There is a seal where the clutch actuator is.Very easy to replace.Sounds to me like you need to split or semi split the cases and use some "liquid gasket 1194" to reseal the cases together.there is no gasket inbetween the cases and requires what I said above or equivelant.Do not use silicone or any other type of sealer than what is reccomended.The stock phillips bolts are no good.What I like to refer to as "butter bolts". Snyder motorsports sells a nice complete stainless allen head bolt kit for the blaster for about $30.Well worth the investment and you can actually get the correct torque specs with them unlike the phillips bolts.A complete seal kit is fairly cheap and worth it to change them out while it is apart.Blaster motors are relatively easy to work on and if you are mechanically inclined than it should be no problem for you.I can provide some pics and knowledge to help you out if need be,just let me know by sending a private message.Hope this helps.