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the bone stock 779 that we parted out had 340-350-360 plus the power jet (cant read the numbers but they are not plugs) with bone stock pipes. the crank shop engine had way bigger (just blank right now cause I just worked 28 hours and taking a break right now) lol

we are sitting at 1000 feet...just weird how much fuel this thing might need!

EGT are low (1000-1050) so went down from the 410-420 set up to 400-410....made it worse so I pulled the plug out of the power jet and put in the only set I had besides the plugs.....performance came back but still low EGT.....going to add more fuel to mains tomorrow.....oh and the bottom end is...

I have same issue except stock ski-doo clutch and AC secondary in a ZX....guess I do the same? I should be able to "borrow" the kids secondary of his 670 summit and align mine.......how do I know what is the right belt? belt is tight!

My dog can hear anyone coming up our 300 foot driveway! She makes it VERY clear that they should not be there! She will rip any guy a new ass if he is wearing a hat or coveralls! She came from Mexico, so I guess my alarm is made in Mexico! Lol.

Not to sure where to post so I went here! I seem to have lost my air jets for my vari flow and was wondering if anyone has a set they want to sell or give me some exact measurements of the restriction? There is 2 for the inlet (1/2") hose (aluminum and brass) and 3 for the outlet (1/4") hose...

What should I mix oil to? 32 - 1 or 40-1 or??? I'm using amsoil synthetic and I run 91 fuel in everything!

so if my gas mixture 32-1 that means oil and gas have to go through the main jet....which mean less fuel is going through by I think 3% so on a 400 jet does that mean 12% more fuel needs to be added or go from a 400 main to a 410? I don't know......today I hate a modded engine.....but when it...

engine is a 779 triple Rotax.....was just wondering what is ball park for jetting if you add Pipes (jaws)? reeds? pods with no air box? and im sure this will screw it up but mixed fuel at 32-1???? stock jets are 390 (PTO) 380 (Cen) 400 (Mag) pilots are 40 (PTO) 45 (Cen) 45 (Mag)......I have...

was ready to pull a dozen times but I pulled first pull (not even half a pull) and she fired and idled great.....now tomorrow will be jet and tune.......went for a 10 second rip down the driveway and came back....this is not no 670.....lol but frickin loud....I need to run ear plugs cause my...

A friend had a .057" gasket so it looks like I will be in the safe zone but fat...... .077" ish if my math is right but will put it together and measure it again.....nothing is open on a Monday here to get say .040" gasket

well I checked the squish..... .035" which is with the .015" gasket.... if I put in the .022" gasket it will only give me .042".....what do I do? can I double up on these cause if I do that (both .015" and .022") I would get .057" squish.....or do I put that alum shim (.080") in with 515 as...

did some reading on here about ski's, well what fits what....it looks like the ZX is the same as the XP and I was told the ZX will fit the S (with some spacers) so can some one tell me if they put a set of XP ski's on there S? is the REV the same as the ZX?

anyone have 18 head bolts? 65 mm long? are they all supposed to be the same length? cant remember if it was Polaris or ski-doo that had a shorter bolt right at the exhaust? could have been my 900 lol

the head has been shaved 4 mm compared to the stock one......so we came to a sudden stop when we went to put in the head bolts......the race engine head bolts are to short......dammed if I can find the bolts for the stock engine I tore down 2 years ago.......guess Im off to the store...

I remember what the difference in the base gaskets was now after having both apart today......the stock 779 has a .020 base gasket and the race engine has a .080 shim with 2 base gaskets adding up to .100 ish.....the head looks like it was cut down .130......the set up now I have is stock 779...

PM me what your thinking?

its been years and yes my mind is playing tricks on me as I get older....I forget everything.....lol so do I just put a piece of solder down the spark plug hole until it hits the cylinder wall and turn the engine over by hand then pull it out and measure it with micrometer?

anyone know the torque for the cylinder bolts and head bolts?

I just opened up the new gasket kit and there is only one base gasket.....and it has no holes.....I just went out to look at the other 2 engines and they have no holes either......it has been 2 years since I looked at these engines but I thought they were different......guess it gets the one I...