NoBrakes!
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I bought a 500 fan cooled venture basically a phazer... the previous owner had lost the air box and put UNI pods on. I am looking to source an air box but was wondering, how many sizes do you need to add for pods?
How many jet sizes for UNI pods
- Thread starter NoBrakes!
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cattechsummitrider
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We used to go up 2 on the bigger motors and up one on the needle then adjust the air screw as needed
good luck
good luck
pfi572
Active VIP Member
What’s the plugs look like and piston wash , compression ?
Previous owner must have ran it ?
He may have richened up already ?
Previous owner must have ran it ?
He may have richened up already ?
snopro
Active VIP Member
Yep on the old Rotax 670's we would go up 2 sizes on the mains and pull the needle 1 clip as well
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NoBrakes!
Active VIP Member
Butterfly carbs. Old owner Burnt 2 pistons after installing pods. I am sourcing an air box.... And doing a top end lol
thanks guys!
Got a new family wagon!
or am I looking for another issue? 2 pistons with holes... carbs were professionally cleaned supposedly and The missing air box was a bit out of budget... pods were cheap... motors fawked after 50 km of ditch bangin
thanks guys!
Got a new family wagon!
or am I looking for another issue? 2 pistons with holes... carbs were professionally cleaned supposedly and The missing air box was a bit out of budget... pods were cheap... motors fawked after 50 km of ditch bangin
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pfi572
Active VIP Member
Probably mid range burn down on a sled like that ?
A set of power jets would fix the mid range fuel and top end as well .
Longhairfreak
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I would drop at least 5. On my Mach Z with K&Ns I was 9 jets smaller. Ran like a champ. My friends would always tell me to slow down LOL.
teeroy
Active VIP Member
I put a set of pods on an old 583 and I had to drop jet sizes. They were far more restrictive than the airbox on a 1996 MXZ 583. Made more oomph with the airbox on with the mods I had done. 501 rotary valve, shorty intake boots, and twin pipes. It would flat out destroy any 700 and hang with the triples until the big end.
retiredpop
Active VIP Member
There was a mod to richen the midrange on those carbs. Unfortunately the parts are no longer available. The mod was to replace the primary nozzles with different nozzles that had a thru hole or in other words there was a hole in the airbox side of the nozzle and a matching hole on the engine side. The stock nozzle only had one hole on the airbox side. I did that mod after burning up a phazer engine when I piped it and never had a problem after that.
If you feel adventurous you could drill your nozzles.
https://totallyamaha.com/snowmobiles/aaTECH/carbs/PhaserCarbs.htm
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NoBrakes!
Active VIP Member
Doing some research and pods on a phazer/venture and they blowup...
they like the airbox, not a lot of others do but history speaks.
shout out to Mots Machining, they're going to bore both holes and supply all new parts. Cast iron bores, no Nikasil. Do it right the first time and get an air box then it Should be good for a loooong time after.
they like the airbox, not a lot of others do but history speaks.
shout out to Mots Machining, they're going to bore both holes and supply all new parts. Cast iron bores, no Nikasil. Do it right the first time and get an air box then it Should be good for a loooong time after.
TROLLCAT
Active VIP Member
you got a air box lined up !?
what year is your machine
what year is your machine
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- #13
I have gotten stuff for older sleds from these guys before. They are on Yorkton Sask
https://snoworld.ca/
https://snoworld.ca/
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TROLLCAT
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me thinks I know where there are a couple of dead phazers
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retiredpop
Active VIP Member
Have you queried on http://partshotline.ca/request/ ?
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NoBrakes!
Active VIP Member
So I got the top end parts back from Mots, everything looked perfect and besides launching a wrist pin clip into the abyss... it’s all back together. Reused 1 clip and 2 needle bearings.
i sourced an air box but I’m still waiting for the rubber boots that connect the carbs to the box, should be this week from Yamaha.
is there anything I should check before first fire up? The lean burn down has me wondering if the carbs are on spec. Reading about the butterflies, there’s not much tuning you can do so should I assume it’s good? They were cleaned “professionally” this fall from what I hear.
fire up, warm up, short ride, check plug colour? I don’t really want to run it to high rpm for some time right away to really see on the plug?
rookie....
i sourced an air box but I’m still waiting for the rubber boots that connect the carbs to the box, should be this week from Yamaha.
is there anything I should check before first fire up? The lean burn down has me wondering if the carbs are on spec. Reading about the butterflies, there’s not much tuning you can do so should I assume it’s good? They were cleaned “professionally” this fall from what I hear.
fire up, warm up, short ride, check plug colour? I don’t really want to run it to high rpm for some time right away to really see on the plug?
rookie....
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