I have been a Polaris tech and service manager for 20 years . flat rate has always been 1 hr plus parts. parts would be $50.00 max. should be around $125.00 to $ 150.00. worst case . if it needs anymore than that, the carb would more than likely need replacing.most techs will spend a lot of time trying to repair when they should replace. What was the problem with it to start with. most dealerships would warranty a repair for at least 30 days and some will go 90 days.