Hellcat 125 Vibration

Ryandva · 05-15-2020, 05:49 PM

Hi all, I have a 2020 Hellcat and the only mod I have done so far performance wise is Mikuni VM22 carb along with aesthetics. When I have the bike pinned in 4th gear there is a strange vibration coming form the front, if I let off the throttle it seems to go away and if I give it a small amount of throttle again it seems to come back. Has anyone else encountered this issue before? Another bit of info is that my bike was shipped without the middle nut for the triple tree so I'm waiting for that to come in. Not sure what is causing the vibration though.

RedCrowRides · 05-15-2020, 10:57 PM

i'd guess its the headlight fairing buzzing ,these engines arent counterbalanced and the plastics dont have rubber washers between them and the mounting points so they tend to get "buzzy" when you really run up the RPM's.

Some foam tape or rubber washers will help fix that , of course it might be something else but since it goes away if you back off the gas even though you are still basically going the same speed, its likely being induced by engine vibration .

Biker_Andy · 05-15-2020, 11:36 PM

I'd get it up straight and have a real good look to make sure the alignment is good. If it's off enough to worry about you should be able to tell but the bike has to be upright. Then make sure every single bolt is tight.

Megadan · 05-16-2020, 02:33 AM

I Wouldn't even be riding a bike that didn't have the main center nut for the top triple clamp on. That doesn't just help hold the triple clamp on, but it also helps apply pressure to the nut under the top triple that holds tension on the steering stem bearings.

Ryandva · 05-16-2020, 08:15 AM

I work at an auto parts store and tried to find anything that I could throw on fora quick fix until the part comes in but its a strange thread pitch. But you're right and I wonder if the vibration at higher speeds is caused by the nut not being on.

05-15-2020, 05:49 PM	#1
Ryandva Join Date: Apr 2020 Posts: 7	Hellcat 125 Vibration Hi all, I have a 2020 Hellcat and the only mod I have done so far performance wise is Mikuni VM22 carb along with aesthetics. When I have the bike pinned in 4th gear there is a strange vibration coming form the front, if I let off the throttle it seems to go away and if I give it a small amount of throttle again it seems to come back. Has anyone else encountered this issue before? Another bit of info is that my bike was shipped without the middle nut for the triple tree so I'm waiting for that to come in. Not sure what is causing the vibration though.
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05-15-2020, 10:57 PM	#2
RedCrowRides Join Date: Jun 2018 Location: Florida Posts: 759	i'd guess its the headlight fairing buzzing ,these engines arent counterbalanced and the plastics dont have rubber washers between them and the mounting points so they tend to get "buzzy" when you really run up the RPM's. Some foam tape or rubber washers will help fix that , of course it might be something else but since it goes away if you back off the gas even though you are still basically going the same speed, its likely being induced by engine vibration . __________________ 2001 Mustang GT 2004 Sportster 2018 VADER 2020 Orion RXB250L
	1

05-15-2020, 11:36 PM	#3
Biker_Andy Join Date: Oct 2016 Posts: 347	I'd get it up straight and have a real good look to make sure the alignment is good. If it's off enough to worry about you should be able to tell but the bike has to be upright. Then make sure every single bolt is tight. __________________ Electrician & Electronics Tech 2014 Honda CB500XA 2016 CSC TT250 1976 Honda CJ360T 2022 Honda Navi
	1

05-16-2020, 02:33 AM	#4
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 8,158	I Wouldn't even be riding a bike that didn't have the main center nut for the top triple clamp on. That doesn't just help hold the triple clamp on, but it also helps apply pressure to the nut under the top triple that holds tension on the steering stem bearings. __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124
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05-16-2020, 08:15 AM	#5
Ryandva Join Date: Apr 2020 Posts: 7	I work at an auto parts store and tried to find anything that I could throw on fora quick fix until the part comes in but its a strange thread pitch. But you're right and I wonder if the vibration at higher speeds is caused by the nut not being on.
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