Pea shooter removal

[Snrub0800]

I got an 09 wr450(if that matters) and I've heard that u should remove the pea shooter in the exhaust and I don't know how. Yes I've gone to faqs and gone to there free mods stuff but I couldn't find the instructions to do so. Someone wanna tell me how?

[agave248]

Are you talking about the spark baffle?

[Snrub0800]

I've also heard it called the exhaust baffle so I'm sure it's all the same

[jimmym]

There's a ton of information on pulling out the pea shooter. Check out the stickies at the top of this forum, or start with this thread;  https://www.thumpertalk.com/topic/372037-wr400426450-faqs/ 

[GuyGraham]

Yes, you need to remove the pea shooter

 

You want the pipe to be as big as poss

 

I mad emy own by following this

 

https://www.thumpertalk.com/topic/291590-modified-stock-pipe-saves-big/?p=5427605

[Snrub0800]

This is where I'm at so far. What next?

[yamahadude93]

Put a condom on it hahaha

[Snrub0800]

Lololol!

[yamahadude93]

Unscrew those Allen heads, and replace the outer cap.

[Snrub0800]

And put the cap back on?

[SteveThe Snakes]

📎ImageUploadedByThumper Talk1423517624.696143.jpg

And put the cap back on?

If all else fails the YZ450 pipes bolt on and work real real with the pro Moto billet end cap.

[Snrub0800]

Oh great, but what am I supposed to do now?

[SteveThe Snakes]

It has been a while since I have seen a stock WR pipe. But I believe you remove the pea shooter baffle which is the smallest pipe on the inside then put it back together.

[SteveThe Snakes]

Update from this thread:https://www.thumpertalk.com/topic/775156-2008-yz450f-exhaust-on-a-08-wr-450/

 

I know there are pictures here that show you, but I cannot remember which thread it was. It shouldnt be too hard to find it.

The pea shooter is the inner baffel (about 5/8" diameter) that is enclosed in the outer baffel (about 1") on the tailpipe. You can take the end cap off to reveal the 5 or 6 bolts that hold the baffel onto the silencer. Then you can simply drill out the rivet on each side that holds the inner baffel to the outer. After you drill out the rivets you must remove the inner baffel. It will take a little carefull effert to remove it as it is pressed in I believe. Be careful to not bend or damage the mounting plate of the baffel as it is thin. It does open up the pipe a little and let it flow better.

 

Remember GOGGLE is your friend.

Edited February 10, 2015 by stevethe

[Snrub0800]

Thankyou very much, I have gotten out that inner baffle so I'll just reassemble the whole deal.

[SilvFx]

Sounds like you removed the restrictive pea shooter from within the pipe and are reassembling, so you might be just fine.  For your reference, here is the Yamaha GYTR replacement end piece that already has all the restrictions (pea shooter) removed and you attach using the four allen head screws you removed. Reuse the existing stainless steel gasket when you put it on and put the end cover back on.  As you can tell some people just eliminate the entire piece and put the end cover back on (which works but doesn't look as clean). 

 

http://www.stadiumyamaha.com/oemcatalogs/p/yamaha_motorcycle_off_road_2009_wr450f/yamaha_accessories-performance/4ff9e7d7f870021c947d6266/quiet-gytr-performance-wr-muffler-insert

 

Hopefully you did not remove the spark arrestor screen.