2009 YZ450F Shorty Exhaust - Curing the disease


No replies to this topic
  • n16ht5

Posted June 17, 2012 - 11:07 PM

#1

Posted ImageSo I had some time and some pipes at my disposal...


Posted Image


Specifically interesting.. the 09 YZ450F shorty. i removed the stock end cap and baffles and replaced it with a PMB end cap spark arrestor with quiet core and ultra quiet tip
Posted Image



Posted Image

used a 29MM socket and a sledge to get the motor side baffle out



back together..


The sound is about the same in volume as stock, but a bit raspier I guess you could say. Still should pass 96db.
Power is much better than stock.
Yes I know... WR450... my friends ride YZ450s, thought I would share the knowledge with you guys since there wasn't much I could find before this
Posted Image







Now time for the stock tip mods
Posted Image




the stock tip has these wierd restrictor things.. I rammed out the motor side, and cut the tip off and put it on the other side for less resistance. Probably about the same resistance to airflow as a spark arrestor and should still pass the stick test
Posted Image

I think i like the look of the stock tip a bit better..
Posted Image


back in she goes
Posted Image



Sound?? about the same in volume as the PMB, although a bit deeper sound. Performance is still light years ahead of stock, about on par with PMB. Not quite as good as the 07 YZ450F pipe, but nice and short for nasty bootleg trails to stay out of harms way. I am tempted to cut off the swiss cheese cone restrictor baffle altogether for a straight shot out the pipe.. but then I would need a spark arrestor (ghetto booty-fabbed one onto my 07 YZ450 pipe)





So for on the cheap (free), you can mod the 09 Pipe for much better power over stock. I think the motor side baffle really hampers performance.

If you want some bling, get the PMB end cap and have a legal spark arrestor too




07 YZ450F pipe with White Bros spark arrestor jammed in
Posted Image

Edited by n16ht5, June 17, 2012 - 11:19 PM.






Related Content

Forums
Photo
Motocross

Thinking about Yamaha 250... by Arctic Pride


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews
Forums
Photo

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride


Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies
Forums
Photo

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.