Hi Peeps,I recently got a new clutch for my DTX and found if the clutch was adjusted incorrectly there was a 
strange scraping noise, from what i could gather this is the clutch basket opening out too far and hitting the casing??? 
 
also I put silkolene light gear oil in the gear box before the new clutch and i believe, because its fully synthetic, it 
swells the cork plates causing drag and slip. 
 
when did it last have a clutch and what oil are you using in the gearbox?? 
 
hope I helped a little, James