Re: kasea 90
Your one friend is correct, a 2 stroke need to be opened up now and then however this is not your problem. Your Dealer did not set up the quad and jet it for your altitude with the restrictors. You are simply running fat. This means you are heavey on the oil mixture. If you want the restrictors left in place you will need to adjust the needle in the carb.
Curent factory postition is in the middle of 5 settings, you will need to raise your clip on the needle which lowers the needle which leans out the mix. Also I would find out just what oil the dealer used. Some dealers that do not know any better will use the absolute cheapest injector oil on the market!!!
Use NKG B-8HS plugs the stock plugs are trash. Hope this helps.