Popping at high RPM's???

2 replies to this topic
  • Baumann

Posted March 12, 2007 - 09:01 PM


Just bought a '06450 and I notice at higher RPM's it will pop or basically sounds like your clapping your hands together, not everytime the piston comes around but often enough to worry me. Keeps accelerating, but I'm thinking it's running out of fuel? My guess is I need to richen the top end up slightly but I was also told to leave the jetting and get a fuel screw and it will usually solve the problems if any. Bottom end is PERFECT no hesitation or any studdering what so ever. Just the top end issues mentioned.
FMF factory4.1 slip on, boyesen quick shot.

Not sure if the previous owner changed the jetting at all. Calling him tomorrow to ask and I'll post up then to give the tuning GURU's some more to go off of.

One more note: Would a loose wire in the stator or any of the wires exiting the stator cause anything? Asking because it looks almost jimmy rigged where the wires leave the stator, and one of the plugs on the cover looks like it was removed unproffessionally (little chewed on).

just trying to cover everything, sorry for the novel.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • 224

Posted March 13, 2007 - 04:26 PM


Jetting is off on the 06 you will have to play with the pilot and main jet to get it beter. They come lean from Japan due to strict emissions leaving Japan .

  • CaptainKnobby

Posted March 13, 2007 - 04:56 PM


I have the same bike and have a DRD full exaust system I run a stock main jet wich is a #165 and #48 pilot which is 1 size up. Jet needle is stock but in the #5 clip position stock is the #4 clip position and the leak jet is stock #55 the fuel screw is turned out 1and1/2 turns. My altitude is 2984ft abouve sea level. I also turned the accelerator timing screw clockwise 1 full turn from stock and it runs great! You might try this set up and see what she does.

Related Content


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

05 yz450f not fast enough by RedeyeYZ

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  38 replies

The "going back to the other darkside" adventure... by Monk

Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 replies

Should I buy this bike? help....... by Numsa Hul

Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 replies

Wilson the Blue Privateer by jetfuel

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 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.