I'm just back from a 7 day trip in the Lac St-Jean area of Quebec. I left from the st-Zenon area, headed east to Quebec city, then north to Lac St-Jean. Spent two days up there touring the lake and the Mont Valin area and then came back down via Latuque. Snow conditions were great. Lot's of snow up there although it's not nearly what they usually get. headed to Mont Laurier area ths weekend provided conditions hold up.
I think that braap-ing the pipes is a good way to let them know you are there. No matter what you have running in your own sled or stuffed in your ears, you will notice an out of place sound that doesn't match the melody of your own sled. I run the dreaded B&B race can on my 670...and I can still hear stock sleds beside me to a distance of upwards ten feet. especially if they blip the throttle a few times. What is comes down to is being attentive and remembering that you just might not be the only sled or group on the trail that day. You can't tell me that a sled doing 30 MPH won't hear another engine suddenly jump up 1000 rpm a few times. Pay attention and nobody gets hurt.
* * * I once heard a story of a group leader on a relatively narrow trail come across a couple sleds flying in the other direction. He put his hand up to signal them to slow down and ended up smacking the lead rider square in the visor because they were moving so fast and passed so close. I guess he slowed right down after that and told the rest of his group to slow down and smarten up. They met up again on the way back and that group was moving alot slower than before.
I usally get behind the rider and hopefully he notices me and if he does pull off to the side and let me pass if not I wait for a nice little stretch and put it to the floor and pass them thats the best way I have used.. because some time you get those dumba**es that dont like to let ya pass and that kind off ticks me off