Join Date: Feb 2009
Thanked 5 Times in 5 Posts
Sled: Z1TurboLXR LE,& 400hp Z1Turbo ext
10-11 Mileage: 3750
09-10 Mileage: 2667
08-09 Mileage: 2580
07-08 Mileage: 2600
06-07 Mileage: 3200
I am going to take a not so wild guess that you have not done the strongly recommended 5000 mile valve clearance inspection. This inspection would most likely be done twice before you should need to change the plugs, unless you routinely start the sled without it getting a chance to warm up. The procedure to get to the plugs is the same to get to the valves.
This is a 4-stroke and don't need to change the plugs as often as a 2-stroke. That said, my last two 2-strokes didn't get a plug change until 11,000 miles. I only changed the plugs because they had 11,000 miles. I did not notice any different power or MPG afterwards.
I just did the valves on the wife's '07 Z1 that has 5204 miles! I had one exhaust valve that was in the danger zone. The valve was tight to the point I believe it was at a negative .033mm. This means the valve was unable to fully close. I caught it in time and don't believe any seat or valve damage was done because this sled runs strong, smokes my turbo up to 75mph.
But to answer your question, you need to remove your seat, console, all the plastic body panels, tank bracket, steering column, tank, airbox (real fun reinstalling this, NOT) camshaft positioner sensor, and the coils on top of the plugs.
If you read your manual, it tells you that if the plugs need to be changed, take it to your dealer! Good Luck!
PS sorry, no easy way