Author Topic: C10 "buzz" question  (Read 553 times)

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Offline tdbru

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C10 "buzz" question
« on: August 12, 2019, 12:06:43 am »
hey guys, when i get on the throttle fairly hard passing stuff from 60 to 85 or so, i feel a lot of vibration.  not so much at a steady cruise.  i haven't sync'd the carbs in 3 years.  if the carbs have gotten out of sync, would that be enough of an issue to cause the noticeable engine vibration when accelerating hard?
thanks,
-tdbru

Offline connie_rider

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Re: C10 "buzz" question
« Reply #1 on: August 12, 2019, 12:16:38 am »
Check to ensure all the motor mount bolts are tight.

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Offline tdbru

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Re: C10 "buzz" question
« Reply #2 on: August 12, 2019, 03:55:56 am »
thanks.  i'll go check the motor mounts and see if they worked loose.
-tdbru

Offline Jim Snyder

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Re: C10 "buzz" question
« Reply #3 on: August 12, 2019, 04:28:55 am »
Best way to defeat handlebar buzz is get rid of the stock handlebars and convert to 7/8" bars. You will not believe the difference. Carb sync helps also.
"Some days you're the windshield, and some days you're the bug" Get used to it cause thats life !!!

Offline Gitbox

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Re: C10 "buzz" question
« Reply #4 on: August 12, 2019, 02:41:43 pm »
Quote
Best way to defeat handlebar buzz is get rid of the stock handlebars bike

^ there, fixed it  :)

Kinda kidding, but that was the only way I got rid of it. It's the nature of the beast. I tried a LOT of fixes and nothing really worked.
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Offline tdbru

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Re: C10 "buzz" question
« Reply #5 on: August 13, 2019, 02:43:59 am »
well, i'm sort of connected to my C10.  it ticks off all the boxes for me.  my happy compromise bike.  jack of all trades, master of none.  the new C14s are so very tempting, but i am not getting all i can out of my C10 yet, performance wise, since my skills are the limiter, not the bike, would a C14 make sense??  i can't ride either to their potential. 

maybe someday when my skills improve and my C10 becomes my limiter, then maybe a C14? 

so besides checking the motor mounts and syncing the carbs, i'll just run down the road with a big smile on my face on my old C10....
-tdbru

Offline works4me

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Re: C10 "buzz" question
« Reply #6 on: August 13, 2019, 11:43:56 am »
There may be other issues causing vibration.
Two things often overlooked, because we almost
always assume it’s the engine, are the steering stem
and front wheel bearings.
Loose, worn or damaged bearings can transmit
vibration to the handlebars.

Offline connie_rider

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Re: C10 "buzz" question
« Reply #7 on: August 13, 2019, 12:26:42 pm »
Buzz??   
   What "buzz"??   :41:

Ride safe, Ted
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Offline tdbru

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Re: C10 "buzz" question
« Reply #8 on: August 14, 2019, 01:51:55 am »
thanks for the suggestion.  i'll check the steering stem too.  i wouldn't think the wheel bearings.  i replaced them only 12000 miles ago with usa made Timken bearings.  but i suppose anything is possible...........
thanks again,
-tdbru

Offline Freddy

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Re: C10 "buzz" question
« Reply #9 on: August 14, 2019, 01:59:55 am »
Murph has gel grips which will virtually eliminate it - did so on mine, but his webpage seems to be down.
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Offline Mettler1

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Re: C10 "buzz" question
« Reply #10 on: August 14, 2019, 02:42:05 am »
The best item for me that reduced vibs was I sent my carbs to SISF for his carb spa and his expertise for setting up and  cleaning up my carbs. When I got them back and installed my C10 was the smoothest EVERY been. No more buzz!!  :) :)

    I WAS IMPRESSED!!  :great: :great: Really a sweet running C10 now!!! :beerchug:
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Offline tdbru

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Re: C10 "buzz" question
« Reply #11 on: August 14, 2019, 02:48:47 am »
thanks guys.  i just checked the motor mounts.  all tight. 40 ft. lb. 

i did send the carbs to SISF but just for overflow tubes. 

i still need to sync the carbs i suppose.  won't get that done before lava run but maybe before i put the bike away for the winter season??  or maybe i should just bite the bullet and take Thursday afternoon off of work and sync the carbs before the lava run... yeah!!

after i sync the carbs i'll report back.
thanks for all the suggestions.

-tdbru

Offline Freddy

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The best substitute for brains is ..............what?

Offline connie_rider

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Re: C10 "buzz" question
« Reply #13 on: August 14, 2019, 11:50:34 am »
I've used the grips Freddy posted on all the C-10's I've had and recommend them.
   https://www.murphskits.com/product_info.php?products_id=35&osCsid=sflwjaepoT7BxbC5zdMH33

Ride safe, Ted
« Last Edit: August 28, 2019, 09:02:12 pm by connie_rider »
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Offline Ranger Jim

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Re: C10 "buzz" question
« Reply #14 on: August 14, 2019, 12:23:31 pm »
When did you last adjust the valves?  I would suggest that every time you adjust the valves you sync the carbs.  I also recommend the grips from Murph. :great:
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Offline Rastus

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Re: C10 "buzz" question
« Reply #15 on: August 14, 2019, 04:43:15 pm »
You might also check your front fender. It has a few rivets that connect plastic to steel, and over time they become loose. Try wiggling the front lip of your fender. Any play will transfer to handlebar buzz. Just drill out the old rivets and replace with new ones. A couple extra rivets added will help also.

Offline tdbru

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Re: C10 "buzz" question
« Reply #16 on: August 15, 2019, 01:26:02 am »
thanks for the tip too about the front fender.  i'll check it.

i've got 3K to go to the next valve lash, if i recall.  i always re-sync the carbs after adj. the valve lash.  i "figured" that syncing the carbs at each valve lash check would be a correct schedule for that. 

i've got hotgrips on my C10 now, and that helps extend the riding season at least a month on both ends.  good tip about the gel grips, but i'd be concerned i'd have to give up the heated grips for cold rainy riding.

i just notice a big increase in vibration, in the foot pegs mostly, when i lay into the throttle.  just cruising, some buzz of course but not too bad.  hmmm.....  i'll go check the tightness on the exhaust system bolts...  maybe one of them is loose....

thanks COGr's
-tdbru

Offline Lee

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Re: C10 "buzz" question
« Reply #17 on: August 28, 2019, 08:19:18 pm »
I sync carbs on my c10 on the throttle. This instead of at idle. Was a PIA to do. Use whatever revs you like. Think I used 4K.

Took me sometime to get the hang of it and do it right after reading about process of debuzzing on an Australian site.

I linked to site in a discussion here on our site. Ask that it be a sticky. I thought the article was very comprehensive on C10 buzz relief. Best I had ever read in one place.

Offline Lee

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Offline tdbru

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Re: C10 "buzz" question
« Reply #19 on: August 29, 2019, 03:36:14 am »
thanks guys.  i'll be changing oil soon and will double check the clearance on the exhaust headers.
-tdbru