[Warren_from_PINZ]

I want to add that methanol is very corrosive to copper and bronze as I found out one day when I found water on the outside of my carb. When I went to pull off the WI hose on the bronze/copper? nozzle, it fell off in my hand! The nozzle (vaccum advance input to carb, actually) was corroded so badly it just disintegrated. This took a couple of years but I hardly ever used methanol... just water 95% of the time.

I'd check your throttle butterflies to see what they're made of. In my experience they seem to be bronze a lot of the time.

I've read that ethanol doesn't have that problem but doesn't provide as much power as methanol. Here in New Zealand you're allowed to distill your own booze so I might consider using that as it would be ultra cheap.