The Ski-Doo MXZ 670 HO was one of the most powerful twin-cylinder Ski-Doos ever built. It was powered by a 2-stroke, 699cc, Rotax 670 HO (High Output) engine that delivered 125-128hp on the dyno. It was more powerful but tended to be less reliable than the 1997-1998 MXZ 670 .

2006年10月11日 · The big difference between the std 670 and the HO is the stroke. The HO has a longer stroke and larger ports, Better exhaust, improved head desig, 44mm carbs, and dpm helped a little. I have an MXZ 700 that has been worked, and my boss had a 670 HO that was also worked and the only time I got away from him was on very top end.

2016年2月29日 · My 670 HO has 9000 miles on it. All original motor, compression is still 135/130. On it's 3rd recoil, 2nd exhaust system (rattled apart), and I've replaced some bearings here and there. Other than that, it's been super reliable. Gas, oil, pull the rope and go. What makes snowmobilers think it's ok to take the inside on blind corners?

The Ski-Doo MXZ 670 was a high-performance trail snowmobile marketed in the late ‘90s. It was powered by a 2-stroke, 669cc ROTAX twin rated at 118 horsepower. This lively Ski-Doo twin was the predecessor of the more powerful MXZ 670 HO, as well as the MXZ 700 and MXZ 800.

2010年11月2日 · Well the sled in question is a 1999 MXZ 670 H.O. in very good condition, stock engine, one owner, 2,300 miles, clutched, upgraded rear springs, good track, 194 studs, upgraded skis, $2,000 obo. Now to me $2,000 seems a bit high for this sled but i …

2015年1月20日 · I have a very nice 99 670 HO but have never heard of this special edition. What is the difference? Some of the photo's on here look just like mine.

2013年1月12日 · Looking at a few used sleds lately, and was wondering if there are some concrete ways to identify a 670 ho motor versus a 670? Is there a different model number on the engine tag, numbers on the heads, cylinders, etc.? Is the chassis the same, or are there certain serial numbers for an ho chassis?

2002年11月22日 · Well the difference between a regular 670 and the HO is that the HO came with different porting, different head, diff. pistons, higher compression, 44mm carbs, and to my knowledge the short y-pipe. 1999 MXZ 670 H.O. 136"

2005年12月19日 · I have had a 98 Mxz 670 since 2001 and love it. The low end torque on these are great. I put a 1.250 track on it and it hooks up great. I raced a 05 MXZ 600 HO last week and took him easily and I weigh about 50lbs heavier than the other rider, plus I think his sled weighs about 60lbs lighter than my 98

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