I have had 2 contacts this year from guys who I have done carbs for that ended up bringing the carbs to their local mechanic because they couldn't get the carbs to run right. In each case, the local mechanic determined that I had installed improperly sized main jets. The repair was to upsize the main jet and charge the owner a bunch of money. In one case the owner contacted me while the bike was still in the shop, and the mechanic refused to speak with me (so I could explain the need for the 2 minute mod foam) and I could hear him screaming in the background that I'm an idiot and wrecked the carbs.
So PLEASE, if I do your carbs - understand that the foam blockage is INTEGRAL and NECESSARY to the performance of the carbs. you cannot leave the block out and expect the carbs to function. the air / fuel ratio of intake opening and jetting has been carefully developed on a dyno and using a WBO2 sensor. The jetting in the carbs is correct; follow the instructions and you'll be impressed!
Also remember that your mechanic has never seen this type of jetting before, so if you bring him your poorly running bike, no foam in the intake, or expect HIM to read the instructions I sent, you're going to be in for one expensive lesson.
I'm not sure why this has happened 2x this year, I haven't heard this complaint in some time. Of course I have provided many you tube video's on airbox repair, tuning, syncing, etc. I also do product support and I care about each person's success with my products. I don't know why these guys chose not to contact me when they first had issues, but that's beyond my control.
Please, I know as men we don't need instructions or to read directions (I'm as bad as anyone) . And don't expect your mechanic to read the directions... he's a man too. But if it looks like it's going to cost you extra money, maybe that's the time to read the directions. The money you save will be your own
Steve