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4th bearing flywheel support and modified oil hole question

This is a discussion on 4th bearing flywheel support and modified oil hole question within the Grom Talk forums, part of the Honda Grom Forums category; Can someone make a video of where to drill the hole to lube the bearing?...

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Thread: 4th bearing flywheel support and modified oil hole question

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    Can someone make a video of where to drill the hole to lube the bearing?
    235 2 Valve
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    BMW M3
    2017 GSXR 750

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    MSX UD ITA's Avatar
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    I drilled it yesterday.. No video sorry.. But when you have the piece in hands seems pretty clear where to drill.. There's no big choice. I drilled directly on the thread with 7mm screw

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    Quote Originally Posted by MSX UD ITA View Post
    I drilled it yesterday.. No video sorry.. But when you have the piece in hands seems pretty clear where to drill.. There's no big choice. I drilled directly on the thread with 7mm screw

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    Mine is already installed, installed long time ago just not drilled.
    235 2 Valve
    Supercharged AMG C43
    BMW M3
    2017 GSXR 750

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    Quote Originally Posted by CiscoSanJose View Post
    I did noticed that on the old grom 4th bearing support kit the hold down plate had zero spacing so I assume that oil will not drip down into the bearing for lube and the 2017 newer 4th bearing hold down plate seems to have a little spacer style design that looks like oil can slip down into the bearings.

    Anyone,,, just mounted the unit and let it be.
    YES! Looks like you are Correct Cisco, figured I'd mount mine without drilling the hole just to see.

    A weeks worth of riding, looks good.
    Attached Thumbnails Attached Thumbnails 4th bearing flywheel support and modified oil hole question-_20190414_184749.jpg   4th bearing flywheel support and modified oil hole question-_20190414_185159.jpg  
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    Quote Originally Posted by dubSolo View Post
    YES! Looks like you are Correct Cisco, figured I'd mount mine without drilling the hole just to see.

    A weeks worth of riding, looks good.
    dub that is exactly how mine looks to with no hole drilled.

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    You've got oil being fed to it. The instructions don't even say to do it. I'm not even sure if it was a big problem. I haven't been able to find many reported problems like you can find for the Koso lift plate and this whole drilling an oil port thing probably just stems off an isolating incident.
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    I got three groms running the koso plate also with no issues lol
    Djezspin and MSX UD ITA like this.

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    m in sc's Avatar
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    there were reports early on of them squealing which is what prompted it. theres -zero- downside to drilling it.
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    I think the 2014-15 year groms which used the older style stator had problems due to the way the hold down 4th bearing plate was manufactured to secure the bearing in place which had no space or machined slots to let the oil drip down, the 2017 and newer groms stator was designed a little different and the hold down plate for the 4th bearing had gaps machined on the plates so it would fit in the newer stator.

    So for grom owners who have the older 2014 groms pre-2017 grom if your stator goes out/fails it is cheaper to buy a 2017 stator and upgrade your rectifier to the newer 2017 unit at the same time, and when you buy the fourth bearing support make sure you buy the correct kit to match the year of the stator you installed. I did upgrade both of my 2014 groms to 2017 stator and rectifier and the reason why was it seems it had a better output voltage and there was no need to buy a special rectifier to run my LED head lights, LED blinkers, LED tail/brake lights and the only problem I have is burning up my LED license plate bulb circuit trace due to too much current or voltage draw to that unit and that is why I posted a section on if I need to add a certain valve resistor inline with the wire to the license plate + voltage side of the circuit.

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    170BBK, Did the oil mod for the 4th bearing. No need for a bottom hole. Gravity takes care of that. No issues.
    m in sc likes this.
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