Im trying to work the bugs out of this 98 challenger 1800 I recently bought. I had it on the water today for the 1st time. My L motor occasionally likes to go from 4k rpm to around 6.5. The raves were way overcut in the past...Im not sure why but I havent replaced them yet. Could that be the cause or is there more to look into??? Also my R motor which just had a top end rebuild doesnt want to go much past 4k. I didnt want to push it to hard during the breakin period but was trying to get short bursts in a little beyond 4k. I have been finding info on this site relating to this prob but any additional info would be appreciated. Thx