Zongshen RX3 Torque Specifications: Please Contribute!
 

If you discover a torque specification for a critical bolt of the Zongshen RX3, please contribute it to this thread. :) I will gather the information from this thread, and add the confirmed torque specifications to a closed thread, which is pinned to the top of this forum, at the following link. Thank you for your help. :)

http://www.chinariders.net/showthrea...111#post198111

50 lb-ft for the rear axle bolt per Gerry.

Thank you, RT. I will add it to the list. :)

Correct me if I am wrong, but am I considering buying a do-it-yourself maintenance bike that doesn't have published torque specifications?:hmm:

Jim

The Owner's Manual which comes with the bike is excellent. However, it is not a full service manual. It does not include information for assembling and disassembling the engine, and it does not have torque specifications for most of the bolts.

I purchased full service manuals for my other bikes, and they include tables with torque values for different size bolts. You can also call Gerry at CSC, and he will also provide you with bolt torque specifications.

If you have further questions regarding this matter, I suggest you contact CSC for more information. ;)

Thanks for the info, Spud.

Jim

You're welcome. :)

http://chinariders.net/showpost.php?...75&postcount=2
I edited those info into smaller (~10? kb) html in my local drive. Any volunteer (for translation & hosting)?

Thank you for reminding me of this thread, HB. :) Do you think the author of this thread is reliable? Where did he get the information?

If the information is good, I think my web browser can translate it well enough for me to gather the data we seek. :)

That format seems scanned from printed material (images are missing)...
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Rx3 serivce manual looks like this http://www.motorfans.com.cn/bbs/t_17991538.htm

I would love to purchase an RX3 Service Manual in English. :) Have you ever seen one, HB?

FYI ... 50 ft-lb = 67 NM :tup:

Per Gerry...54 ft lbs for the swingarm bolt.

Thank you, sir. I added this information to the confirmed torque specifications. :tup:

http://www.chinariders.net/showthrea...111#post198111

Thank you, sir. That information has been added to the confirmed torque specifications. :tup:

Now, THAT is interesting! Completely new head design, new single piece valve cover. I do not see the screw and lock nut valve adjustment so I'm guessing it's shim under bucket. Maybe that alone will lead to longer valve adjustment intervals. All in all this looks like the answer to those who found the RX3 to be under powered. I hope the weigh somehow comes down too.

It's nothing new, just an old engine with a different head and cylinder has 1 mount differently, when I changed the cylinder I thought whether to buy this head is for 300$, but it turned out that the difference is very small in power, so just change the map and it is the same in addition this solution has a disadvantage, because the chain, when it stretches slightly changes the timing phase and requires modification of the top bracket the engine is called NT. 250 and the pictures are from ali express store and this chinese guy must have eaten rice from plastic, because he has such prices thathands are falling down, and for this engine he wants almost as much as for whole motorcycle.

Darn, I was hoping for 30-35 hp and easier maintenance.

Unfortunately fitting this head besides requiring reworking the brackets makes it practically impossible as far as I can see to unscrew the spark plug without at least pulling the tank off, but it is possible that it may require unscre the engine, and since a normal head has 4 valves the difference is small I saw a zongshen rx3 nt250 commercial somewhere on YouTube but can't find it.In the ad it says that supposedly 2.5 horses more, but it is not known whether in the entire rpm range, from what I have read on the subject some sources say that this solution adds power in the lower parts, and others that in the upper parts, i would have to think about it deeply.