Yamaha MountainMax 700 PSI Pipes

Meizlern

Meizlern

New member
Joined
Dec 12, 2013
Messages
17
Location
Rognan, Norway
Hi guys, just got a new "old" snowmobile. This is a Yamaha MM700, it's mounted PSI triple pipes but the "nozzle" is original. Whitch size on the "noozle" would be best for getting maximum of power out of this pipes?

Sorry for bad english, needed a bit help from google translate. :rocks:
 
You run the stock nozzles with those pipes. q-8/q-4/q-4
pilots--45
fuel screws -3 turns out at 0- 3000 ft,-2 turns out at 3- 6000 ft and 1-3/4 turns out at 6- at 10000 ft.
slides are stock
needles are 0-3000 ft- 3/4/4 pos. 3-6000 ft- 2/3/3 and 6- 10000 -1/2/2 pos.
Main jet 0- 3000 ft-142.5/ 142.5/142.5, 3-6000,-137.5/137.5/ 137.5 and 6-10000 are-132.5/132.5/132.5.
these are pretty well tested specs. and are good to -10 degrees
cluthing for MM 6- 10000 ft
8ch weights with 3.1 g inner hole and .8 outer
w/s/w primary
sec. spring /green
52/42 helix
60* twist
9000 rpm
 
yammy said:
You run the stock nozzles with those pipes. q-8/q-4/q-4
pilots--45
fuel screws -3 turns out at 0- 3000 ft,-2 turns out at 3- 6000 ft and 1-3/4 turns out at 6- at 10000 ft.
slides are stock
needles are 0-3000 ft- 3/4/4 pos. 3-6000 ft- 2/3/3 and 6- 10000 -1/2/2 pos.
Main jet 0- 3000 ft-142.5/ 142.5/142.5, 3-6000,-137.5/137.5/ 137.5 and 6-10000 are-132.5/132.5/132.5.
these are pretty well tested specs. and are good to -10 degrees
cluthing for MM 6- 10000 ft
8ch weights with 3.1 g inner hole and .8 outer
w/s/w primary
sec. spring /green
52/42 helix
60* twist
9000 rpm
Click to expand...
Thanks both of you, 145 nozzle.. i will try..

Sorry yammy, but i didnt understand very much of that :-|
 
let me simlify'

pilot 45
fuelscrew 3 turns out
slide 3.5 (stock)
nozzle Q-8/Q-4/Q-4(pto/mid/mag)
needle 3rd/4th/4th,Pos
main jet 142.5/142.5/142.5 (pto/mid/mag)
this is for
0-3000 ft elev.



for 3- 6000 ft

pilot 55
fuel screw 2 turns
stck slide
stock nozzles
needles 2nd/3rd/3rd/ pos (pto/mid/mag)
mains 137.5/137.5/137.5


for 6-10000ft
pilot 62.5
fuelscrew 1 3/4 turns out
stock slides
stock nozzles
needles 1st/2nd/2nd
mains 132.5/132.5/132.5
 
yammy said:
let me simlify'

pilot 45
fuelscrew 3 turns out
slide 3.5 (stock)
nozzle Q-8/Q-4/Q-4(pto/mid/mag)
needle 3rd/4th/4th,Pos
main jet 142.5/142.5/142.5 (pto/mid/mag)
this is for
0-3000 ft elev.



for 3- 6000 ft

pilot 55
fuel screw 2 turns
stck slide
stock nozzles
needles 2nd/3rd/3rd/ pos (pto/mid/mag)
mains 137.5/137.5/137.5


for 6-10000ft
pilot 62.5
fuelscrew 1 3/4 turns out
stock slides
stock nozzles
needles 1st/2nd/2nd
mains 132.5/132.5/132.5
Click to expand...

i have psi pipes. i agree with yammy. i'm at 800ft.

i jet for 0-3000ft and it works for my redhead.
pilot 45
fuelscrew 3 turns out
slide 3.5 (stock)
nozzle Q-8/Q-4/Q-4(pto/mid/mag)
needle 3rd/4th/4th,Pos
main jet 142.5/142.5/142.5 (pto/mid/mag) and when it gets colder main jet 143.8/143.8/143.8 pto/mid/mag
this is for
0-3000 ft elev.
 
yammy said:
let me simlify'

pilot 45
fuelscrew 3 turns out
slide 3.5 (stock)
nozzle Q-8/Q-4/Q-4(pto/mid/mag)
needle 3rd/4th/4th,Pos
main jet 142.5/142.5/142.5 (pto/mid/mag)
this is for
0-3000 ft elev.



for 3- 6000 ft

pilot 55
fuel screw 2 turns
stck slide
stock nozzles
needles 2nd/3rd/3rd/ pos (pto/mid/mag)
mains 137.5/137.5/137.5


for 6-10000ft
pilot 62.5
fuelscrew 1 3/4 turns out
stock slides
stock nozzles
needles 1st/2nd/2nd
mains 132.5/132.5/132.5
Click to expand...

Thank you, now i understand a bit more. Could you explain to me what "slide" and "pilot" is, maby it helps with pictures. Thank you again for sharing your knowledge with me :)
 
Different sleds have different slides there just telling you that your stock slides are fine. Pilot is the pilot jet it is the jet that controls idle up to 1/4 throttle. in my opinion I would step up to 47.5 pilots its usually a standard that more than two turns on your pilot to go up a size.
 
chris700readhead said:
Different sleds have different slides there just telling you that your stock slides are fine. Pilot is the pilot jet it is the jet that controls idle up to 1/4 throttle. in my opinion I would step up to 47.5 pilots its usually a standard that more than two turns on your pilot to go up a size.
Click to expand...

Thank you, i got it! :)
 
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