..almost killed me, luckily I'm getting good at bad offs and was relatively unharmed; scrapes, bruises, possible breaks(found out later I was fine). Anyhoo I was on a technical rocky rooty trail and towards the end, the trail starts to open before you reach the fire roads, I start to rev it out(07 WR 125 w/pwk) and it gets stuck wide open in third, tried to do the obvious pull clutch and hit kill switch, but I was in a panic as the trail was still only quad wide, and grabbed as much brake as possible and ended up going down on hard pack and some rocks...video to follow. Basically I wanted to find out if there are any surefire locations to look for the culprit(and hopefully some surefire fixes). I have a feeling the outer cable got dragged out of the slot and then got caught. After the bike went down it was just laying there idling as I recoverd before limping on home. At this point I'll surely replace the cable, but am looking for any info/advice at all. Thanks Adam
happened to me a couple of times on a yz250, could be what you described but also could be some dirt in the carb causing the slide to stick open especially if you let go of the throttle and it snapped back but was still wide open. that bike used to do it on and off for a while before i sold it.. bit of a russian roulette machine until i fgured it out
I had the throttle stick on one of my two stroke (green) trail bikes a while ago coming up a short rocky hill. I tried to shut the throttle off at the crest, but no luck and the bike wheelied across the rocks and off the trail a bit, because the trail turned and I couldn't. Did the same thing, grabbed the brakes before I grabbed the clutch, but got stopped and shut the motor off. On mine, it was something in the throttle assembly on the handlebar. Possibly a bit of crud got in there with the cable and held the throttle from closing all the way. I got the throttle unstuck and kept riding. Double checked and lubed the throttle assembly and cable when I got home. Couldn't find anything and it never happened again.
I had to go look to make sure it was not a 2 cable throttle. The 510 is... My guess is a pinched cable under the tank some where. Let us know what you find.
Had a needle in full rich pos on a bike long ago and at full it bound against the needle jet top and held up the slide 83 Husky CR 500 in woods.........would not stop either.....and could no make it stall at WFO. Could that have happened? Had a retainer on a TMX (damn little plastic thing that does not want to come out when U want it too) come out but this is PWK sooooooooo.. Joe
Barkbusters not installed carefully can hold the throttle open. If throttle tube is not trimmed back enough it can drag on the barkbuster end, especially after an earlier crash on the right side. Seen it happen right in front of me on a TE450.
I had a thottle cable that got pinched on my old 250 elsinore. After a full lock left turn at little more than a idle when I turned the handlebars to go straight again it went WOT all on it own. It happened on a goat trail with a shear cliff on one side. It was one of the scariest moments (actually several moments) that I ever had on bike.
Dirt in the slide-comes in from the vent hoses. This is common on most bikes with a standard cable set up. If your carb has never been off for a cleaning, now is a good time. If the throttle cable was moving, but it was still wide-open, then you just need to clean the carb, but a new cable wouldn't hurt anything. This is why there are push-pulls now.
