it doesnt use trans fluid but that doesnt mean the seal is 100%. i have read the thread on crank seals and the leakdown tests........the seals that seem good but are not but heres the issue with that............. suppose you change the seals and they are 100%..... but after a few weeks/months/what ever they no longer pass these tests again but the bike still runs decent. you trying to tell me that your goign to change those seals at every instance that you feel the seal is not right? its all good in theory but thats not always real world feasible. this bike prob hasnt had crank seals replaced in at least 5-6 years if ever. ill update what i find as i have time to work on it.