[Azathoth]

Originally Posted by tehmedic

Hi. I have modify gears that I ran with a modify high speed piston and It broke. Also I have a 509mm inner tbb for the full cylinder.

I'm not surprised the modify piston broke. Generally speaking high speed pistons shouldn't be used in guns that shoot >350fps.

However your situation hasn't really changed. Typically I assume that 'gun won't cycle' issues are problems caused by awful batteries and/or chargers. Like people using wall chargers and vanaras branded batteries etc. I"m right with this 9/10 on the field when I plug in my battery to their gun.

The second most common issue is motor height being FAR FAR too high and binding the entire gear train. Back down the motor height to test.

When you have your GB and pistol grip on the box, and you pull the trigger do you smell and burning, hear any clicking sounds or is their just absolutely nothing? Test this by taking the motor out of the grip and pulling the trigger with the motor leads connected testing your electrical system and motor function. The box SHOULD cycle with the motor in.

If it's neither of the above, you need to re-open the box. The next thing I would hazard a guess at is without seeing it is over-shimming and awful AOE engagement as you are tearing the pickup lugs off the pistons.

Youtube AMOSV2 and find his video on proper AOE, it's a great guide for newbies.

Originally Posted by Spawn28

Have you tried removing the bearing from the piston head some times when you have a bearing springguide and a bearing piston head it wont fully cycle and gets locked in the full back position. Had this happen in my CA when i threw a 120 tuneup kit in.

I have never heard of being a problem. I run bearings on both spring guide and piston head in all my upgraded guns. As the spring is being compressed you want both ends of the spring to twist and turn freely. If you take a well used spring out of a AEG with just bearings on one end, you will see that it doesn't stand straight anymore and is rather crooked. If you use bearings on both ends, the spring tends to retain it's original shape far better and give you a longer and more consistent life.

Originally Posted by bareass

i'm not a supreme gun do or anything, but you did mention that you are running a full cylinder in an m4.... isn't that a no no?

No, changing the porting on your cylinders is how Marui maintains all of it's gun at ~280 FPS regardless of barrel length using the same spring. If you are shooting >400 FPS, I personally see no reason why you should just dump out the ported cylinder regardless of barrel length silly setups aside. It's how many users are able to run lower power springs to achieve 420+ velocities, thus getting them snappier trigger response, and higher RoF