Welcome to Just Answer.
My name is XXXXX XXXXX I will assist you with your question.
Just seen your question today, sorry I did not see it sooner.
I own two Traxters and really like them.
Bombardier products at our shop and I work on them here.
When I have difficulty with shifting, it's usually because the idle is too high.
On the side of the carburetor, there is an adjustment screw that you can adjust the idle down.
Also make sure that the choke cable isn't sticking and will shut off completely.
The carburetors on these machines were not the greatest for adjustment.
They tend to idle up high when warmed up.
So if you adjust idle correctly when hot, they tend to stall when cold.
I have adjusted mine so it runs best once the engine has run for a few minutes.
Please respond with any questions or comments and I will assist you the best I can.
Thank you kindly,