Dirt bike oil

[fordfanfx4]

It's recommended I use a ester oil in my drz400e. I do all trail and dirt riding what would you guys recommend to use! What are the benefits of using an ester oil. The bike is knocking in it's bottom end and I think it's due to using the wrong oil. I used spectra 4 10w40 which is the recommended weight of oil but everybody I talk to on the drz forum are using a way hevier oil like a 10/50 Full Synthetic ester or 20/50 Full Synthetic ester. I am looking to get rid of the knock or tone it down but I am not so sure on using that heavy of oil. Any recommendations! Thanks for the advice.

 

[Chris142]

Those bikes have a terrible automatic cam chain tensioner. You can buy an aftermarket one that fixes the noise.

http://www.youtube.com/watch?v=FV146sPDrlU

http://www.youtube.com/watch?v=vgudh5ZLZ6U&feature=related

Others have found the nut that holds the counter balancer gear on loose

 

[fordfanfx4]

That's funny you said that. It's sitting apart in my garage right now and the Nut was on tight. And I just ordered the manual tensioner about two hours ago. That's a good call though thanks for the research.

 

[sunruh]

if you want to learn all about the drz400 go here:
http://www.thumpertalk.com/forum/forumdisplay.php?f=25

and pay very very close attention to eddie sisneros

 

[car54]

I run valvoline VR1 synthetic 20w-50 in my DR. works great.

 

[ccdhowell]

I had one of those engines, similar anyway, in a Suzuki quad. The manual cam chain tensioner made all the difference in engine noise. Just use a little common sense when adjusting it, you can drastically shorten chain and cam life by getting it too tight. Though I didn't have my quad too long I found that it wasn't particular on oil, if I remember right I used Delo 15w40 most with fine results.