New problem and I can’t figure it out – Hyosung GV250
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Bike Model = : Hyosung GV250
Okay so I was riding down the freeway doing 85 all of a sudden I lost power bike won’t go over 35 I was 2 exits away from where I was going so I threw on my hazards. I checked hoses those seem to be good I did notice I lost a cam chain tensioner nut the middle one.my cam chain was loose and and It had skipped a couple links so I ended up getting the motor back to how it should be thinking that would fix the problem it did however get ride of the ticking noise but I still can’t get the bike over 30 any ideas as what to check next!???
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You could do a full compression test first (get the readings and let us know what the pistons said) , then carefully take off the cam chains & take apart the valve head.
if i read correctly? you said it skipped the cams ? – So i suspect (guessing) that there is 1 valve that was hit by the piston , even just a smidge , if the valve has, it will show itself when you remove the valve heads off the bike. Tedious process but its the only way to be sure. You can also do leak-down tests (plenty videos on youtube, sorry i couldn’t make a tutorial on the forum just yet)
If we can be sure the whole engine is 100% checked over and you put new head gaskets on , then we move up to the electric side of things but we cross this bridge until the engine is verified first. Valve Clearances do help also.
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Yeah thats what had happened before I got the bike it had skipped timing and the pistons had smashed the valves. I ended up replacing pretty much the whole front motor. But I dont have any tools at the moment so ill have to find some but ill let you know what the readings say after I do it. Idk how long thats gunna take tho.
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