i have been having a problem recently and I am stumped. I modified my stock setup to a Malossi Multivar w/7.2g rollers, white contra spring, red clutch springs, and Malossi torsion controller. I ended up with great results and performance. Take off was great, it held a solid 8500rpms, and maxed out ~56mph on flat roads.
I then changed to a taller gear set (Stage 6 13/39). At that time the scooter was still running great! A small hit on acceleration with a new, modest, 58-59mph top speed on flats. Then I went back in and swapped in the sliders. I didn't like the results so I made a few other changes including the contra spring and some other slider configurations all with the Stage 6 gears.
I don't remember exactly when it happened but I started getting some serious lag/hesitation when accelerating from a dead stop. The symptoms I experienced was a very anemic acceleration until the scooter reached 15mph. I'm talking about an absolute crawl. Once I hit 15mph the rpms jumped up to 8500rpms and the scooter would accelerate just fine and hit a normal top speed.
At the time I attributed this with my messing around with the roller/slider and contra spring combo so I started to revert back to the step before to see where the problem started. The thing is it's STILL there even though I went all the way back to the stock gears, Malossi Multivar w/7.2g rollers, white contra spring, red clutch springs, and Malissi torsion controller configuration. An interesting characteristic I noticed was that this issue does not happen when I start out for a ride when the scooter is "cold". I put cold in " " because I warm up the scooter but the trans is cold.
In addition to the other issues I noticed that I was having more of an issue installing and removing the variator cover. It seems as though the axle does not what seat in the bearing and takes a little bit of convincing. I am getting frustrated!! If I had to guess it seems like once the transmission warms up something is binding up am creating resistance that the engine can not overcome until the scooter starts moving.
I would really appreciate any suggestions you may have.