well you could do a few different things here. you dont nesecarlly need to tear it down just yet if you got like 105 in both cylinders i wouldnt be afraid to runn it till ur ready for a rebuild. but on the other hand if you were to tear it down now you will probably be able to get away with just rings. and you dont have to rip the whole motor apart and bore it and all that extra shit b/c of slightly low compression. when ur ready for a rebuild check to make sure the crank has no play if none then dont bother with it. if the cylinder doesnt have any gouges or scuffs you can leave that be also. b/c there is no reason to bore a good sleeve unless you like to waste money and lessen the life of ur parts for no noticeable gain. now with ur bog if you took the lid off and ur coming back with good plugs run it that way. i might be wrong but i think the jets fmf sends with the pipes are to be run without the lid anyways