taco eater :
Alan Blake from Macedonia, OH United States
Beautiful quality crankshaft, but the keyway for the flywheel was cut 60° out of position compared to my stock crank, making it impossible to set the ignition timing correctly. Not sure if it was a manufacturing defect or not, but since it was already installed, I had no choice but to go without the woodruff key, and manually align the flywheel to the crankshaft so that the points opened at 15-20° before actual TDC. So far, the taper on the shaft has kept the flywheel from slipping.
Was this review helpful to you?
0 taco eaters like this review
for mega speed
Saturday, June 16, 2018
taco eater :
jeremy pochwat from newark, DE United States
so my circlip on my stock d motor slipped out and killed the jug so i bought this with a arisal kit. This thing does sacrifice some low end for lots hi rpm magic. My only gripe is the vibrations can get a bit cray cray but overall well worth the money
Was this review helpful to you?
0 taco eaters like this review
Hasn't blown up!
Friday, June 17, 2016
taco eater :
Sam Smith from Madison, CT United States
Last one blew up, so I got this. Not only is it the only replacement I could find, but it actually has a new powerband that can be felt. Some low end loss, but it more than recovers it after 7 mph
Was this review helpful to you?
0 taco eaters like this review
You spin me right round baby right round
Saturday, June 4, 2016
taco eater :
Nick from CT
Have it on a 1978 sach Columbia commuter with a505 1b, works excellent just make sure you check your squish because stock cranks are mostly 43mm so I just used an extra base gasket but still be careful and measure
Was this review helpful to you?
3 taco eaters like this review
silky smooth
Friday, February 10, 2012
taco eater :
KDM from Auburn, NY United States
seriously this thing will make you cry yourself to sleep at night.
Manufacturer description:
This full circle crankshaft for the highest standards. By silver cage bearing, optimized connecting rod and excellent workmanship, this wave of over 16,000 U / min.
Benefits of full circle crankshaft: High precompression in the crankcase which leads to a greater negative pressure, thus, more fresh gas is drawn in and the flow rate increases. The performance is thus shifted to higher speeds, which means more power and some losses in the lower rpm range.
suitable for all Hercules 505 engines with 44mm stroke, such as Hercules M / Prima 2 3 4 5 6 N, S, SL, SX Jogging, Basic, MX1, Optima 3
Nice Crank But Keyway Was 60° Out of Position 
Hasn't blown up!