Loctite is a necessary evil. however if you don't want to deal with Loctite and if your bolts are through bolts which have nuts and washers with them you may consider using a finer thread bolt with a nylon lock nut and a lock washer. While they suck to put on and take off however they will not likely back off from vibration unless you remove them too much and wear out the nut . you can also get them in 316 stainless steel but if you do, use a little anti-seize to prevent from the nut from becoming a permanently seized to the bolt.
Also as with any bike especially a bike with a motor that adds vibrations to the bike always check every fastener frequently as part of a preflight inspection.
when I was young my brother not only didn't do this he left off the safety tabs on his front wheel and didn't find out until he pulled a wheelie that his front axle nuts had came loose. that was so funny he was screaming the whole time trying to ride the longest wheelie of his life with no front wheel. of course he was my older brother that picked on me often so that made it even better.
Here is a link to the type of Lock nut that I am talking about.
https://www.boltdepot.com/Hex_lock_nuts_nylon_insert_Stainless_steel_316.aspx
here is more information on this type of fastener including torque specs
http://www.nylok.com/nylok-basics
if you have threads in your motor and have to use a normal flange bolt just make sure the threads on the bolt and motor are clean and use a quality bolt of the correct length and thread, make sure to use a good quality lock washer with a bolt that has a flange that will engage the lock washer properly if possible . and always use a torque wrench to tighten the bolts obtaining the specs from the motor manufacture. if you must use Loctite you can remove using heat from a source like a pin point pocket torch but remove this way may alter the temper of the bolt requiring replacement as the bolt may become too brittle.
Example of the Flange bolt that I am mentioning
http://www.ap-magazine.com/fastener-product/Detail_95941_Metric-Hex-Flange-Bolt-.html