im new to the 4 stroke crowd so i dont know alot about them yet. last year i purchased a new 07 250r. last week i took it in to have them put an aftermarket fuel screw in and tune the bog out of the carb. when i got it back and started it up the bog was gone but it was idleing high and then low and just not consistent. after about 3 of 4 minutes i noticed the head pipe was glowing hot. which it never did before. is that because its way too lean. do i neet to take it back and have them make it right. my bike doesnt even have 10 hours on it yet.
also i was reading on here that the aftermarket fuel screws can fall out. i have and msr one. should i silicone it also.
i appreciate any help i can get.
thanks