General Category > General Discussion
2020 V85TT Rear Transmission Leaking
timonbik:
Recently completed a 1000 mile trip on my 2020 V85TT with 53,000km on the clock. Rode 500 miles to my destination and upon arrival there was no sign of any leaking. Bike sat overnight and in the morning I observed a small dribble of gear lube on the rear rim. it was leaking from the space between the rear wheel and the bevel drive. Rode around town a bit and there was minimal leakage but it was still leaking. Hit the road to travel home and it appeared to be good after an hour but after 2 hours it was definitely leaking again. At about 250 miles the wheel was oil soaked. I know the drive was not overfilled as I personally filled it myself and used a syringe to add the requisite 160ml of gear lube and the bike had travelled in excess of 15,000 in on that fill with no sign of leakage until this trip. The parts diagram shows multiple seals, o rings and gaskets internally. Any suggestion as to where to look first. It is NOT leaking from the pinion/input seal.
Thanks, Tim
guzzisteve:
There is a thread on here just recently about same thing, only adding 130cc, look around you'll see it
Here---------------
https://wildguzzi.com/forum/index.php?topic=125639.0
timonbik:
If one follows Guzzi's line of thinking why put any lube in at all that way there would be no chance of leakage. The designers/engineers originally called for 180 ml, then it was reduced to 160 now 130. Something's rotten in Denmark me thinks
yrunvs:
--- Quote from: timonbik on August 12, 2026, 06:36:01 PM ---If one follows Guzzi's line of thinking why put any lube in at all that way there would be no chance of leakage. The designers/engineers originally called for 180 ml, then it was reduced to 160 now 130. Something's rotten in Denmark me thinks
--- End quote ---
It is a little bit of a mystery as to the correct amount of oil for the pre E5+ model v85tt's. The E5+ manual states to refill with 130cc but I can find nowhere this amount for the E5 everything I find states 160cc's is the revised amount from180cc. There is a possibility that the final drives are different in some way???
Dr. Enzo Toma:
I suspect that there could just be more "residual" left over after draining a unit that was filled to 180cc when assembled.
I had a similar issue with my V7 850 and for mine. Filled to 160cc, it leaked from the spot you describe. Filled to 130cc, no leak. Knock on wood.
https://wildguzzi.com/forum/index.php?topic=123836.0
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