Starbuck

OK guys quick update. I installed the Rocket Tappet plate (SHS), taking care to see when it was fully back, sanding a little, then checking the release and sanding the lower fin a little. I also shortened the tappet spring by 2 coils. Gun now shoots lasers bang on legal limit on semi... Auto, it drops 40 fps and is a bit inconsistent. Im going to order a 7.4v Lipo and try it on that and see if full auto works more consistently. I really appreciate all the help guys. Thank you.

Cyma Platinum. Done.

Thanks for the reply 👍 My plan now is the following: 1: Use the Rocket tappet plate and sand it down a little as I think I removed too much from the standard one so it was returning too fast on full auto. Semi loads fine it’s just burst or full auto it struggles. Struggles a little if I spam semi auto as well. 2: I need to try and clean the barrel and hop rubber. I never cleaned the barrel once since it arrived and what I gather they all need it. Insane. I can’t imagine putting any of my previous machining work out not immaculate. Different standards I suppose. This could be contributing to the random ball flight. The ZCI hop unit you linked me to looks identical to the one in the gun. I’ll get it for the few quid it is and also the hop rubber and nub to recommended. Going to get a 5” barrel extension on it and go to a 363mm ZCI barrel.

Thank you guys very much for the replies. To answer some of your questions above: Battery - Nuprol 11.1 1300mAh 20C/40C Compression - It’s amazing. As soon as it goes past the port it’s like a rock with the nozzle in or extended with tappet plate fixed on end of cylinder head. Hop Up Unit - The ProShit unit is garbage. It’s going back. It’s just awful. I’m using the standard rotary hop. Piston Head - The Maxx and the Element both have the bearings inside them. I’ve noticed the spring sits with the bearing inside the spring. Is this right? Mosfet - Yeah I bought the M904 because A - it was cheap and B - because it had a mosfet. The only reason I swapped it out was I thought I blew it when I plugged in a 11.1 15c 2200mAh. I’m sure it wasn’t this now and it’s actually fine. So before I got a chance to read them I stripped it down and checked the piston, it was binding on the gearbox when it went back and we are talking something awful. I had another piston there and swapped it out for that and that brought the FPS up to 310-315 on 0.25g. The two issues I’m now having is the ball flight is garbage. It wasn’t great stock but now it’s a bit ropey. Hop is all over the place and is hard as balls to set. The BB’s done flat straight they fly all over the fucking shop. The second issue the gun doesn’t work worth a fuck on burst or full auto. It’s like the fun loses all power and the drop like stones 30 feet out the barrel. I think this is possibly because I shaved too much off the tappet plate. I have a new Rocket tappet plate there I can fit and shave a little off. If you have any input on the above that would be amazing. thank you again guys.

Hi there, Never having tech’d a gun before I decided to jump balls deep into a fire filled hell. I am very proficient with tools and building machines so technical know how is good. I bought a DE M904E to serve as my teaching platform. V2 gearbox, high fps, easy to break down, built in mosfet etc. Before anyone says it I fully realise this is the most overly upgraded £110 pound gun 😂 I did this solely to learn how to tech through advice of a friend of who is a legendary tech and watching untold amounts of YouTube videos. So I decided to go with the following: Gearbox: Rocket 12:1 Gears Element Silent Piston and Cylinder Head (also have a Maxx piston and cylinder head here) Maxx Titanium adjustable nozzle SHS Polycarbonate Piston with full metal rack 14 teeth ASG 8mm Bearings Rocket High Torque Motor Perun V2 Optical Various Rocket or Guarder Springs Barrel & Hop: Madbull 6.01 230mm ProWin Hop Unit (ditched and reverted back to stock rotary hop unit) Various selection of hop rubbers and nubs. Found the Prometheus Blue Flat Hop bucking and nub to be best. Once I completed the build the issue I was having was unbelievable overspin and a whopping FPS of 160 on 0.25s... So I short stroked the gears, two off the pickup, one off the release and took three teeth off the piston rack to match. Enabled AB on the mosfet and voila a better but still shocking 270ish FPS but no overspin on 0.25s. This was running a Guarder SP120 so even with three teeth off, and I may be wrong but this is was lower than it should be. I’m trying to hit 350-360 on .2s so 1.2j all in. This should be hitting 320fps with 0.25s. I don’t know where to look for the loss. The piston/cylinder/nozzle compression is excellent. The stock tappet plate spring is strong as balls. I bought a spare tappet plate spring and it was longer and weaker. The only thing I can think of is trimming the tappet plate to release earlier and maybe removing a coil or two off the tappet spring. Other than that I’m out. What do you guys think? Any other ideas where I should be looking? Any help is appreciated.