I have a D&D 1200 and I can't hold it wide open for very long or I start pulling cords out the side of the belt. I'm at below 500' and tried M8 gearing but that didn't help. We are thinking that I run out of gear right away and I'm pulling the belt all the way down in the driven and its cutting a grove in the belt?? I'm going to try 65/55 (1.90 ratio) and see what that does. Hell...I can spend $199 on belts and I know whats going to happen or spend it on gears and maybe it will help? I put a set of 90gram heavy tip weights in it and I can pull 8K so I know I'm making good power.
OK here is what I am running in my 1200 and absolutley no problem with my 060 belt
BD BLACK BOX AIR KIT
D&D 1200 BB KIT STAGE 2 HI ALT
D&D 1200 BB SINGLE PIPE CERAMI
D&D 1200 BB Y-PIPE CERAMIC
D&D 1200 BB CAN CERAMIC COATED
PRO-LITE POWER VALVE PLUS 1200
BD-X ADJUSTABLE CAM 46/40
XTREME CAM CONVERSION KIT
BD DEFLECTION ADJ LEFT
BD PRO-LITE 56/64 GEAR SET
SLP SKI KIT ORG/ORG
FLYSCREEN
KIT,ICE SCRATCHERS
KOSO WELD ON PROBE FITTING
MMP OFFSET DAGGER 5-5/8
BEARING #6004-2RS
CIRCLIP IDLER WHEEL
BD ROCK PERFORMANCE ROLLERS
SLICK SHIFT BEARING
GASKET, EXHAUST - HEADPIPE
80-90 ADJUSTABLE CAM ARMS
WELD TEMP PROBE FITTINGS 103IN Y PIPE
BOONDOCKER
.
Something is out of alignment I would bet on it