Question on pro mx and sx rules

What are the rules regarding the bikes in super cross and motocross? What is regulated?
Is there a minimum/ maximum weight in each class?
How about rwhp is that checked and is there a maximum
Do they run a spec fuel or is that open
Are there any electronics in the top levels, traction control, trick suspension like in the new track cars..those Multimatic units that electronically adjust in milliseconds
I have watched a lot of the races over the years but don’t remember anyone talking about it, figured some of you guys would know.
Thanks
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Mit12
Posts
1994
Joined
6/23/2014
Location
Lake Havasu City, AZ US
12/21/2018 10:45pm
To the best of my knowledge
There is a weight limit
No HP check max or minimum
Fuel is tested
Electronic controll of suspension and traction is not allowed.
-MAVERICK-
Posts
50557
Joined
3/26/2015
Location
Ontario CA
Fantasy
3739th
12/22/2018 3:44am
Minimum Weight
250 Class: 212lbs
450 Class: 220lbs

All you want to know can be found HERE & HERE.
lumpy790
Posts
9279
Joined
9/18/2007
Location
York, SC US
12/22/2018 4:52am
Start with a allocated stock bike and build up from there.

The Shop

12/22/2018 7:10am Edited Date/Time 12/22/2018 7:11am
Bet you know the keys to the race and what makeup to mud is. I've always wished (since bailey) the broadcasts spoke to us like informed fans rather than a family new to the sport. Stop trying to "grow", and speak instead to the true fan.

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drt410
Posts
2075
Joined
3/18/2017
Location
Boston, MA US
12/22/2018 3:59pm Edited Date/Time 12/22/2018 4:03pm
Frame and engine cases must be oem, you can add but not take away so coating the cases and bracing the frame is fine, no hp limit, 250 212lbs 450 220lbs.

The gp stuff youll see cairolli and Herlings have 2 diff frames, the ram air kawi I believe would be legal but you dont see it for brand identity/marketing purposes, the carbon subframe the gp yamahas would be illegal. Besides that you can dlc coat tranny gears, cams, pistons, suspension, add fuel injectors, frame bracing to stiffen but you cant add flex, really still a lot you can do.
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