need viper jetting for 9000 feet

maxdlx

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Joined
Nov 30, 1999
Messages
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Age
55
Location
Tipton, Iowa
I need to know what you guys are running on a piped viper at 8000 to 9000 ft. If you can tell me your clutching to that would be great. Maxdlx
 

6700 to 8300 is 146.3 with 52.5 pilots and 2 7/8 turns out at same temp as stock and 8300 to 10000 is143.8 w55 pilots at 3 1/8 turn on screws
 
02 Viper 136 x 1-1/2
CPR pipes head mod
8ek no rivets stk spring
43' helix silver spring 80' twist I think
19 top 41 bottom gearing 68L ??
9 tooth drivers
holtman Atacc installed
jets 162.5 162.5 165
pilots 47.5 47.5 47.5
needles 3th groove washer top & bottom
fuel screws 1.75 1.75 2
all stock carb parts
2 flo-rites, ram air filters, air box prefilter, 1-1/2" hole drilled in each ram air duct to dump air right into the air box
all under air inlet to air box are duct taped off, to suck only outside cool air, from ram air and flo-rites
and still tuning LOL

PS dont you have Aaen pipes?
 
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Yes aaen pipes, and Tom that works just perfect, cause I can beef that up to what I need. I may just jet for here, and run the vari flow. Still hoping for UP snow. Maxdlx
 
paul, contact one of the cody's (jr, or sr) at http://www.snowyrangetours.com/

they have a link to ty on their shared links page.

they are the yamaha high altitude spec engineers. they will put you in the right direction. dont use the tempaflow at all. (you will be sorry). cody told me last year to run main jetting for temp (approx 150-155), and 55-62 pilots clips at about 2-3. it isnt that you need more pilot fuel range in the mountains it is you dont have enough air saturation to draw the fuel from the pilots while at altitude. i rode one of their rental mountain vipers after being tempablowed, and it was crisp and ran well. ski
 
Ski
Hey Thanks. I sold the tempa flow, and got a vari flow. That way I can jet fat and back up. Figures I sold my 55 and 60 pilots, and now I need them back. LOL I will look them up if we go that route. Paul
 
maxdlx said:
Yes aaen pipes, and Tom that works just perfect, cause I can beef that up to what I need. I may just jet for here, and run the vari flow. Still hoping for UP snow. Maxdlx

Max, Call Aaen & they will send you their jetting specs for the mountain riders. I ment to look last night but failed to do so. From what I rememeber they run 140 mains & up on the pilots.
 


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