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My KWA M41a "Tune up"


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#1 karMeister

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Posted 23 July 2008 - 10:52 PM

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Finally took it apart after around 85,000 rounds with 11.1 Lipo 15c



What i found out:
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Check on parts:  
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Switch assembly
: I was surprised to see it intact! not burned by the 11.1 lipo! I have seen TM and CA trigger switches burned by just 9.6v subc!
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Piston Body: Regular wear from high ROF. 1/3rd of  teeth peeled off from catching the gears.
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Gears :
Shimless! After stripping the grease out with gasoline, the gears look like theyre brand new! No wear at all!  (thers this crack on my sectr gear's  "shim"? near the axle but It looks like it was a factory defect but it doesnt affect the gears or performace.

*The gears have the normal TM/ICS/CA ratio
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Bearing Bushings:
Looks new! feels new!

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Piston Head:
I see a few small dents on it. cleaning/relubing the cylinder and cyl head should do it. Was a bit dissapointed to see washers instead of bearings. Replaced the washers with a guarder bearing set i had lying around.

Spring guide:
Version 3 on a version 2 gearbox?  hehehe!  Like the Piston head It uses 3 washers. not bearings.

Cylinder : It is firmly attched to the head and very hard to take off! I dint take it off so i wouldnt mess with the compression.

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Gearbox: We all know that its thick on the front. Great design even from the inside! I noticed a part added to hold the wire down near the bevel gear! great innovation! Im sure the guy who designed it had the same problem i had! (the wire caught the pinion gear so i coudnt take the motor off!)
The gearbox has an interlocking design that makes it a strong
solid piece.

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Note:  The Piston body can still take some pounding but can stand to be replaced if i change to an sp130.  I have an extra torque up Hellical systema but It wont match the bearing bushings. Im stll looking for a 9mm pair and 2 pairs of  8mm bushings. or Ill just have a  Ertalyte TX made. :lol:

  :lol:

Edited by karMeister, 25 July 2008 - 12:49 PM.


#2 Guest_allizard_*

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Posted 23 July 2008 - 11:14 PM

Thanks for the very informative update... I hope to see another update when you reach around 100,000.   That would be a major mile stone.

#3 hammer

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Posted 23 July 2008 - 11:15 PM

Kabayan!

Nice info..im waiting up for the pics.

#4 karMeister

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Posted 24 July 2008 - 06:02 AM

Replacing parts with:
Deepfire Titanium teeth, Guarder Version3  Spring Guide with Bearings and Guarder Piston head bearings (just the bearings will use the KWA Piston head.

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#5 hammer

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Posted 24 July 2008 - 04:54 PM

ohh..more updates...

beef up your internals and test it..I will follow suit :)

#6 Guest_Radix_*

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Posted 24 July 2008 - 07:47 PM

Very nice ... I have a first generation M4A1 that went through 100,000 rounds on 11.1V Lipo and the internals look like yours with the exception of the piston being a bit more chewed up. :)

#7 Doctor Kajita

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Posted 24 July 2008 - 08:05 PM

Thanks for posting!  Very informative.

#8 Stealthmaster14

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Posted 24 July 2008 - 09:20 PM

I'm about the 10th person to say this, but for what it is worth, that was very informative, thanks for posting.  :)


So the gears don't have shims?!!

............isn't that really bad?

Edited by Stealthmaster14, 24 July 2008 - 09:24 PM.


#9 Guest_allizard_*

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Posted 24 July 2008 - 10:38 PM

View PostStealthmaster14, on Jul 24 2008, 10:20 PM, said:

I'm about the 10th person to say this, but for what it is worth, that was very informative, thanks for posting.  :)


So the gears don't have shims?!!

............isn't that really bad?

Heh no.. because KWA manufacturing process is perfect and precise.  There is no need for shims.  They fit perfectly in the gearbox.  

On the other hand, you put shims in on OTHER brand X gearbox because they can't make it perfect. Yes... talk about KWA bragging rights!!!   :lol:

#10 karMeister

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Posted 24 July 2008 - 11:51 PM

Thanks for the kind words  :D

Yes its precise and doesnt need shims unless you are replacing it with an after market gear set. I wouldnt advise bearing bushings on a hellical set.  


I didnt change anything yet but the bearing on the piston head and the spring guide. As i was putting it back together I decided to make full use of my piston body and wait till it wears. (Im thinking 40k more rounds on this piston body with the stock spring) I will be installing an sp130 soon.  B)

Edited by karMeister, 24 July 2008 - 11:52 PM.


#11 Guest_Inu One_*

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Posted 25 July 2008 - 06:29 AM

Awesome post! My M4 has passed 100,000 rounds on Li-Poly, only replacement to date was a piston at 75,000 rounds. I wished I'd taken some photos of the internals when it reached the 100,000 rounds mark.  These guns are really built to last.

#12 Guest_allizard_*

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Posted 25 July 2008 - 03:53 PM

so awesome I remove his warning level!!

#13 Guest_Inu One_*

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Posted 25 July 2008 - 04:12 PM

View Postallizard, on Jul 25 2008, 04:53 PM, said:

so awesome I remove his warning level!!

What is "warning level"?

#14 karMeister

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Posted 26 July 2008 - 12:50 AM

View PostInu One, on Jul 25 2008, 04:12 PM, said:

What is "warning level"?


special accounts get warning levels...  I have a meter!  :P

#15 karMeister

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Posted 01 August 2008 - 01:34 AM

I forgot to mention that it has a sector chip installed! hehehe!

#16 vic_man4

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Posted 01 August 2008 - 01:39 PM

View PostkarMeister, on Aug 1 2008, 02:34 AM, said:

I forgot to mention that it has a sector chip installed! hehehe!

It shows a golden coloured sector chip installed on the picture for the gearset in the proshop.

#17 rdlu62

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Posted 01 August 2008 - 02:34 PM

how come one of the photos shows that the spring guide has all washers? if you go to the pro shop, the original replacement spring guide has bearings on it?

#18 karMeister

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Posted 02 August 2008 - 05:07 AM

View Postrdlu62, on Aug 1 2008, 02:34 PM, said:

how come one of the photos shows that the spring guide has all washers? if you go to the pro shop, the original replacement spring guide has bearings on it?


Quote

exclusive 8 and 9 mm ball bearing bushing combination and case hardened,

The bushings are bearings but the Spring guide and the piston head have washers.
I dont know about the proshop. Maybe radix or allizard can answer this  :rolleyes:

#19 rdlu62

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Posted 02 August 2008 - 06:17 AM

yeah i was just wondering since what's in the pro shop are supposed to be "stock" replacement parts which should mean they're supposed to be the parts that's inside your m4a1. but when i look into the spring guide in the pro shop, they have the one with bearings.

maybe it depends on whether you have the 1st gen or 2nd gen m4a1?

#20 karMeister

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Posted 02 August 2008 - 06:41 AM

View Postrdlu62, on Aug 2 2008, 06:17 AM, said:

yeah i was just wondering since what's in the pro shop are supposed to be "stock" replacement parts which should mean they're supposed to be the parts that's inside your m4a1. but when i look into the spring guide in the pro shop, they have the one with bearings.

maybe it depends on whether you have the 1st gen or 2nd gen m4a1?


Posted Image

Its hard to tell when youre holding it, because it looks like the normal bearing type spring guide, unless you take a closer look at it. Its harder to tell from the picture. And it is made the same way. You cannot take the washers apart just like the bearing type spring guide. So, unless you take a very close look at it, you cant tell the diff until you see the ball bearings or the inclined washer

Edited by karMeister, 02 August 2008 - 06:44 AM.





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