ok well i just changed the oil in my ds650 and my damn clutch is slipping now. and the useless 90$ manual doesnt tell me what kind of oil to put in . so i went and bought some oil with a picture of a quad on it .its 10w40 witch i tought was the right kind. but it cant be with my clutch slipping this much . ,,,,, any toughts

 

I use 10-40 valvoline ATV and have had no problems. It's made for a wet clutch.

 

I run Shell Rotella T synthetic and it's never slipped.

 

i ran some amsoil in mine and noticed it slipping a little

 

thnx guys... i must say im very impressed with this forum. i always get reply's quick, and the reply's always help me .. so thnx alot guys much apriciated (or how ever its spelt)

 

The wieght of the oil is fine. The problem is the type of oil and clutch spring strength to match your DS650 motor mods. Tell me what has been done to increase your performance?

When I had my DS, I was at about 55hp. I ran Honda HP4 10W-40 Semi-Synthetic motor oil. I Also ran Ron Wood Racing 60% stiffer clutch springs. The problem with the DS is that as soon as you give it ANY more horspower, even a higher flowing exhaust, the clutch starts to slip and the mineral oil burns and leaves slick deposits on the clutch. The way around that is to replace the clutch friction plates and change your oil to a semi-synthetic motor oil like HP4 that does not burn on the clutch. Full synthetic is also risky, some of it actually absorbs into the clutch pads and makes them gooey! More slipping there!

 

Ya know that DS is just plain hard on Clutches, cheap money now is replace the springs, with RWR/ ON Dunes/ Barnette the gasket should be OK takes about 1 to 2 housr to do it but your clutch hooks up.