LJ 452
TY 4 Stroke God
TBay Sledhead said:
I think I'll just clean the ones that are in the sled, if it came down to that. I'd have no problem pulling them at -30*, but there's no way I gonna carry what $30+ dollars in plugs around with me for the 1 in 10,000 chance I foul one out trailside. I've never fouled or had a guy I ride with foul a two-stroke plug before. Sure I've had them get loaded up a bit from over idling (2S) but they clear up on there own.
As long as you follow the proper startup process there's nothing to worry about. If you follow the process and still foul a plug there's something else wrong with your sled that's caused it.
TBay Sledhead
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The problem when starting at -30 is that the plugs don't actually foul but them get soaked in fuel and then won't fire. The only solution then that I know of is to remove the plugs and either dry them or replace them. But if you don't want to spend the money that is your prerogative.
the one time i did soak the plugs, i just pulled the fuel pump relay and cranked it over with holding the throttle about half open. The sled fired for a couple of seconds and then stalled. I plugged the relay back in and it started up. Guess it's enough to dry the plugs and get some heat in the combustion chambers. This was around 0 F not -30!
Apex2006
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Agreed! Never had a problem, and I do change the plugs annually even though it is not required. My analism.....guardrail said:
LJ 452
TY 4 Stroke God
It's not the cost of the plugs that I'm against. Believe me I've put way more into this thing than the cost of a set of plugs. It's the fact of carrying around a set. Where are you going to put them? If you leave them loose they're going to get damaged, now you've just created a new problem. Just saying it's not worth worrying about, WORST case scenario, dry the current ones out and put them back in. Started my sled in -18, -22, -28 several times, yeah it cranks a bit longer maybe one or two full revs but other than that no issues.
It reminds me of a trip were one guy (800 Ptek) was borrowing another guys Viper to go get parts for his Doo (imagine that, it was broke). First start of the morning, Doo guy starts the Viper and keeps pulsing the throttle, about 30 seconds in to it, myself and the Viper owner ask Doo guy, "what the heck are you doing?" He says, "keeping it running" we looked at each other and laughed, said, "It's a Yamaha just turn the key and walk away". Apparently that was the only way to keep his Doo running on a cold start. I'd never seen so much smoke come out of that Viper!
Point is, forget everything from the past sleds and just let the F.I. do it's thing. Don't Touch the Flipper.
It reminds me of a trip were one guy (800 Ptek) was borrowing another guys Viper to go get parts for his Doo (imagine that, it was broke). First start of the morning, Doo guy starts the Viper and keeps pulsing the throttle, about 30 seconds in to it, myself and the Viper owner ask Doo guy, "what the heck are you doing?" He says, "keeping it running" we looked at each other and laughed, said, "It's a Yamaha just turn the key and walk away". Apparently that was the only way to keep his Doo running on a cold start. I'd never seen so much smoke come out of that Viper!
Point is, forget everything from the past sleds and just let the F.I. do it's thing. Don't Touch the Flipper.
langow
Expert
TBay Sledhead said:
I realized after I posted that you were all probably talking celcius and I'm thinking farenheit. A little better, but still cold.
mr.pitstop
Expert
I've never fouled a set in a 4 stroke. I've started it a -35F before no problem. I just let the sled warm up before I take off or shut it off. I have started it and then shut it right off by mistake before and started it back up, it sputtered a little but cleaned right up and ran fine. Its nothing that will happen unless there is something causing it (i.e. hitting the throttle before its warmed up, shutting it off before its warm, or a problem with the sled)
