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T R Robb Tuning Kit


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#31 secretagentmole

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Posted 28 January 2013 - 03:32 pm

Anyone who wants to tune one of these rifles would be better off getting advice from the Chinese airgun forum. From what I've read you don't need to buy a kit, just a set of seals and a bit of tinkering will bring them up to a decent level.
That means a cheap and relatively accurate little rifle for very little money.
I've used a standard one and was actually quite impressed with the accuracy but not the overall fit and finish.
I view the Chinese rifles as a real threat in years to come, old buggers like me can remember when we all laughed at Japanese cars and motorbikes, who's laughing now?
Certainly not BSA, Triumph, Leyland or a host of other once famous names!


OK you have not got the tools to start with, so you need a mini drill and bits, then you need the hammer block shaving down, do not know of many people who can knock the piercer and valve assembly off on a lather either. Plus you do get a very good instructional DVD, it is all very well saying you can find the steps on the Chinese Airgun BBS, but this is a step by step filmed strip down and reassembly, so every point is covered! For the money it is a very good kit, it works and has proven good effect.

I know it will never be as good as an HW or Daystate, but the 78 or 79 is more capable than a lot of shooters realise.

Edited by secretagentmole, 28 January 2013 - 03:36 pm.


#32 timmytree

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Posted 28 January 2013 - 03:41 pm

But don't you find it satisfying when some pimply little prat with zits like volcanos driving a 1.2 Saxo with 6 exhausts, blue lights and plastic wheeltrims decides he's going to burn you off at the lights?
I drive an old "grandad" Primera that can outpace them, but on a dual carriageway I prefer to just keep alongside them until they run out of steam and panic! :laugh:
Better still is the few times when I've been in my eldest sons Escort MK1 rally car, road legal and fun!
That eats just about everything off the lights, 300+ BHP and geared down. Bloody quick! :icon_eek:

#33 jackinbox99

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Posted 29 January 2013 - 11:39 am

Excellent read and sounds like a great project. For me, I love tinkering and for me its more about the technical side of things, playing & learning and having achieved a good result.

#34 secretagentmole

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Posted 29 January 2013 - 12:36 pm

If you want to get really involved all you need is a Welsh Willy seal kit (or seal and screw set if you wanna go bling with stainless), Drill the probe apertures out to 3mm, sand the trigger sear, fit a couple of shim washers to the trigger and apply a little Moly CV grease.

If like me you doubt your fingers of clay can drill the probe then the T R Robb kit is good value as it comes with the probe and a load of other new bits (such as a piercer, valve and hammer block) as well as the excellent video instructions!

I have also fitted a QD stud to the front of the stock today (this is advanced for Mole), all I have to do is get one for the back now!

#35 tomburras

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Posted 29 January 2013 - 08:10 pm

If you want to get really involved all you need is a Welsh Willy seal kit (or seal and screw set if you wanna go bling with stainless), Drill the probe apertures out to 3mm, sand the trigger sear, fit a couple of shim washers to the trigger and apply a little Moly CV grease.

If like me you doubt your fingers of clay can drill the probe then the T R Robb kit is good value as it comes with the probe and a load of other new bits (such as a piercer, valve and hammer block) as well as the excellent video instructions!

I have also fitted a QD stud to the front of the stock today (this is advanced for Mole), all I have to do is get one for the back now!


cheers for the info secretagentmole I have one of theese in the pipeline for a bit of a tinkering project and bit of fun. looks like an interesting and cheap project.

#36 secretagentmole

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Posted 29 January 2013 - 08:23 pm

For crying out loud make sure you have a chrono! They are very easy to put over, that is the one warning! Mine hit over 13, had to swap the hammer block back for the original one!

#37 tomburras

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Posted 29 January 2013 - 08:27 pm

For crying out loud make sure you have a chrono! They are very easy to put over, that is the one warning! Mine hit over 13, had to swap the hammer block back for the original one!


yes of course, it would be irresponsible modifying airguns without having one available :thumbs:

#38 milegajo

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Posted 29 January 2013 - 09:05 pm

I cannot second moles chrono advice strongly enough.

It may have been unique and a one off event, but i feared for my own safety when two shots of my hpa converted 79 registered 40ftlbs on my combro.

Thankfully the rest of the string dropped to 11.9 but it didn't take long to creep over to 13.

Please please please do not dismiss it. I believe a gun owner without a chrono is asking for trouble like a driver without a speedometer.
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#39 tomburras

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Posted 01 February 2013 - 10:14 pm

well secretagent mole you got me going on this and today I picked up one of theese today, I ended up buying one for £80 brand new. Iv ordered the t r robb tuning kit and before fitting im going to polish the hammer and tube. when it arrives im going to start at 800 grit then brasso the parts with a drill with a 12 bore cleaning mop and the 2nd half of the cleaning rod and should hopefully end up with a mirror finnish. upon stripping I could see all the machining marks inside so can understand the difference after polishing as it was verry rough!

I can understand people thinking why? but co2 is a first for me and would like to give it a go to see what its all about just so i have the experience of it.

I will post an update when the work is done. when I stripped the gun for a look, combined with the rough internal machining I noticed the transfer port seal was missing. which shows poor quality control from the chinease factory. luckily the kit has one with it.

I will update when the gun is polished internally andthe kit is fitted.

atb tom.

#40 secretagentmole

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Posted 01 February 2013 - 11:17 pm

Where did you get one from for £80 sir? The wife is interested in one of these!

#41 georgenottingham

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Posted 01 February 2013 - 11:37 pm

Someone was asking for a th78 stock here last week. There is one on ebay!

#42 georgenottingham

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Posted 01 February 2013 - 11:41 pm

Its been sold. 35! There is still trigger and hammer assemblys to play with!

#43 tomburras

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Posted 02 February 2013 - 12:03 am

Where did you get one from for £80 sir? The wife is interested in one of these!


kirklees guns brand new in box

edit: sent pm too.

Edited by tomburras, 02 February 2013 - 12:12 am.


#44 tomburras

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Posted 02 February 2013 - 12:05 am

Someone was asking for a th78 stock here last week. There is one on ebay!


theres many parts on ebay, a suprising amount infact. so if i mess up should be cheap to fix hopefully.

#45 georgenottingham

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Posted 02 February 2013 - 11:42 am

Yeah loos like someones stripping down. Do you know if the crosman barrel spacer fits the 78?


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