I like and use Twin Air filters.
Haven't found much difference in oils, I'll use any dino one as long as it's JASO MA spec.
Originally Posted by Adv Grifter
If you want to convert to a 520 system, that's fine. A 520 system gives you more sprocket choices. Good if you ride a lot of dirt and need much lower gearing. Only two drawbacks are that a 520 chain will not last as long as a
525. 2nd is that the 520 does not come in a VM quality chain. But DID do make a V Xring chain which quite good ... but in the end won't match the VM-2 525. So make your choice.
While it is true that a 525 chain will be stronger than a 520 of the same grade, even DID itself sells a 520 chain that will outlast and be stronger than the 525VM2. Check out the 520ZVM-X. Best wearing will be the 525ZVM-X but I also prefer the more commonly available 520s.