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Old 09-02-2002, 09:02 PM   #16
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I have also busted about four shock shafts now.I am looking into getting the big bore shocks now and hope to have some input as to what set up works with them.
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Old 09-03-2002, 01:49 AM   #17
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If you are 'busting' shocks by trying to jump a tripple then fit some Kyosho shocks to the car.

The reason why Mugen shocks break is not due to the size of the shafts, but the length of the shock body. When you compress the suspension you will find that the piston hits the shock cap before the shaft is fully compressed into the body. This places a huge stress on the shaft, and if you are landing from clearing a tripple this will often be enough to break them.
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Old 09-03-2002, 02:49 AM   #18
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The Mugen has too much travel. Set the set screws in the arms or a better way is cutting some threads off the ends of the shock shafts and screw in the shock end even more.
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Old 09-03-2002, 04:33 AM   #19
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Dave and Dan are both right about the stock shock shaft length. Surprisingly, I never broke a shock shaft on my XR when I had it. Bent one, but never broke. I found the mugen shocks to be a little bit inferior compared to the kyosho's in terms of the anodizing. I've even tried the GS storm pro's shocks, and they too have better anodizing than the Mugen's. I was not able to try the bigbores on my car though, but driven cars that have them, they work the same as the standard bore shocks, but more reliable These are just my experience with using different shocks, just sharing some input. Good luck Kevin, happy racing

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Old 09-21-2002, 10:28 PM   #20
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I just bought a MBX-4 on ebay sans engine. What I need to know is what kind of shaft is needed for the easiest fit?
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Old 09-22-2002, 07:15 AM   #21
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Are you talking about engine shaft? If so, the easiest would be the "P" version, since the crank has the pilot shaft built onto the crank. If you need one, let me know, I have one for sale
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Old 09-22-2002, 08:01 AM   #22
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does mugen mbx-xr /rr use the same 8x16 size bearings ?
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Old 09-22-2002, 09:41 AM   #23
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8x16's used on drivetrain. Some misc. sizes used on other parts, namely, steering bellcranks and brake lever.
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Old 09-22-2002, 10:49 PM   #24
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I have the RB Worlds S7 with the entire SG crank still on it.All you need is the SG flywheel nut and voila.
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Old 09-25-2002, 06:19 AM   #25
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The big bore shocks from Mugen have larger shafts. Stock are 3mm and the BB's are 3.5mm. Same goes for the shock bodies. They hold more oil and use a larger piston. You'll need to get the BB springs as well. I've been using them for some time and have had great success with them. Re-builds will require Mugen shaft seals and bladders due to the larger size.
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Old 09-25-2002, 11:58 AM   #26
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I just got the big bores and found a funny thing.The OFNA Ultra GT has been using 3.5 mm shock shafts since it came out.What a piss off that another car has been using them this long without failure and it has taken until recently for the big boyz to finally catch up.
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Old 09-25-2002, 05:01 PM   #27
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Yeah, funny isn't it?

Put about a gallon and half through my Ofna Worlds 2 before I sold it and never bent a shock shaft.

BTW, so whats the word on the new Mugen buggy? Any info?
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Old 09-25-2002, 05:19 PM   #28
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This is the first I am hearing of it.
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Old 09-27-2002, 01:21 PM   #29
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There are rumors that Mugen is working on one right now at the Starting Grid forums. Plus, XR prices are dropping.
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Old 09-27-2002, 11:58 PM   #30
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you got a link for us to check?
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