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  • Clutch Springs Overview:

    Mugen Seiki MBX Clutch Springs. These replacement clutch springs are intended for the MBX 1/8 nitro platforms to allow racers to fine tune the clutch to fit track conditions.

    Includes:

    • (3) Clutch Springs

    *Note: Stock Springs are (1.0mm)

    Effects of Clutch Spring Changes

    Spring

    Characteristic
    Softer

    • Clutch engages earlier at lower RPM
    • More gradual acceleration
    • Easier to drive but not as aggressive
    • Easier to drive on low-grip tracks
    Stiffer

    • Clutch engages later at higher RPM
    • More sudden acceleration
    • Car is more aggressive
    • Engine will perform better on high-grip tracks

    This product was added to our catalog on May 27, 2004

    • Mugen MBX5 Original
    • Mugen MBX5R
    • Mugen MBX5T
    • Mugen MBX6 Original
    • Mugen MBX6R
    • Mugen MBX6T
    • Mugen MBX7 Original
    • Mugen MBX7R
    • Mugen MBX7T Original
    • Mugen MBX7TR
    • Mugen MBX8T Original
    • Mugen MGT7 Original
    • Mugen MGT7E

    Eric Larsen Verified Owner Monday, Jul 31 2023 (about 2 years ago) Mugen Seiki 3-Shoe Clutch Springs (3) (1.0mm) I installed these on my Savage X with the stock motor and Dynamite max-life aluminum shoes. I did NOT change over to the Mugen flywheel not like some recommend and it seems to be fine. The springs sit in there at a bit of an angle with the stock flywheel nut, but no shimming required and so far so good. Adam Castaneda Verified Owner Friday, Apr 26 2019 (about 6 years ago) Mugen Seiki 3-Shoe Clutch Springs (3) (1.0mm) Put these on my Savage X. They work great with a Mugen Nut (MUGC0704) as the springs rest perfectly. Initially I tried to install these with the HPI clutch/pilot nut and the recessed groove sat so far back (towards flywheel instead of clutch side) that to get the springs to sit I had to almost bend the tip of the spring at a crazy angle. I was not comfortable with keeping the stress of the mount area on the stock nut. So if you get these springs make sure you also buy the mugen nut as well. View all reviews

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