Notchy shifting after oil change

1 reply to this topic
  • BASSic

Posted February 17, 2008 - 04:36 PM


My 01 yz426 has lived its entire life with Mobil1 15w-50 red cap. The guy I bought it from used it exclusively since new and gave me an unopened 5 qt jug when I bought the bike from him. I used up all the red cap oil and when I just did my oil change yesterday I used the 15w-50 currently available at WalMart (with a regular silver cap).

Since that oil change, my shifting is very notching. It was never buttery smooth, but it's very rough and notchy now. Shifting with or without the clutch doesn't make much of a difference.

I don't want to start another oil debate, but is there anything wrong with the current 15w-50 from Mobil1 or any reason it would cause notchy shifting?

I'm considering the dino Rotella 15w-40 because it's dirt cheap and I've heard good things about it. I've been changing the oil every other ride, so I'm not too concerned about it breaking down sooner than synthetic.

I have a friend who can get me Amsoil MCF 10w-40, so I may try that too (despite the high price tag) and see what works best for my poor gearbox .

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

Posted February 18, 2008 - 04:21 AM


I am using the Amsoil oil in my 00 426. I noticed smoother shifting using that oil as soon I switched to it. I was using Belray Thumper prior to the Amsoil. I have never used the Mobil, so I have no way to compare it. I am happy with the Amsoil, however.

Related Content


Michigan Motocross Tires by 288yz450

Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply

Need help by Goforaride

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  68 replies

Is the 2016 GYTR Yamaha YZ450F too fast? by Fryboy

Dirt Bike   Special Interest Forums   Pro Racing
  • * - - - -
  • Hot  241 replies
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

yz400f throttle bog by yz400fmaniac

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • * * * * *
  • Hot  28 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.