The 1000 Machz are amazing sleds. But you have to make sure a few things were done to them and theres also a few things you can do to them to keep them running mint.
First thing is take it to the dealer and hook it up to the buds system. Make sure they check all the sensors for proper operation. And flow test the injectors.
Also make sure if it had the low pressure mechanical pump, that it was replaced with the low pressure electrical pump.
and check to make sure it has the latest 07 map that applies to your altitude level.
If all the passes your off to the races.
The Mach Z is one of the most inconsistent sleds out there. The key is to make sure the sensors are working and you have a good battery.
Charge your battery up fully. Then check it with a meter, If its less then 12.8 volts chances are its bad. Now with the meter still on it and the kill switch off. Hit the prime button (start/rer) if it drops below 12.5 its a bad battery. And even though when the sled is running it gets 14.7volts from the engine. It doesnt matter. If its less then 12.8 your sled will not run properly and guys have reported anything from poor performance to somtimes burn ups.
You can also install UNI filters in the air box. This sled has a big issue with sucking in belt dust and fibers that clump up in the reed cages. It sucks it right thru the door and airbox seal. Which brings me to my next thing, Clean the throttle bodies and reed cages.
And a lot of guys have installed autometer fuel pressure gauges, to moniter the fuel pressure between the filter and fuel rail. If the pressure drops from 58psi the sled will run lean and possible burn up. Having a gauge is a safegaurd to help catch a crappy pump.
The High pressure pumps have been reliable. Its the crappy low pressure pumps, both the crappy mechanical ones and the recalled electric ones that fail. If that happens when the sled gets around 1/4 tank of gas, the high pressure pump will start to starve for fuel. Fuel pressure goes hay wire and you can cook the motor. The sdi sensors cant detect it or save the motor. It needs that steady 58psi of fuel to work perfect.
[attachment=42514:mysled.jpg]
Other then that. Its an amazing sled that will crush other sleds. And as long as you get these few issues covered, it will give you a good service life. Ive got 10000km on mine and zero issues other then the ones skidoo took care of.