideas??

[bigb9582]

clean the carb real good. and lube up the choke cable, it could be sticking.
before i cleaned mine real good, i had to use starting fluid on real cold days.

[200X Man]

Yeah, tried that but still have the problem. I thought I read someone say something about a cold start kit but I've never seen one. Anyone have any info on this??

[Tri-ZNate]

yeah the cold start kits were put in the late '85 SX and on. It shouldn't be that hard to start though. When I had the stock carb it would take 10-15 seconds of starter winding to get it to start and stay running. Are you valves adjusted to specs? That would cause hard starting.

[bigredhead]

Just got out of the garage with the same problem as well... argh...

When she's warm.. my SX fires right up.. no problems.. but when cold.. geeez..

[Cody]

Take a hair dryer to it. LOL. Yea, maby your jetting is off?

[Tri-ZNate]

know what? I wonder if that cold starting kit isnt just a size bigger jet. When i got the 350x carb on with the 135 main it start in 2 kicks no matter what. Just food for thought.

[mad_max]

Do a seach on "cold start kit" I posted all the info about it some time ago.

FYI there is actually a start jet (orifice). It is pressed in (not screwed in like a main). Among other things in the kit you get a new larger start jet. But you need to have a free moving choke before you do anything.

[Tri-ZNate]

http://3wheelerworldforums.com/showthread.php?t=28620

[BLAZERONE22]

I think you guys should try to track down a carb off a Fourtrax 300, they have a primer pump on the side of the carb, I noticed when cold I can never get mine fired up unless I pump on it a couple times. I think that it would be a good upgrade and it should work on the SX fine.

[ClayW]

Both of my SXs and my ES never had a problem. THe SX's were late 85 & a 87. The ES was a 87. Now all three were a little cold natured at first. Then I ran some Amsoil injector/carb cleaner in the tank. Withing 5 min of ideling they all started ideling real fast. I guess it cleaned the cobb webbs loose. I backed the idle down on al three and never had a problem again. I could fire my 87 BR off when it was 20 Degrees out with no problem. I know this doesnt help, but you may try some strong cleaner added to the fuel.


Clay

[bigredhead]

I gotta do something cuz maaaaaaan.. even with a brand new battery.. she's a pig in the cold temps..

In summer however.. Blip Blip.. vroom... no problem what so ever.. and i don't want to screw with my summer settings too much.

If i heat the garage, she's no problem once started.. i can turn if off and let it sit.. she'll fire right up .. but god i hate it when i won't fire !

[darrel632]

There is a block heater kit (CDN) for big reds maybe its adaptable for the SX?

[New2ATC]

My old SX didnt have a choke, and the elec start didnt work, but in the winter it would start in about 15 kicks or so.

[Bigred200]

Man you guys are killing me I'm getting my sx next week and you guys are making me second guess myself....lol

[bigredhead]

About the block heater .. lol.. funny you mention.. i have one actually !! NOS never installed. i'm keeping it for when she officially becomes a garage queen .

But don't get me wrong tho.. i would not trade my SX for any other trike out there. I just need to make it start when cold !! lol...

I think i may have contributed to my hard start actually.. i just had my selenoid stick on me and had to let it sit a few weeks while i waited for my new battery.. so i finally got the battery and gave it a few blips to make sure things were ok. and it fired up ( while i had the garage heated for a few hours !!! ) but i killed it not to fumegate myself .. and did it again the next night.. yesterday was the 3rd day of me doing this so i figure i have a nice black plug right now !!! .. just can't locate my plug socket.. argh..

[Dirtcrasher]

If you can't buy the cold start kit, get an EBAY 30$ 350X carb and put the SX jets in it.