Hello again guys not sure if you allow Rieju RS3 125 users asking questions but it's the engine I need advice on. I bought a 2012 model last week with engine issue (I knew that) it was cheap. The thing was the balance Shaft bearings had both disintegrated so I took out engine marked timing on block with piston at top dead. Then split the engine removed all the crap checked for any damage all seemed ok. Put engine back together and got it started ticks over great but when you rev it up it sounds like it's missing around 4k rpm. Could it be a tooth out or could it be a carb issue. It was not running when I bought it but did turn over. Bought off a Young lad with an enthusiastic right hand. Thanks for any help guys really appreciate it.