I just got it home kind of excited even tho it was 57 degrees today I have been told they come rich.420 mains.50 pilots,Have been told that they need 400 mains and 45 for a pilot,Im in wis.under 2000 feet.Should I run a tank of fuel with oil mix first or rejet right away.Thanks for any help.Any other sugestions appreciated.

I got 400 mains and 45 pilots.Got the sled this spring as a new left over.The head wrencher told me they are rich stock so there is no problem breaking it in with the new jets.Before I did it I talked to several people that had them over the winter and they said the same thing.Alot of them said it was loading up during idle.

I have a 600 Fuse with 800 miles on it. The sled would load up pretty fast at idle and was sluggish off the line. Went to 400 mains and a Tempa-flow.

I went to 400 mains and a Temp Flow after 300 miles but never had a problem with loading up at idle. Might be a good idea to run a couple of tanks of gas through it before doing anything with the pilots since all of the 600s do not have the problem loading at idle.

i would run it for a few miles as it is and see what it is like.My 600 was fast out of the create and got better as the miles went on.I can beat my buddies 800 pro x by a ski tip every time out.You will find after 1000 miles better gas mileage as well.At the end of the year i was getting 14-15 mpg.1850 very happy miles on my fuse 600 last year and i'm not changing a thing!!

Fusion Guy
That sounds great It just seems that as the talk goes 400 mains preform better I have no prob putting a few miles on it first to check it out.The only thing that I was thinking is it looks like kind of a pain in the ASS to rejet and if 400 is a good safe # <not to lean> it is easier doing it now,but the motor is brand new and running stock is more than likely the safest.Thanks

Still running 420 mains in mine after 900 miles. A touch on the fat side but I'd rather add
spark and air then get rid of fuel. Mileage isn't that big of a deal to me.

I found turning my fuel screws in to 1-1/2 turns out from the lightly seated position helped
a TON with my fat idle on mine. I will be trying .7 paj this year too in place of the .6's for the
fat idle concern. Would rather leave my pilots alone so I don't have to babysit it when it's cold.
They do have a wicked lean spot in the midrange so the needles should be good stock.

my 600 HO l'm running 400 mains an .35pilots and runs good. the .35 pilots helped out alot on low end and mid range alot. All 600HO are loading up because of the pilots. .45 are stock pilots it's to fat with .45's. It will help try it and it will be safe under 2000 feet.

My dragon came from the factory with 50 pilots put 45,400mains and .9 paj alot of dealers in my area are doing this due to idle load up.mine was so bad ,one time I had to get off and push it and hold the gas down sad very sad.I couldn't even race anyone due to loading up waiting at a line for people hopefully it 's fix now.

My 01 XC 600 had .9 paj's in it and would "hang" the idle terrible after coming to
a stop. I am NOT going back there again. One step up on the paj's should be good
enough.

I'm also leaving my pilot jets alone. I like how it starts/runs cold and the mid range is
already wicked lean.

You're right it's pretty tight, but if you disconnect the oil line going to the pto carb, it gets alot easier.

I also had problems with loading up at idle, real slugish in take off lots of smoke. hard to start when warm
dealer recomended not rejetting could void warranty. Went to another dealer with problems and he said rejet!!!! He would rejet all 600"s b4 sending out the door. I had 400 mains put in and couldnt beleave the differance it really brought it to life!!!! in the grass 57 mph in 400 ft went to 68 mph with the new jets :banana:

Very lean pilots, not recommended. You are better off adjusting the screws, messing with the PAJ's first. Many people do not realize how much affect the pilot has on WOT and how they can save you when you let off on the throttle. You are better off to run a little lean on the mains and go up in the pilot IMHO.

I left mine jetting stock and add an tempa flow, I was under the impression that the tempa flow and the adjustment with the screw you wouldn't need to rejet to 400.

I heard the fuel screw makes a difference cause the tempa flow can't adjust that.

One more question I added the SLP flow rites (two) on the dash and going to add the vents on both sides of belly pan is this going to make a differencewith tempa flow and the sled in general ( loading up etc)

Trust me you don't wan't to run too small of a pilot. Last year on night lake crossing with small pilots the muffler was glowing. Was cruising about 25-30 mph for about 10 minutes. Was a little too lean

I agree with the lean spot at 30 mph- You should be able to get most of the load up curred with the fuel screws- stock is 1 1/4 turns- I have read on this site that the range can be between 1 and 2 turns out.

I hope going down to 400 from 420 on the mains and 45 from 50 on the pilots will not be to lean.From alot of the other posts I saw that seemed like a good #. Im running at 12-1800 ft.

I had the 40 pilots in last year. No bog but would run too lean at 30 mph-going to change to 45's this year

r.a.

I have your same set up (400 and .45) and ride in WI and UP of MIch and Canada. I rode safely last year at -10.

13 mpg with hard riding.

Enjoy.

My set-up sheet that came with the sled says the fuel screws are supposed to be at
1.25 turns out. The service manual calls for 1.5 turns out. Mine were at almost 2 turns
out when I checked them If you let it idle for more than a minute or two and
then wacked the throttle to the handlebar, the thing would act like it had a damn rev
limiter it was loaded up so bad. Set mine to 1.5 turns out, problem solved. Still just
a touch rich at an idle so I will go with the .7 paj's this year for that.

Again, definatly not changing my regular pilot jets. I have seen alot of sleds go
down from too lean of a pilot. I may try 400 mains yet again this year but we'll
see. :cn:

My dealer put in the 45 pilots and .9 paj's and said that I should have no concerns of it being to lean.I put in 400 mains last year and lowered the needle and it helped the mid and high end but still would load up at idle.I raised the neddle back up to where it was after they did the pilots.If it's a little too lean they said to adjust the screws out some more.Or if to lean I'll put the 50's back in or some people say raise the clip a notch.

Lowering your Needle would make it leaner yet. The Fuse6 came with the needle clip in #2. Lowering the needle would have put you in the very top clip position. Do you mean you lowered the clip, which would have been position 3 ?

The problem I had last year is when I would test my sled at home on the local pond (elevation 400') It would not load up (or bog) off the line. Where I ride in P'burg (2000') it would bog off the line all the time. I guess that means I should have a rich bog, correct? I dropped to .45 pilots at the beginning of the year and didn't help. My brother went even smaller and his would cook the exhaust at light throttle postions while cruising slow. What next? Maybe that damn Tempa-flow is causing it?

I think AFJ would agree. Did you try disconnecting it?

I think I'm going to remove it. I noticed also that the cylinder that I took the vacuum signal from always ran leaner. I ended up going up 1 jet size on that size for peace of mind.

Just in case it helps for those with pre-600HO tempa flows(same tempa flow/ differnet instruction sheet)....... FYI

These are the jetting recommendations From the installation sheet provided with the Holtzman Tempa-Flow (Fusion/IQ) (10/20/06)

Jetting At 1800' elevation, 93 octane fuel, and with the Tempa Flow adjustment screw 1/8 turn counterclockwise, we ran stock jetting(pilots, fuel screws, and needle position)except for the main jets which we reduced from 420 to 400. Your application may vary. If operating close to sea level, the screw should be turned back to the stock position. Counterclockwise rotation of the screw leans ALL Circuits (pilot, needle,main jet).

Altitude Adjustment is approximately 1/8 turn counterclockwise on the screw for every 2000' (600 meter) increase in elevation effective up to a 6000' change depending on the temperature. Don't forget to turn the screw back when descending. If desired, you can remove all but one of the 1/4" hose barbs on the reducer fitting and drill to .203" (13/64) to give an 8000' range.



Personally I'm going with the .7paj 50 pilots and 400 mains. The 45 pilots I had in last winter were a bit lean around 0 degrees F, but the 400 mains worked perfect. :div20:

Crap racerdave that's is what I meant to say brain fart :div20:

Why not just pull the fuel screw out 1/4? I see alot of P and PAJ changes when the fuel screw is very effective in-itself. I run @ 2k~3k feet elev and run 400's with stock p & paj with screw 1 turn out, I had needle raised due to overly lean mid but that went away with some miles so its back to stock position. Is it me or is that airbox a beeyotch sometimes?

Air box does suck to remove. I remote mounted my coils on the oil tank-will post pic this weekend

I moved my coil over to the side of the box, near the cdi.

hondafixer you or racerdave have any pictures yet of coil relocation?

Here's what I did. Just have to extend the coil input wires so they will reach. Took about an hour to relocate the coil.

Here is my setup

Thanks guys for the pics.. I apperciate it

this may sound kind on dumb, but how do I tell if my set up is too lean or rich. Granted this is my first new sled since 97 and so far with my 275 miles on, I can't tell if mine is set up right. .
I run in upper Minnesota area by Duluth, and so far i am happy with performace. It runs like a raped ape and handles like a dream. I am not to keen on running my sled to the dealer and asking them to change out the pilots and mains.

How can I guy tell if they have the right one's in???

I got a little confused after reading all of the responses here.....is this jetting set-up the best to use on an otherwise stock 600HO switchback, will this also work with the timing advanced to 28*?

I put a SLP airbox on and put the stock jets back in. The other set of jets is a good for a stock sled not sure with timing advanced.