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1-20 of 93 Results
  1. MXZ / Legend / Summit / Grand Touring / Formula
    Hey doo lovers, Picked up a new to me '99 MXZ 670 HO over the summer that was in really good shape (eyeball test), but didn't run for last couple years according to owner. At the time of purchase it had good compression & spark. Took it home, drained all old fluids and put new crank seals in...
  2. MXZ / Legend / Summit / Grand Touring / Formula
    Hey everyone I’m having troubles with my 97 mxz 670 it has a really high idle (3600rpm) I’ve cleaned the carbs twice made sure I’m getting gas air and good spark adjusted idle screws and couldn’t get any change in rpm at all lean on fuel when I prime it it goes back down to regular idle (1800...
  3. MXZ / Legend / Summit / Grand Touring / Formula
    Hey yall, I'm looking at this 1999 formula 670 (red one) with 3400km on it, guy wants 3000, hoping to get it for 2500, does anyone know how much Insurance is for one of these? Guy told me it was 600 a year for these things which seems impossible. I'm in the Ontario area. Hoping to get this, guy...
  4. 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...
  5. MXZ / Legend / Summit / Grand Touring / Formula
    Just blew up my 97 MXZ 670. I have three 670 motors to take cylinders from. The two best cylinders are stamped with a "2". All three sets of cylinders came with a cylinder stamped with a "1" and a "2" Cylinder. I looked them up, and all 6 cylinders have the same part numbers. Is there a...
  6. 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...
  7. MXZ / Legend / Summit / Grand Touring / Formula
    I am looking for a 670 HO single exhaust pipe. It is going on a 1998 Summit X 670 with the HO motor. These pipes are getting hard to find however the snowmobile that I bought and bringing back to life has the standard 670 pipe. I am hoping someone on the forum has one tucked away that they...
  8. MXZ / Legend / Summit / Grand Touring / Formula
    Having trouble finding the year this 670 Rotax is. Has a bar code ID on it and the recoil is on the outside, so it's 95+. I'm thinking this is out of a 96 MXZ 670, can anyone confirm? Just the engine, this rotax was swapped into another chassis. There is a D stamped on the head. The bar...
  9. MXZ / Legend / Summit / Grand Touring / Formula
    Going to tear into my 670 clutches and rebuild/freshen them up with new bushings springs, rollers, etc. Only pulling about 7500 rpm on clicker 6. Sled is a has a 136x2" track, 8t drivers, 19/44 gearing. Should i stick with the 286 ramps, violet/yellow spring, and beige secondary? Or what would...
  10. Vintage Ski Doo's
    Hi all, Fixing up my first sled ever 1994 Ski Doo Mach 1 670 with the help from the shop manual. So far I've flushed the gas tank, put new gas lines in and cleaned the crap outta carbs, new plugs. Rides and runs great besides a couple things below. Fuel leaking out the overflow lines on MAG...
  11. MXZ / Legend / Summit / Grand Touring / Formula
    Need help diagnosing a problem with my 1996 Ski-doo Grand Touring 670SE. The oil in the reservoir appears to be draining into the crank case when the sled sits over the summer. Looking for tips on diagnosing where the problem is. From what I understand it could be an inner crank seal problem...
  12. MXZ / Legend / Summit / Grand Touring / Formula
    Hey I have a 583 summit that I want to adjust the clutch so it engages softer and at a lower rpm for better trail riding. Has anyone done this or know a way to do it
  13. MXZ / Legend / Summit / Grand Touring / Formula
    HI guys and gals, I have a '98 Summit X 670 which have worn-out the ski, have got an offer for the new original BRP one for about $60 each. Do you think they are worth the cost (compared to alternative ski design)? I have seen there are aftermarket alternatives with really different designs...
  14. 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...
  15. MXZ / Legend / Summit / Grand Touring / Formula
    so i got a 1995 grand touring chassis formula 500 hood and a 670 engine from a 1993 mach 1, im trying to wire up the lights and gauges properly but cant get it it the hood connection or where the three wires connect to the break and lights. at the bar any help sorting it out be greatly appreciated
  16. Mach Z / Mach 1 / Formula III Triples
    Hey guys correct me if I am wrong I'm new here but I could not find anything about this. Just bought a 1993 Mach 1 670 was running very well other than the sled wouldn't idle by its self until it warmed up figured it would need a carb cleaning. So here's the story I was ripping the sled and it...
  17. Vintage Ski Doo's
    anyone have pipes for a 670 and or 583 for sale. Looking to put on a F2000 chassis or PRS chassis.
  18. MXZ / Legend / Summit / Grand Touring / Formula
    I recently picked up a 1995 Grand Touring SE with the 670 in it. The sled had a starter and battery already on it but no ring gear for some reason. I picked up a ring gear for it and a new battery. Made sure the starter still worked and after cleaning the terminals on it everything was...
  19. Vintage Classifieds
    The sled is in good condition, runs good! 1996 Mach 1 670 twin with 44mm carbs · Pulled from storage, cleaned carbs added fresh gas and started right up. · Suspension upgraded to a SC III from a 2002 MXZ. · Track in good shape as well. · There...
  20. MXZ / Legend / Summit / Grand Touring / Formula
    Have been fighting with a very serious mid to high RPM bogging issue on my 98 Summit 670X. After concluding it wasn't fuel system, carbs, spark, compression, air leak, clutches etc., I finally took the air box off, and it ran perfect. The difference is drastic, easily double the power and...
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