Modifications to a car, pick - up truck, van, motorcycle, or moped can affect its registration class. Important : The DMV cannot examine your vehicle to determine the correct registration class. You must determine the correct registration class for your vehicle. 

Modifications to a motorcycle or moped, including Limited Use Motorcycles- 
If you remove a speed governor that was originally installed to limit the top speed of a moped or add a speed governor that limits the top speed of a moped or motorcycle , you must notify DMV and register the moped or motorcycle in the appropriate class [1]. 

Modifications to cars, pick-up trucks, and vans 
Part 106 of DMV Regulations describes the vehicles that are registered in the' Commercial' class and in the passenger class. Part 106 also describes how some modifications that you make to your vehicle can affect the correct registration class of your vehicle. A description of the modifications appears below. Each description includes a reference to the DMV Regulations [2]. For all vehicle modifications , you must obtain a vehicle weight slip. You can get vehicle weight slips at most vehicle and/or metal scrapyards and from some auto - parts stores and mechanics, especially those specializing in vehicle modifications and camper body / equipment sales and installation. 

Modifications that change a registration from 'Passenger' class to 'Commercial' class 


Cars (Part 106.2 (e)) 
You can register a car in the' Commercial' class if all the seats behind the driver are removed. Instead of the seats , you must install a permanent box or permanent rack to carry cargo. 

Station Wagons and Vans (Part 106.2 (f)) 
You can register a station wagon in the' Commercial' class if all the seats and all the seat fittings behind the driver are removed completely. 

Modifications that change a registration from 'Commercial' class to 'Passenger' class 


Pick-up Trucks (Part 106.6 (b) and (c)) 
You can register a pick - up in the' Passenger' cla

user: Hello. I recently made some modifications to my vehicle, and would like to know if those have changed its class. It is registered as commercial.

assistant: Is your vehicle a Pick-up Truck?

user: That's right. A beautiful Pick-up.

assistant: Good. If your vehicle meet some requirements, based on its unladen weight, then you can register it as a "Passenger" class.

assistant: Do your vehicle's unladen weight is less then 6.001 lbs?

user: That would be a yes. It weights 5.765 lbs.

assistant: Excellent. That would be one of the criteria used, being the other ones the following: Vehicle doesn't have any business advertisements; and the truck is exclusively for non- commercial purposes at all.

user: That applies for those trucks that go over 6.000 lbs? I guess not, right?

assistant: You guessed right. For those, aside the non-commercial use, must meet the following: A camper top, with one or more side windows completely encloses the truck bed and having seats, seat fittings or camping equipment installed in the truck bed.

user: Good. Where can i see differences between classes?

assistant: You can refer to DMV Regulations and specifically on Part 106 of such rules. 

user: I'll be able to find what kind of modification made possible that my vehicle be one or another class?

assistant: That's correct. Part 106 describes how your modifications affect your vehicle's class.

user: What if i have a van instead?

assistant: For those, vehicle must have at least one side window behind the drive and at least one seat or seat fitting.