hi. my 89 rc seems to be getting sluggish when i try to get it revved up. by sluggish i mean, when i step on it, it seems like it has no balls anymore. it used to happen before but that was mostly old gas. im thinking it might be timing or the timing chain but it only seems to happen when i stomp it in 2nd (which usually revs up pretty good). its a 318tbi 2wd. thanks in advance.