99 phazer jetting specs please

[redbull660]

I have an sx chassis 1999 yamaha phazer 500. Its not the mountain type but I did long track it for the mountains. I noticed this last weekend when my son was riding it it would bog down and quit once and a while. I checked the plugs and they were real wet so Im guessing its running rich. We ride at around 8000 feet elevation. Can someone suggest what I should be running for jets at that elevation. Its been geared and clutched for that elevation so I know that should be ok.

 

[eddy]

JETTING

For your elevation I would start with changing the mains to 130. If the mag side is still wet go 125 and 130 pto. This is assuming stock pipe. 5 to 10 higher with pipe.

 

[redbull660]

Yes this one still has the stock pipe. After posting this I found a spec sheet on the internet that says the main jet should be a 143 but that is what yamaha recomends and Im sure its way too rich. Im going to take the carbs off tomorrow night and see what it has in it. Any idea on what the pilot jets and stuff should be.

Do they make an aftermarket pipe for these?

 

[redbull660]

I checked and it has a 130 on the mag side and 131.5 or something like that on the pto side. So as far as Im guessing its probably about rite as far as main jets go. Im not sure what the pilot jets are, I cant seem to see a number on them or the pilot air jet as the specs call for. All I know is at an idle when I hit the throttle it will bog down until it shuts off but if I feather the throttle it will get up and go. I then check the plugs after its been idleing and there real wet.

 

[Zachmandu]

Phazers can be very picky when it comes to air screw adjustment. As much as 1/2 a turn can create a bog. My advice- screw the air screws all the way in (counting turns so you know where you started), and then back them out 1 1/2 turns. Start the sled, making sure engine is nice and warm, and see how it responds. Back air screws out about a 1/2 a turn, paying attention to how the sled reacts. Once you start seeing results, try it in 1/4 turn increments. Now this isn't a cure-all for every sled... but I have had piped and modded phazers that ran right on the edge, and a 1/4 turn of the screw made all the difference in the world....
With a pipe, you wanna run 100 pilots. With the stocker, I believe that Yami installed 70's...
Stock phazer jetting was 143.8. I used to consistantly run two jet sizes leaner with good results. All of my riding has been from sea-level to 3000', so at your elevation I think that 135's would be a good starting point, possibly even 132's, and monitor engine condition from there......
I've got a Bender single pipe for that chassis if you are interested.