Hello and welcome, 
I don't know for your question but pretty sure it does not fit. 
You have a solution here:
www.enduroklassiker.at/en/engine-parts/435...

Manu

The intake pipe for model 502 is no longer manufactured, will I have to have it custom made?

Do you think it's compatible 503 30 050 200 with 502.30.050.000, seen when I contacted the manufacturer, Ktm replied not compatible Thank you for my understanding,

Pour quelle machine est-ce destiné?

Sorry, i misunderstood.. I thought you were thinking about replacing a 542 pipe with a 502... But try to have a clear question if you expect a clear answer  🙂

What is your motor's serial number, for what motorbike and year? 

Kind regards, 

Big wallet?  :/

www.ebay.com/itm/185207236778

Hello again, yes I expressed myself incorrectly, is this compatible 542 on the model 502 Ktm gs 1995 125?

Alors c'est bien celle la que je cherche pour model 502 de 87 a 97 mais pour le prix en occasion je peut la faire sur mesure en alu raccord en caoutchouc

Try to contact directly Andre Horwath (enduro klassiker,  www.enduroklassiker.at/en/content/6-contac... ) to see if something can fit your bike. He is very helpful. 

www.enduroklassiker.at/en/suche?search_que...