I was cleaning up the smoked motors around the shop and zipp'in off the parts that could be used on longblocks. keeping rovan,kingmotor, OBR , plain Zens parts sorted by make, I found the the clone motor flywheels had alot weaker magnets when sticking the coil to them to keep them as a set. I took a zen flywheel and stuck the coil arms on and snap it back off for a feel and did the same for the rovan and kingmotor, The zen flywheel has a very strong mag pull off and the others about 1/2 that. Would it make sense that the stronger field flywheels would overall work better ? I think it would help better at startup when moving slower to give a good snap at plug when pulling. Boy I can't believe how many OBRs these guys have cooked in the last year, Glad I did not pay for this pile of now scrap, ouch!!!. I'm glad I run RCMKs and R/C max , They both have been very very good to me and my wallet. I do know a bunch of these motors are cooked down from Amsoil cause I can smell the stuff in them.