ninjette.org - View Single Post - EX300 Header inlet size vs. EX250J inlet header size

Yamahawk · November 27th, 2015, 05:30 PM

Cool! Thanks, Somchai! I have a 2012 EX250R header, but those 25.4mm (1") id pipes are pretty small.. I was looking at a EX300 header, and I think I can weld the headpieces to it to make a better performing 2-1 pipe for my 86 EX250E1 track bike. 28.6mm should give the same id as the pregen 250 pipes, and I will gut the cat out of the collector to get better flow. I appreciate the info brother.

Charlie

November 27th, 2015, 05:30 PM	#7
Yamahawk Chaplain Name: Charlie Location: Toledo Join Date: Nov 2015 Motorcycle(s): 75 RD350 race bike, 82 XZ550RJ Vision, 81 XV920RH, 89 VTR250 Interceptor race bike, 06 Concours, 86 EX250E1 Posts: 153	Cool! Thanks, Somchai! I have a 2012 EX250R header, but those 25.4mm (1") id pipes are pretty small.. I was looking at a EX300 header, and I think I can weld the headpieces to it to make a better performing 2-1 pipe for my 86 EX250E1 track bike. 28.6mm should give the same id as the pregen 250 pipes, and I will gut the cat out of the collector to get better flow. I appreciate the info brother. Charlie