I ripped the moby apart for several reasons and installed a Mikuni Vm18 and an ER3 variator. I wanted to first tune the carb on stock variator, but that variator is a pain to take off, so I installed the ER3 while I had the motor on the bench.
I'm running the airsal 74CC Kit.
I got the moped to idle on the Minkuni, and started to tune the ER3.
I started with very light weights and worked my way up. Maybe I didn't work my way up slowly enough. When it was super light, I was going nowhere the moped was loud as hell and I was barely moving. I ended up at the heaviest possible, with still terrible performance. With the heaviest weights, it won't even full variate on the stand. Once im on the moped, forget about it, just doesn't seem to variate.
I'm using the stock spring.
Now that I think about it, it didn't seem like it would even rev up to the usual RPMS I used to get. I have a trail tech vapor and I used to see at least 8K. Wasnt seeing more than 4-5k rpm. I'd have to verify to be sure
This is on the stand with maximum weight. 16.15 g on each arm.