Go for it man! Issues you might run into are the weight differences between yourself and your belayer and the strength of your gear/rock.
In a sport climbing situation with good bolts, gear is not going to be an issue. If your belayer weighs significantly less than you, there are few options: 1) You could tether them to a bolt or natural feature with one end of the climbing rope or a sling. Keep in mind that this might slam your belayer into the rock in an uncomfortable or dangerous way (get them to use a grigri) and will increase the length of your fall. or 2) you could invest in a specialized device like the ?edelrid ohm?.
Top roping probably won?t be an issue. Tethering off the belayer should cut it.
Trad climbing could pose some interesting issues. If you get a belayer that weighs up around the 140kg mark you will save a lot of time but the elderid ohm might do the trick here as well. To secure the balayer if they are significantly lighter than you and you plan on leading, you could get them to belay you from well below the belay anchor (assuming a multi-pitch/tethered into the rope) and/or anchor them into the wall with pieces that can take a serious upward pull. Belaying with a grigri here probably isn?t a good idea because it will increase forces on the overall system in the event of a fall and you will be wanting to reduce forces where possible.
An awareness of the sort of forces you might clock up on falls of different severity is going to be of benefit in guiding the sorts of gear you place in certain situations should you be in a position to choose (sometimes its just a matter of placing what you can then climbing to better ground). Some gear that skinnier climbers might recommend based on the fact it took a fall for them doesn't mean it is going to take a fall for you. You could find an online fall factor calculator, punch in your details (weight, elongation of the rope you intend to use, etc.) and give yourself an idea of the forces that will be involved on the upper piece of protection that you might fall on. Fall factor calculators are not perfect (you can try http://junkfunnel.com/fallforce/) but they are better than nothing and live human testing of factor 1 falls done by an australian company called the rope lab seemed to indicate that they are in the ball park http://www.ropelab.com.au/members-human-drop-tests/ . There are means to calculate the forces yourself if you are into formulas and can be bothered dredging the net for them.
At around 150kg (you and gear) a small fall (FF 0.25) might clock up something like 6kn on your top piece. I would avoid small micro nuts. Any well placed cam in the C4 range and most in the X4 range will do the trick in good rock.
A big fall (FF 0.5) might come in around 7.5kn. This would rule out most micro nuts but as above most normal gear should be fine.
A very scary fall (FF 1) might be up around 10kn. Small cams (x4s/friends) and micro nuts might not do the job.
NIghtmare fall (FF 2) just don?t fall. A big cam or nut, or better yet, a collection og them might do the trick.
All of the forces encounted on these pieces can be reduced by placing single use only gear like a yates screamer and apparently its possible to buy reusable force reducing gear as well (Kong kisa) but I have never tried it out. Forces can also be cut by a good belayer.
A good chunk of the fun with trad is risk management. Take a course, climb with experienced climbers, learn what you can. It is not 100% safe for anyone and exclusions based on someone being heavy per se doesn?t make much sense to me. A good deal can go wrong for the skinniest climber out there if their gear, placements, rock quality is rubbish.
