cylinder base torque specs?

[steve.emma]

anyone able to tell me the torque specs for the cylinder base nuts on a 99' kdx? i did a search but was only able to find cylinder head nut torque, (18ft/lbs?) is this right? thanks.
steve.

 

[chevy383cid]

On my 2002 kx250 the service repair manual calls for 18 foot pounds on the base and 25 on the head!!

 

[blackduc98]

My kdx manual show same torque for head and base: 25 N-m (aka 18 ft-lbs)

 

[steve.emma]

thanks guys! ;)

 

[Kwakasaki]

My question is how are you going to torque the cylinder nuts. You can only get to one of the front ones with an open end wrench. Unless there is some special open end torque wrench im not familiar with, I equally tightened each of the four lower nuts and set the head on it. You could use an offset epen end and attach the torque wrench but you will not get a true reading to my understanding. At 20 lbs of torque it started stretching the stud. The second one did the same thing. I went 15, 18, then 20. The remianing two i set at 18 scared of pulling a stud. Before the second two were torqued i compared the settings to an older torque wrench i had and they were identical so i know the tool wasnt off. Spoke to a mechanic at the local Kaw dealer and he said they tighten the lower four equally and do not check torque and set the upper four at 20 because of the same situation i ran into. Be real careful if you are going to go for 25 on the tops. Im sure someone will tell you different but this is what i have run into and wanted to share.

 

[blackduc98]

My question is how are you going to torque the cylinder nuts.

There is a proper tool for that. I would not use an open-end wrench to torque those nuts because it'll strip the nut flange. MotionPro makes a proper tool: http://www.motionpro.com/motorcycle/tools/torque_wrench_adapter/ If you don't want to spend $17 on this tool, then you can make your own by welding a socket to a 12mm wrench.

Another option is to use the following little trick I discovered when I did my top end: it turned out that the open end of a 12mm box wrench fits perfectly onto a 3/8-to-1/2 ratchet drive converter. So I attached this converter to my torque wrench, and placed the other end of said converter into the open end of 12mm box wrench, while placing ring end of same wrench onto the cyl nut.

Since you'll be extending the effective length of your torque wrench, you must reduce the wrench torque setting. There are lots of references on the web, and here is one of them: http://www.norbar.com/torquewrenchextensioncalculator.php

At 20 lbs of torque it started stretching the stud.

That's because 20 ft-lbs is too high! Read your manual: it clearly says 25 N-m which is equivalent to 18 ft-lbs.

Spoke to a mechanic at the local Kaw dealer and he said they tighten the lower four equally and do not check torque and set the upper four at 20 because of the same situation i ran into.

I would find a different mechanic, like someone who pays attention to factory torque specs and also understands the difference between Newton-meters and Foot-pounds.

 

[Kwakasaki]

:nener: Actually I am going to send my bike to Nasa next time :rotfl: :laugh: