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Discussion Starter · #1 ·
I did a compesion check on my old ladys sled cold mag side 80 clutch side 145.Took out power valves and front of piston melted rings still there should I just do one side or both.The sled has no speedo bought last year the guy told me it was a backup sled for oval racing its clean.What do you guys think ordering parts monday sled does not get rode hard.THANKS :dunno:
 

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145 is decent comp, but if you have to tear it down anyways might as well do both sides then you will know what you got.,Butter clean the carbs also.
 

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Good luck. The 99's were a nightmare !!! If you are off 1 size on the jets it will be a dog. If the temp moves 15 degrees it will change. Hell I think even riding east to west was diff. than north to south. GOOD LUCK !!!!
 

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I would do both sides at the same time. Top end used to cost me around $100/ both sides. About an hour job. BTW, I had great luck with my 99. Loved that thing. Gave me less fits than my '01. If I remember right, jetted at 280, clip 2nd from bottom and timing at -1. (upper midwest riding). Slowed the sled down a little, but still ran great and never touched jetting. Also, best handling sled I've ever ridden to this day!
 

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Discussion Starter · #5 ·
hos my bro bought your snowpros mine has 300 mains is that to much and does he have to change jetting. thanks
 

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My '98 is very similar to the '99's. I run 310 main's with the updates done to the needles/slide valves. I also run BR9EYA's, instead of the BR10's that is factory. I keep the timing set stock too. This set-up is running a bit rich, but seems to run fairly well at temps in the range of 10-30F. I don't like to keep messing around with jetting when I am trail riding, but when I am going out to the lake, I'll make some changes depending on the days temps.
 

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i have a 99 sno pro after the power valve change the sled ran great. later i took the 99 sno pro cylinders off and installed the 97- 440 non power valve cylinders and change the flywheel and stator and carbs the sled is slower on top but i did it to save money on the oil part for the valves .
 

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ZR429 - He should not have to touch either one. The motor in the mod was just put in last fall, but was rode in -20 and just starting to turn the plugs white and didn't seem to get too fat at +20. I hadn't touched jet or plugs in the last 3 trips (after it was dialed( ran great)). The 99 I hadn't changed jet sizes in the last 4 years. You can check with him (my carb settings are written on tape on top of the belt cover), but I'm real sure I had 280's, -1, and 2nd clip from the bottom, also BR9's. You'll be okay with 300's, just might be a little heavy on warm days. What you really need to watch is your midrange. When I first started to dial the 99, I thought it was a little lean in midrange, so I raised my clip. BTW, I rode norhern WI and MI, so climate should be the same.
 
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