Hi there. I’ve been restoring this 400ex and my last item is to get it running smoother. It runs and drives fine but as you can see its pretty rough idling/stopped.
I was told it has a 440 kit in it but I don’t know that for sure to be true. I do know it has a big gun rev limiter and I put a new DC RCM I muffler on what I believe is the stock header. Carb appears to be stock.
I installed a new plug, changed oil and filter, new air filter, adjusted valves(maybe I screwed that up?). I adjusted the pilot screw 2.5 turns out and this is how it’s running. There may be a little to much oil as the level seem to have gone up after the change which is weird. This could be the source of the smoke, or to rich or bad rings/seats? It isn’t a ton of smoke, not even enough to register on the video i don’t think.
Having a couple of issues with my Polaris. it will crank no problem. After you run it for awhile it will start to run sluggish and back fire and then not have full power. You can let it cooled down and then it will run good until it gets hot again. Second problem is grinding noise from front end. We just changed the L/R cv joints and it is still making noise.
Having a couple of issues with my Polaris. it will crank no problem. After you run it for awhile it will start to run sluggish and back fire and then not have full power. You can let it cooled down and then it will run good until it gets hot again. Second problem is grinding noise from front end. We just changed the L/R cv joints and it is still making noise.
Here are few photos from last weekend’s ride to Knik Glacier. The thing I like most about this ride is the widely varying terrain. The 40-mile, round-trip journey has everything from wide-open spaces to tight trails through the woods, water crossings, sand, mud, rock, hills, everything! I was the sole ATV rider. The others in the group were in side-by-sides.
Here are few photos from last weekend’s ride to Knik Glacier. The thing I like most about this ride is the widely varying terrain. The 40-mile, round-trip journey has everything from wide-open spaces to tight trails through the woods, water crossings, sand, mud, rock, hills, everything! I was the sole ATV rider. The others in the group were in side-by-sides.
A friend wrecked my 2014 Trx 420 2wd into a rock wall. The front tires are spread apart about one inch……..probably just the right if you have the bars even. Nothing is obviously bent but something must be. Before I dig into this is there something you experts would tell me to check if it’s not obvious once torn down?
I’m trying to learn as much of the specifics of clutch tuning that i can and right now i’m researching clutch springs. My question concerns the primary clutch spring. If i increase my starting rate in will increase my engagement rpm but wouldn’t this also affect belt grip since there’s not as much centrifugal force pushing the sheave since some of it got wasted overcoming the higher starting rate? Also, wouldn’t increasing engagement rpm decrease the amount of time it takes the engine to go from idle to shift out rpm? My thinking is the it has say 300 less rpm to travel and you’re making slightly more power to the wheels when the machine starts to move.
I just got my 570 back from being serviced by a dealer. I was looking at the LED readout and noticed they failed to reset maintenance due indicator (wrench).
Came someone explain how this is done? I hate to have to load up the bike and haul it back to the dealer just to get it reset.
I just got my 570 back from being serviced by a dealer. I was looking at the LED readout and noticed they failed to reset maintenance due indicator (wrench).
Came someone explain how this is done? I hate to have to load up the bike and haul it back to the dealer just to get it reset.
