Pro Moto Billet Silent Insert



27 replies to this topic
  • MortgageRider

Posted March 08, 2005 - 04:59 PM

#21

timcook,

The interior baffles do not get removed, only the end pipe. The advantage is a bigger diamiter(sp) end pipe from the spark arrestor to the end cap. I got my YZ pipe from my brother-in-law he replaced with after market. Check ebay or post in the YZ forum for someone doing the same.

Brett

  • black_n_blue_thumper

Posted March 08, 2005 - 08:42 PM

#22

Thanks Rick, I am starting to understand now.

  • Jackazz

Posted March 09, 2005 - 07:44 AM

#23

...I still am not sure what the YZ pipe cost. Has anyone purchased one lately? If so cost? Performance gains????


If you need a spark arrestor and/or need to meet db restrictions, I'd get the PMB insert for the stock can, because:

Stock YZ can (no SA, loud) ~ $75-$100 depending on year & condition.
PMB end cap with SA ~ $125
PMB "silent" insert ~ $40

or:

PMB insert for '98-'04 WR ~ $40
PMB insert for '05 WR ~ $60


Now, having said all that, the areas I ride, db & SA requirements are not a problem, so I run a stock YZ canister with no modifications. The increase in power is noticable across the board & it has a nice bark to it without being rediculously loud. I paid $85 shipped for it on e-bay. :)

  • Rooster426

Posted March 09, 2005 - 09:52 AM

#24

I just put the FMF "Q" pipe on. Before I was running the stock exhuast, with the silent insert. Basically I should've stuck with the insert $40 vs $255(had hookup for the Q). I can barely notice any significant difference. The sound is virtually identical, FMF maybe slightly quieter. But $40 vs. $300+ do the math....

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  • Dan_Lorenze

Posted March 09, 2005 - 10:43 AM

#25

I just put the FMF "Q" pipe on. Before I was running the stock exhuast, with the silent insert. Basically I should've stuck with the insert $40 vs $255(had hookup for the Q). I can barely notice any significant difference. The sound is virtually identical, FMF maybe slightly quieter. But $40 vs. $300+ do the math....


That's because the stock 01 WR426 exhaust is actually pretty nice, free flowing design with no odd baffles or tubes. Much nicer than the stock 05 exhaust.

  • jwriott

Posted March 09, 2005 - 10:52 AM

#26

Rooster426, have you rejetted when you switched to the FMF Q? I had the same setup and initially ran the stock can wide open. Then I bought the GYRT insert which is a total POS and then the PMB insert. The PMB was better than the GYRT but the bike still ran hot.

I then bought an FMF Q and had to rejet which gave the bike more power. Basically back to the same jetting I ran with the open stock exhaust. I had to lean the bike out to run either the GYRT or the PMB.

  • Rooster426

Posted March 09, 2005 - 11:21 AM

#27

I havn't re-jetted yet, I was curious to see if I would have too, bike seems to run great. Actually when I would run the stock with no insert, I would get a lot of backfire when I let off the throttle. The bike seems to like having more backpressure.

  • jwriott

Posted March 09, 2005 - 11:51 AM

#28

I havn't re-jetted yet, I was curious to see if I would have too, bike seems to run great. Actually when I would run the stock with no insert, I would get a lot of backfire when I let off the throttle. The bike seems to like having more backpressure.


I'd say you needed to richen up the jetting to compliment the greater airflow.




 
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