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Old 07-03-2007, 08:12 AM   #121
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Maybe try boiling them before installation? It might make the holes tighter.
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Old 07-03-2007, 11:13 AM   #122
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I haven't had an issue with the PBs backing out, but I have had troubles with the arms breaking right where the pillow balls thread in. At the last race I went to, I broke three lower left front suspension arms. All of them broke the same way, the trailing edge of the arm where the ball threads in broke away. Two of the arms had less than 10 minutes of run time on them, and it's not like I was running into everything on the track. the second one broke three laps into my second qualifier and I hadn't hit anything. Mugen wants me to send my arms in and says no one else is having issues... BS. There's a team guy at the local track and ironically told me about the issue before the races started that evening.
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Old 07-03-2007, 02:39 PM   #123
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vgibbens glad to hear i'm not the only one with this problem I hope Mugen take this serious , 5r is such an awsome buggy but i don't want to be putting arms on every day i need to race hopefully i recieve some feedback from them today better not be full of BS
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Old 07-03-2007, 06:04 PM   #124
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I've broken 2 uppers and 1 lower arm so far, just brushing up against pipes. This plastic does not feel the same as the original x5, seems alot stiffer.

Boiling them will make them more flexible.



Didn't Scott Hughes drop out of the Nats due to a broken arm?
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Old 07-04-2007, 12:26 AM   #125
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Got some feedback today this is what Mugen said

Thank you for your mail and picture.
We have checked the picture.
Actually, we could not decide the accurate appraisal to see the broken arms,
but as we see the picture, it seems that there is the problem in the injection.

We will inform to our distributor in Australia concerning this and ask them to
contact with you and send you the replacement arm. Therefore, we would like you to use it.

We are sorry for this inconvenience.

I can't complain about there Support on this matter
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Old 07-04-2007, 09:34 AM   #126
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I am running lower arm rings. It is a lower arm with a radius carved out about 1/8" in on teh outside of the arm and then a metal band put around it. This stops the arm breakage from happening. It has worked great for many gallons now. I will post a pic sometime, I will have to take a pic of it first.

Thanks,
Casey
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Old 07-04-2007, 11:51 AM   #127
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i have hit about anything there is to hit and i have yet to break an arm maybe there was just a bad batch of plastic on a run or 2 of parts?
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Old 07-04-2007, 12:33 PM   #128
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our local track has big jumps and I have yet to brake an arm...knock on wood...maybe it was a bad batch that got out...
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Old 07-04-2007, 02:13 PM   #129
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Quote:
Originally Posted by wrightcs77 View Post
I am running lower arm rings. It is a lower arm with a radius carved out about 1/8" in on teh outside of the arm and then a metal band put around it. This stops the arm breakage from happening. It has worked great for many gallons now. I will post a pic sometime, I will have to take a pic of it first.

Thanks,
Casey
Casey will be doing this mod on the weekend how long did you make the band ?

got a 3hr enduro coming up next weekend don't need it falling apart again

cheers Mick
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Old 07-05-2007, 12:48 AM   #130
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Got cracking on the arms today My Sleeve dimensions are 8mm wide I.D. 1/2 inch O.D. 17mm , the o.d. could of possibly been smaller but i tend to over engineer most things i do . used the jig i made and turned the arm to 12.90 mm which makes for a nice push fit .
Attachment 245795
Attachment 245796

If you want any more pic let me know

Last edited by Slippery; 08-15-2010 at 10:29 PM.
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Old 07-05-2007, 01:24 AM   #131
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Did you turn the arm on a lathe? Just wondering how you got the arm centred for the cutting?

The only downside with doing that though is you'll have a nasty sharp corner where the metal finishes which is really bad for stress concentration.
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Old 07-05-2007, 01:34 AM   #132
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Arm turned on lathe Made a Jig to hold arm so it centered up correctly , this was the hardest part of the job . Yea square edges are not good but still better than fu**ing arms every week
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Old 07-05-2007, 05:28 AM   #133
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Mine are about 1/2 tht width, actually they are only about 3 mm wide. They work great. Just make sure they don't fall off, they really mess with your steering then. Good luck, I love mine.

Thanks,
Casey
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Old 07-05-2007, 06:49 AM   #134
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Nice. I may have to make some of these as well before I strip an arm.

I'm noticing the droop screws are digging into the chassis a little more than I'd like, which will eventually work it's way through the chassis. If I dont sell/trade the car, I will be getting a new chassis and have it hard anodized. Would probably be a good idea to do all of the aluminum pieces too.
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Old 07-05-2007, 08:05 AM   #135
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just replace the droop screws with ones that have a ball tip...they won't dig into the chassis then....
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