I'm sure this is a dumb newbie question but why on earth would someone want to run propane on a Suzuki? My past experience with NG & LPG is that it just doesn't pack the BTU's of Gasoline.

gas carbs have trouble w/extrerme angles while going up/down severe inclination

Cost of the fuel is less, octane is higher, runs cleaner

Wild

quality, availability,back country dual fuel source,(cooking) some country's don't get clean,consistant gasoline like we do (US).maybe the LPG is more reliable?

Do your cabs/taxis run LPG over there?  Cabs in Australia do and they get twice the engine lifespan (mileage?) of a regular gasoline motor - that was my selling point... not to mention the fact that LPG is half the price of regular gasoline here.  Double win.

If you run straight LPG (not dual fuel) you can easily tune a motor to get the same HP as a gasoline engine, no question.  Sure the power curve is a little different between the two fuels, but it's like comparing a shoe to a boot... there's not much difference unless you spend more time relying on a dyno graph rather than, ummm, driving.  It's not a night and day difference by any measure.
 
My 2 cents.

most people that run proprane, usually have ties to a propane company, so fuel is dirt cheap or free. at least in CT you cant just pull up to a company and say can you fill my tanks in my car or just show up with random tanks, its pretty strict. But i do know that there is no carbon build up fro LP so and engine will easily run more than 3 times longer than a gas engine. most propane delivery and service trucks run on propane

FYI,
All the "Schwann's Trucks" in our area run BOTH the truck and the Refrigeration Unit on LPG !!
( I have a weak spot for "Eskimo Pies")

CAPT

there are a couple of huge advantages to lpg  one is it is a pressurized system so you get constant flow with no pump to worry about failing. Two propane is, if i remember  correct about 120 octane so it loves compression or forced induction that is also the biggest problem aside from availability the reason most people see a power drop is you need lots of advance quick and to reap the the rewards of all that octane you should be over 10 to 1 compression. i have heard of people running as much as 14 to 1 in v8 applications