14 MPI Viper RPM and Top speed

[twyztid]

I am having kind of the opposite with my 15 MPI turbo w/ Supertips weights & STM roller secondary. Started out with the clutching STM had setup on their dyno when the MPI trail can was installed and was not hitting limiter. I installed 14.8mm Thunder rollers in the primary and a modified MPI trail can (straight through) and was hitting rev limiter almost at will. The roller secondary had a 54/38 helix. I changed the helix to a 46/40 and added 3 grams to the tip of each weight (had nothing in the tip before... 72 grams total now) and I still hit the limiter pretty easily and had a peak RPM of about 9350. I think I am going to remove the 3 washers and from each tip and put in a 7-gram tungsten washer for the next ride and see what happens. It's a long process because we don't have enough snow to test at home and I am not really in the position to change the clutching while on a trip.

 

[WootTootViper]

I finally said screw it and I’m leaving it at a shop up in Wisconsin for a week to get a full tune up and get the clutching taken care of. We don’t have snow where I’m at.