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In general,how does the 670 engine rate for longevity and durability? I'm looking at a 1997 MXZ 670 with 1250mi. that is for sale locally. I'm not real familiar with the 670. The sled has HTG pipes on it, which I'm not crazy about. The sled looks good and clean, but the mileage seems too low for a 1997. How do you tell if the mileage is actual?
Thanks.
 

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scotstr said:
In general,how does the 670 engine rate for longevity and durability? I'm looking at a 1997 MXZ 670 with 1250mi. that is for sale locally. I'm not real familiar with the 670. The sled has HTG pipes on it, which I'm not crazy about. The sled looks good and clean, but the mileage seems too low for a 1997. How do you tell if the mileage is actual?
Thanks.
[snapback]723344[/snapback]​
That 670 is very solid and dependable, a real torque monster. Not sure about the pipes, stock one works really well.
 

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scotstr said:
In general,how does the 670 engine rate for longevity and durability? I'm looking at a 1997 MXZ 670 with 1250mi. that is for sale locally. I'm not real familiar with the 670. The sled has HTG pipes on it, which I'm not crazy about. The sled looks good and clean, but the mileage seems too low for a 1997. How do you tell if the mileage is actual?
Thanks.
[snapback]723344[/snapback]​
One of the best motors Ski-doo has ever made. Would love to put one in a Rev chassis.
 

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The 670's last a lot longer the the 800's out here in the mountains....good motor.
 

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My 800 has 11,000 km on it, and my 670's crank came apart at 12,000.....I'd say they're about the same, in my case. I don't know how much longer the 800 will go, but I'm thinking I should do the top end after 5 season of riding. Not sure about the crank, maybe I should just replace it before bearings start failing.

Before the 670 went, I too thought they were indestructable motors, but this one was babied as few others likely are (warmed up, summerized, rarely pinned) and it went anyway.
 

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I have a 97 mxz 670 and it is a tuff sled. The 670 is agreat motot lot of torque at low and mid range. This sled hook up hard w/ only 96 picks. Ithink the hp is 115-120? Any body know for sure.
 

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silvercliff said:
I have a 97 mxz 670 and it is a tuff sled. The 670 is agreat motot lot of torque at low and mid range. This sled hook up hard w/ only 96 picks. Ithink the hp is 115-120? Any body know for sure.
[snapback]728482[/snapback]​
Super torque monsters. And if it only has 1,200miles on it, its got awhole century left in it for riding. Motor's are one of the most dependable ones out their.
 

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I think the 670 is good to about 4000 miles. Had to rebuild mine when a seal went and let antifreeze mix up with the oil. Cost me $850
 

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rchase513 said:
I think the 670 is good to about 4000 miles. Had to rebuild mine when a seal went and let antifreeze mix up with the oil. Cost me $850
[snapback]731402[/snapback]​
Wayyy more then 4000 miles on average, if they were all only good to 4000 miles then no one would ride them!
 
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