SNOWMOBILING

[waterbug1999]

when you got your reeds, did they have a jet chart and what the fuel screws were supposed to be tuned to? watch your a/f because you can go piggly rich on the bottom and be lean as fuck on the big end. a jet can only be tuned so much when it comes down to reeds and a/f along with your clutching and rpm. your plugs can only tell you so much when you're not opening up the reeds.

I emailed boyesen and they recommended to got down one size and read plugs. I went out with fotoboy after I installed them and it ran fine and felt really strong the way it was.. But, it was cold (10*) so I left it as is.. Just this past weekend was warmer and it ran like shit up top and felt slower down low.. So, I just want to go leaner down low and up top some.

[lark-o]

Ive had good luck running with out needles and jets. Ive never burned it down

[waterbug1999]

well, I found this charting... Wouldn't it be safe to just throw in the 480 jets?

[sport the war]

I'd do as they suggested and go down a size.

[waterbug1999]

I'd do as they suggested and go down a size.

You think adding a pair of EGT sensors would help for tuning?

Like if its running too hot (too lean), then go up a jet size and visa versa? Is that how it works? Go by EGT's and not AF?

[1moretoy]

Jet it to the way YOUR sled runs best. What works for one, does not work for all. Yes the charts will get you in the ball park. I have never heard of people running the EXACT same set up and get the EXACT same results.

[sport the war]

Jet it to the way YOUR sled runs best. What works for one, does not work for all. Yes the charts will get you in the ball park. I have never heard of people running the EXACT same set up and get the EXACT same results.

true it depends on condition of motor, exhaust condition and other factors such as temp. of course you're going to be talking elevation also. but to get a good idea of where you're at indexing your jets is a good place to start and tune from there.

[Southern]

I really like my efi might not be the fastest, but I sure as hell dont have to dick around with jets.

Now to just dick around with the clutch to get it right

[lark-o]

You think adding a pair of EGT sensors would help for tuning?

Like if its running too hot (too lean), then go up a jet size and visa versa? Is that how it works? Go by EGT's and not AF?

although a useful tool, its not needed for a stock sled. go by plugs and what the piston looks like. the more you ride your sled the more youll notice how its running. keep it fat and work your way down in little increments.

[waterbug1999]

although a useful tool, its not needed for a stock sled. go by plugs and what the piston looks like. the more you ride your sled the more youll notice how its running. keep it fat and work your way down in little increments.

I hear what your saying... but you go by EGT's and not A/F on two strokes right?

[lark-o]

I hear what your saying... but you go by EGT's and not A/F on two strokes right?

yea EGTs. I think because of how much fuel is wasted on a 2 stroke you could never get a accurate A/F. plus all the soot would plug a o2 sensor.

[waterbug1999]

yea EGTs. I think because of how much fuel is wasted on a 2 stroke you could never get a accurate A/F. plus all the soot would plug a o2 sensor.

ill look into some over the summer.. it would totally take out the guessing game.

[lark-o]

ill look into some over the summer.. it would totally take out the guessing game.

yea and you can always take them off and put them on a different sled. Ive thought about buying a set but just never have.

[1moretoy]

I really like my efi might not be the fastest, but I sure as hell dont have to dick around with jets.

Now to just dick around with the clutch to get it right

Clutching is more important than dropping a jet size or throwing in some reeds. You'll gain nothing if it can't put it to the ground.

I'm still running the same jets Arctic cat put in the day they made it. I never changed a thing on my motor. It's all clutching on mine. The whole tweaking every little last bit and running it on the edge thing baffles me. People will spend $$$ on jetting, reeds, pipes, blah blah blah and now EGT gauges, and think they're going to break record speeds, when actually they may only gain 2mph WTH Just run the damn thing and enjoy it. I'd rather pull the rope and ride than try and figure out what jets I'll need in the morning and than swap them in the afternoon because it's warmer out, and then switch back at night because now it cooled off again. DUMB. If you want to go faster, buy a bigger sled for christ sakes.

[1moretoy]

I hear what your saying... but you go by EGT's and not A/F on two strokes right?

Jody, go by the piston wash and plugs. You are really thinking way to hard and that is when things go wrong. You'll end up going from one extreme to the other. Baby steps my friend, baby steps.