So in the middle of a long ride, my inner rotor HPI Pinto sputters out. The crank seal had been spit out. It happens. But upon closer inspection when taking off the ignition (without splitting the case), the crank now has developed some play all around. Either the crank is f'ed, or just the bearing. Engine had about 500-700 miles on the rebuild. Bottom line is WTF.
Helpful Euro Puch tuners have suggested that an inner rotor on one side and a standard tight spring two/three shoe clutch's weight differential on both sides of the crank will eventually cause the crank bearing to fail -- due to the amount of stress. That is why HPI / Puchshop sells a 300g weight to balance the two sides out. The bearing could have failed for some other reason, not because of the HPI. Obviously, I must inspect it.
There is a good discussion about adding weight to a mini rotor on a ZA.
Before this motor is rebuilt for the third time, I was wondering if anyone had some insight into whether adding weight to an HPI is an ok idea (even if it does hinder spin up time). I really do not want to ditch the HPI set up, but I need my Puch not to develop major issues, as it is my daily / rally bike. Thanks! (edited)