Jersey screen printing

It's typically done with sublimation these days, but some people still use HTV.

If you really want to use screen printing though, you can make up the design yourself, and there are companies online that will make the screen for you so you can print as many as you'd like.

Your best bet would just be to use an online search engine though, and you can browse your options. There's a website called Google that works alright for that kind of thing.

That's:

www.google.com

The pro stuff is primarily full custom sublimation or digitally printed. I’ve had Bikegraphix do a bunch for me and the quality is excellent. 
 

Printing jerseys for a team is a great way to show team spirit and support your sponsors.Many small businesses offer screen printing services for jerseys and other apparel. Silk screen printing is a popular method for printing on fabric, as it can produce high-quality results with bold, vibrant colors. If you're interested in silk screen printing, you might want to check out local print shops or online retailers that specialize in this type of printing. It's always a good idea to get quotes from a few different companies to make sure you're getting the best deal.

Hit up Somnium Racing,

Great local motocross company in Salt Lake City.

Started a privateer supercross team to help riders.

 Great up and coming company quickly.

https://www.somniumracing.com/

Digital printed heat transfers will work better than screen printing on MX jerseys.  Gear brands like THOR  , build the jerseys from scratch for the team riders and sublimate the logos while printing the designs on the jerseys.  Sublimation only really works on new white polyester and very light colors. So sublimation on a jersey after the designs are sublimated  and the shirt is sewn together is more difficult and limited. Heat transfers made with the materials that are made for going onto sublimated polyester have a layer in the transfer material to block and dye that tries to bleed through the transfer.  If you look at the older Pro jerseys for the early 2000s . You'll see the jersey design bleeds through on many of the shirts. But now the companies making the Heat transfer vinyl or HTV have all developed their own blocking type of materials . 

Sublimation transfers the design from a special paper  into the fabric using heat and pressure. Around 400 degrees for about 1 minute or so . and the heat turns the ink into a gas that dyes the fabric. The pressure helps the design stay local and transfer sharper. If you reheat the jersey the inks can start to return to their gas state and you can suck some of the color out of the fabric if it has a path to go and substrate to absorb it.  The HTV has dye blocker so the reactivated inks will not bleed through the transfer.  Pressing the transfer on is normally a very short 10-15 second press. And even without the blocker you can press without getting bleed . But then as you wash the jersey and it gets hot in the washer and drier, you can get some bleeding. Screen printing on polyester that has been sublimated would probable get bleed through and is often thicker than the HTV transfers. 

I'm sure its just a lack of knowing what the terms are for the lettering. And not really somebody wanting to screen print onto a jersey. If you wanted to Do it your self, You could find one of the many MX graphics companies that offer jersey lettering and ask if they can send just the transfers. You would need a heat press. The cheap China presses are not worth trying. You will have issues with the transfers sticking , and or over heating. The Cricut heat press that can be bought at Walmart and craft stores would work good enough to do your own jerseys a few times each year. And they are around $200 or so I think. Too small for doing the back in one shot. But for adding logos it would work . Buying a decent brand name press would be a must if you wanted to do it as a full time thing. So most people are better off shipping their shirts or buying them from a shop that letters them.

An Iron will not get hot enough or provide enough pressure for the HTV to stick properly. Although there are some HTV's that can be Ironed on. Just make sure you find a place offering transfers that CAN be Ironed on. And double check with the seller before buying. I think that I saw an iron on logo kit in one of my distributors catalogs that was still offered. So you might check with your local dealer too. 

Factory effex offers this kit that can be ironed on and is made for MX jerseys. They say they will not bleed. I have never tried these. We make our own digitally printed transfers.