Has anyone else had a problem with this allen screw? That could be really bad if it came out!!!1BadZ said:Always check the allen head screw that holds the chain tensioner in the case. I have found them loose on a number of ZX machines. Shell synthetic chaincase oil seems to be good. I've used Castrol synthetic gear oil but it always seemed to go "milky", sorta white and thick. I've used transmission fluid, don't see any problem with it. Only a chain and a couple of gears going round. I tried it after I read an article where some fellow said that was all he ever used. Said if you could take a motorhome and head up the highest hill you could find, in 100 degree heat, towing a boat, and it be OK in the transmission, it should be fine in a little ol' chaincase. Made sense!