I figured that much. Isn't that something the shop would know about? And I was wrong on the brand they are Ride It shorty levers not Rizomo. Where would I find the adjustment for the plunger?
Do they sell levers? A pretty easy upsell... and then they still have the "wrong" take off to fix some crashed bike....
Which Monster do you have? Depending on the model, the adjuster might be slightly different. The Ride It website does not show pictures of the appropriate part of the lever... pictures would definitely help here.
They took the clutch cover off and found out that my clutch was not fully disengaging when the lever was in its nuetral position and that my clutch lever may not have been machined correctly and was causing fluid to back up in the clutch system.
This description is a little less than accurate, so if that is what they told you I'd find another shop. The fluid isn't "backing up," it is doing what it is supposed to do... transfer energy from the lever to the clutch actuator rod through the hydraulic system that is the master/slave/hose arrangement. If your lever is not adjusted properly it will hold the master cylinder in a "squeezed" or partially squeezed position... and hold the clutch in the disengaged or partially disengaged position.
If it didn't do it before, and now it does, then they adjusted it out of spec (through lack of knowledge or to bump up their profit margin) or otherwise boogered it.