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1998
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  1. MXZ / Legend / Summit / Grand Touring / Formula
    Took the 1998 Formula Z 670 out for a final rip yesterday. Here's what happened. Starts fine on first pull. Idles perfectly. Runs well. No issues with throttle. 135psi on each cylinder. When 3/4 throttle, it runs around 6000rpm's (according to gauge). At full throttle it revs up to...
  2. MXZ / Legend / Summit / Grand Touring / Formula
    I bought the Summit X 670 last winter and only got a couple of chances to ride it. The first time it had water in the fuel from being left outside, but a little gas line antifreeze ran through it and it ran perfectly; had full power, started easily, and would idle on it's own. Now this year I've...
  3. MXZ / Legend / Summit / Grand Touring / Formula
    My stock hand warmers melted the grips right around the same time all my lights conked out-- head, tail, and instrument. I installed a new voltage regulator and now the lights are fine (new bulbs of course), but the warmers don't warm. I assume they are cooked, just like the bulbs-- unless...
  4. MXZ / Legend / Summit / Grand Touring / Formula
    Hey guys got a 98 skidoo grand touring 700 triple dies randomly at times i can drive 30-40km sometimes only make 20-40ft and it stalls , doesnt bog down just turns off as if someone hit the kill switch , sometimes fires up right after or after waiting 5-10mins fires up again and same issue
  5. MXZ / Legend / Summit / Grand Touring / Formula
    Hello riders, I just bought a '98 Summit X 670 and I'm in the process of bring it back to climb mountains. I came from a Nordic 50 from which I asked and obtained even too much :), ever tried climb a mountain on fresh snow with a similar sled? lots of fun.... and blasphemy :lol: It looked...
  6. Mach Z / Mach 1 / Formula III Triples
    hi everybody, i bought a 1998 formula 3 700 triple not to long ago. runs good, but the temperature guage doesnt work. it came stock with the 4 guages, temp, tach, spedometer, and fuel guages. did a continuity test, theres power to and from the guages, the guage lights up, but with driving the...
  7. Mach Z / Mach 1 / Formula III Triples
    Hey everybody, a couple times this season, my coolant was a little low, maybe a cup or two. Putting it on the trailer for storage, I noticed a little bit of white smoke. It never gets hot, the plugs all look good, so I can't tell which cylinder might be leaking. Is there something that might...
  8. Vintage Ski Doo's
    I have a 1990 617 mach 1 otherwise known as the mach ton. I rode it this year and decided I hate the chassis. I just bought a 1998 670 chassis and plan on dropping my motor into it. Does anyone have any advice or will this even work? Also my motor runs great once you get it started... once I...
  9. Mach Z / Mach 1 / Formula III Triples
    Recently purchased a 98 Formula III 600. Took the sled to someone after it only made it 4 miles. 35 years of experience and he only had to listen that it was the crank bearings. Unfortunately he was 5 hours from home. Took it to the mechanic who worked on it from the guy i bought it from...
  10. MXZ / Legend / Summit / Grand Touring / Formula
    I used the water trick to pop the primary clutch free from the crank shaft on my 98 Grand Touring. But I don't have room to slide the primary off of the crank shaft. It hits the side of the plastic belly pan/body panel. I even separated the moving sheave from the fixed sheave and I still can't...
  11. Mach Z / Mach 1 / Formula III Triples
    I am building a sportsman 600 oval sled out of a 1998 FIII. I am wondering if any of you have experience with offset timing keys. The engine and cdi box have to stay stock, but I have dynoport pipes on it, and am looking for some extra power. The oil injection system has been removed, and I am...
  12. Sleds For Sale
    ****SOLD**** 1998 Ski Doo MXZ 670 6263 miles. This was the wife's sled, replaced it with a Rev as she wanted Electric Start and reverse. This is one of pair of sleds I purchased 6 years ago with about 400 miles on them. This sled is nearly perfect, no damage, no rust, no dents, no rips. Sled...
  13. Mach Z / Mach 1 / Formula III Triples
    I have a 96 Formula Z 583 that is in rough shape but seems to run alright. I picked up a 98 MXZ with no engine for $150 that looks real good and want to swap it over. I know the Form Z is an F series and the mxz is an S series frame but not sure what it will mean for an engine swap. Is it...
  14. MXZX Race Sleds
    Does anybody know where I can purchase an owners manual for a 1998 MXZ 500 Ski-doo
  15. Mach Z / Mach 1 / Formula III Triples
    alright so I have the motor out, and while its out ive heard that I should move the box underneath and look for chaffed wires? where is the best location to move that box? and what wires are most commonly chaffed? I have zero chaffed wires with 3900 mi, but while the motor is out I want to find...
  16. Sled Parts For Sale or Trade
    Need some more room in the garage and some money to finish my other projects. Heres a list of everything i have for sale, PM me, email me at [email protected] or text/call at 715-816-4373 questions or for pictures. All prices are BEST OFFER. 1993 Mach Z Crankcase-$150 95' Mach Z...
  17. Mach Z / Mach 1 / Formula III Triples
    I have a '98 Formula III 600 triple/triple. 2 of the 3 pipes rotted out yesterday on my ride and are un-repairable. I would like to convert the full system to that of the '98 Formula III 700 with a collector into one single pipe because I have easy access to a full system on craigslist. Does...
  18. Wanted To Buy
    Just what the title says. Picked up a sled for my little brother, has a junk seat and a cracked front bumper. Front bumper is black, so is the seat. Let me know what you have.
  19. Mach Z / Mach 1 / Formula III Triples
    So I have a 1998 formula 3 600, and I want to paint the hood vents yellow to match the skis and other accessories on the sled, I was able to get the middle vent off, and the side ones off, but the 2 lower vents are giving me a hard time and I was wondering if anyone was able to figure out how to...
  20. Mach Z / Mach 1 / Formula III Triples
    Hey, I have a 1998 formula 3 600 triple. One of the cylinders continues to foul plugs more often than any of the other cylinders. What adjustment in the carb do I have to make to prevent this?
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