How I rebuilt my Grom's front end after someone gutted it overnight

Nov 09, 2026 Last reply: 17 hours ago 3 Replies

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gsutton

Mine got hit in a campus parking garage during finals week, so I feel this thread. Someone took my front wheel skewer and my throttle assembly and slashed the clutch cable on the way out, probly out of spite when they couldn't get the bars off fast. What saved me was that my…

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Seeing a thread like this always stings because I went through the exact same thing a couple years back. Mine got stripped while parked at my old apartment. Handlebar gone, every wire and cable sliced clean through. I had almost no money at the time so I figured it out the cheap way and it honestly turned out fine. Start with the parts hunt before anything else. Stock Grom bars and controls show up used constantly because people swap them out for fat bars the day they buy the bike. Check your local classifieds and any Grom owner groups on Facebook. I got a full set of controls, mirrors included, for under a hundred bucks that way. The wiring harness is the scary part but you don't need a whole new one. Get a wiring diagram for your year, it's floating around free online, and splice in new pigtails for each cut line. Heat shrink every joint and route everything the same as stock.



For the brake line, if it was cut at the banjo you can sometimes just replace the line itself rather than the whole assembly. Bleeding the front brake after is fiddly but doable with a cheap one-man bleeder kit. Take your time with that one, a spongy front brake on a little bike is no joke.



Also worth asking your complex manager if any neighboring buildings have cameras facing the lot, even angled ones. Mine caught nothing but the guy two doors over had a doorbell cam that got a partial plate. File that police report update with whatever you find.


Mine got hit in a campus parking garage during finals week, so I feel this thread. Someone took my front wheel skewer and my throttle assembly and slashed the clutch cable on the way out, probly out of spite when they couldn't get the bars off fast. What saved me was that my school had a ride share board and a guy parting out a 125 sold me his whole front end wiring section for sixty bucks, connectors still attached. I traced the colors with a multimeter and it plugged right into where mine had been cut.

On the wiring side I'd say check if a salvage or part-out seller has the section you need before you start splicing a dozen wires. Soldering in the garage at night was my backup plan but the pigtail swap took me under an hour. If you do splice, stagger the joints so the finished bundle isn't fatter than the stock loom or the sleeve won't zip tie back in place.

For the brake bleed, I could never get the one-man kit to work on my little bike. A friend held the lever pinned and I cracked the banjo bolt, we did that three times and it was rock solid. Crude but it worked.

After all that I bought a $40 no-name camera off a used marketplace site and zip tied it under my balcony facing the street. It caught a delivery guy bouncing off my mirrors two months later, so at least I know it works.

Similar story on my end, some kid snapped the ignition switch clean off my Grom trying to jack it in broad daylight. The bars survived but the plug was mangled. What actualy got me thru the wiring was a pack of heat shrink butt connectors with the adhesive lining, the kind you shrink with a heat gun. Regular twist and tape joints failed on me twice before that, one came apart from vibration and the bike woud randomly cut out at stoplights. With those connectors everything held for the two more years I rode it. Also grab a cheap inline fuse holder if the thieves cut near the main fuse, saved me from cooking the whole harness when my first splice shorted.

First post here, long time lurker, sorry if I'm posting in the wrong place. My situation was a bit diffrent, my Grom was parked at a train station lot and someone just ripped the whole front brake lever off the perch instead of stealing the bars. I thought the lever itself was toast but the replacement was like fifteen bucks and swapped in ten minutes, so before buying anything used it might pay to check if it's just the lever and not the whole control. Also on the insurance side, my comprehensive claim covered the vandalism with no deductible drama, worth a call to whoever you're insured with before spending your own money. Did yours have the ignition wiring touched at all? That's the part I'd be most nervous about splicing myself.

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