Motorcycle Repair: tune up, honda cl350, oem honda parts

Question
I HAVE A 1971 HONDA CL350 K3 SCAMBLER WITH ONLY 6800 MILES ON IT I JUST FINISHED RESTORING IT AND A COMPLETE TUNE UP WHICH INCLUDED CARBS REBUILT,POINTS, COILS/CONDENSER .I HAVE INSTALLED FUEL FILTERS. NOW IT RUNS GREAT UP TO ABOUT 5000 RPM AND THEN IT MISSES AND WILL NOT GO ANY FASTER,
I HAVE RESET POINT,S,TIMING,FLOAT LEVELS AND IT CONTINUES TO RUN THE SAME ,I REJETTED THE CARB TO BOOK SPECS WITH OUT AND CHANGE .IF YOU HAVE A SUGGESTION AND COULD EMAIL ME IT JUST MIGHT HELP .
MIKE:  JUNKI1@JUNO .COM  

Answer
Mike, watch the points to see if they are arcing excessively when the bike is running, especially at high rpms.
There is a service bulletin on 350-450s for similar problems when the condenser body is not secured to a clean shiny spot on the frame. If you paint or powdercoat the frame/chassis parts, you have to reestablish the ground path to the battery from all the electrical components.

If by chance you restored your carbs with KEYSTER carb kits, I would put the OEM Honda parts back in, especially the jets and needles. Many of the aftermarket carb kits are not to OEM specifications, unfortunately.

Also make sure that your spark advance unit, behind the points is functioning properly. If sticking or frozen in place your timing will not be correct at various engine speeds.

I will assume that your battery is fully charged and the charging system is functioning properly.

Bill Silver