Dr D on 2006 YZ450F

5 replies to this topic
  • Aaron6624

Posted July 06, 2006 - 04:05 PM


Looking for some help. Just installed a Dr D complete system on my 2006 YZ450f. Has caused the bike to lose bottom end power altogether and seems to run much hotter.
Has anyone had a similar experience or ideas on what the problem may be?

  • Ga426owner

Posted July 06, 2006 - 04:31 PM


What was the doctors jetting spec for this pipe? On some pipes you will lose some bottom for more gain on top.....is this the characteristic on this particular pipe?

  • Thumparoobonzai

Posted July 06, 2006 - 05:49 PM


Sounds like it needs more fuel. Check with Dr. D.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • jwcrf05

Posted July 06, 2006 - 06:42 PM


i don't know where you are but i run a 165 with a 48 pilot and the stock needle in 3rd posistion with my dr.d and the thing has a ton more bottom than the stock pipe. now that its hotter i might go back to a 45 on the pilot.

  • grayracer513

Posted July 06, 2006 - 09:51 PM


That was not my experience with the Dr.D complete system at all. We had already rejetted to a 165 main and a 45 pilot, needle in #4, and ours responded very well to the pipe. The low and middle felt noticeably snappier than stock.

Dubach makes no specific jet change recommendations other than for the '03's, I believe, and there he only specifies moving the needle to 4. Otherwise, it should perform with the same set up that ran well with the stock system. Yours may have been borderline.

  • Aaron6624

Posted July 08, 2006 - 06:47 PM


Rejetted the pilot to a #45, kept main jet as a 165, added a boyzen quick shot and the bike is running stronger than ever.
Thanks for the advise.

Related Content


Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

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

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Is it worth it? (Cam and High compression piston) by macgi77

Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies

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.