Recent content by 907nytro

i have the green spring now in my new clutches. it was a stock yamaha spring wound to 90 deg.

i blew my motor in my 2009 supercharged nytro mtx :o| with a little over 200 miles. at 10-12 psi. it burnt a hole in the center cylinder wall. i have a mpi fuel pump, and all the gauges needed. this thing is frustrating me. i just got it back from new clutches. after they exploded. ran it for...

maybe. i hope it was a one time deal. because that hurts the pocket book. it is back together so we will see what happens.

TIGHTEN THE BOLT ON TOP OF THE BYPASS VALVE. OR PUT A STIFER SPRING IN THE BYPASS VALVE.

DRIVE CLUTCH: STM ADJUSTABLE WEIGHTS, AT ABOUT 71 GRAMS. PINK YELLOW PINK SPRING. 15.6 ROLLERS. DRIVEN CLUTCH: GREEN ARCTIC CAT SPRING, 157 PSI. 70 DEG WIND. 39 DEG HELIX.

i run stm weights, stock driven clutch wound tight, 12psi, 8700rpm.

here are pics

i was wondering if anyone has had there secondary cluthe expode. i have a 2009 nytro with a mpi supercharger. my secondary inside sheath broke in half and destroyed both clutches.