Polaris, no reed valve??? Trailblazer 250
#1
Polaris, no reed valve??? Trailblazer 250
Ok, I've worked on dirt bikes and atv's most of my life. I rebuilt a-many motors and never seen this. All the 2 strokes I've worked on had reed valves. I have even seen rotorary/port injected 2 strokes but never just the carb going into the cylinder the way the polaris does. I thought there was something wrong with it and maybe someone was messing around. I looked the polaris parts up on a parts fiche and there is no reed valve installed. This quad just had the top end rebuilt and starts great now but bogs out on the top end bad. The carb is cleaned and it is getting plenty of gas. What could be wrong?
Thanks for your help,
Otto
Thanks for your help,
Otto
#2
Otto, the 250 is a piston port engine,one of the first 2-stroke designs invented. Long before the rotary valve and reed valve came along, the little put-put piston port has been chugging along! There are fellas on this forum that can help you get a little more out of it,BUT dont expect a fire breathing monster! As far as bogging out on top end you can start by raising and lowering the carb needle a couple positions and see if it helps either way. Also see if it runs better at top end with the choke pulled out a tad,if does then upping main jet may help. Good luck OPT
#3
#4
Quad Patrol
Don't let the hp numbers fool you. Its all in how you get it to the ground. Clutching clutching clutching!
Don't let the hp numbers fool you. Its all in how you get it to the ground. Clutching clutching clutching!
#5
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