'89 VT1100c Minor Oil Leak; Does AT-205 Re-Seal or other brands safe for wet clutch transmission?


  • A small leak began on my stock, 1989 Shadow VT1100c 35K miles. Scotty, youtube mechanic recommends APT AT-205, a polymer sealant oil additive be added with oil change to rejuvenate rubber seals & gaskets as a method to mitigate oil leaks. Given the '87-93 VT1100c engines use a "wet clutch" system, certain synthetic oils aren't recommended as they'll cause clutch slippage. I use Shell Rotella T4 15w-40 and change every 1500 miles. It has worked well, and since changing clutch plates 3 yrs ago, no slippage. My concern is if the Oil re-sealant will work as it should without creating clutch slippage. ie. ATP AT-205, Lucas Oil 10278, and Liqui Moly Motor Oil Saver. These products are designed to condition seals and stop minor oil leaks effectively from inside and avoid costly seal and/or gasket replacement. I can live with the small leakage (I'm talkin' 2 drops, quarter sized, per 2 wks) but am curious if adding sealant to oil is safe and will not create any new issues to deal with. I appreciate any & all comments from experience(s). Thx. j



  • @jkoiwai dont use oil, stop leak crap. unless youre on the road and dont have the ability to address the leak. such a terrible idea. cleaning up the engine after using that stuff is awful. and no they are not meant for common sump engines with a wet clutch. 

    you have an oring on the crankcase plug and it is common for these bikes to have the O-ring go bad on it. its a very likely culprit for your leak. 

     


Please login to reply to this topic!