Very Loud Chirp

4636 Views 20 Replies 9 Participants Last post by Wild_Bill, Feb 27, 2015

Robotic

Discussion Starter · Feb 5, 2015 (Edited)

OK Guys,

2009 V2K. I have begun to experience a very loud chirp from the bike. It is loudest in gears 3,4,5, and only heard when driving with gears engaged. If I am going 70mph with loud chirp in 5th gear, chirp stops when pulling in clutch. Any ideas anyone before I go to dealer? Hard to tell where it is coming from while riding. Could it be from within gear case?

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Poncho Villa

· #2 · Feb 5, 2015

chirp has always been associated with a too loose belt when under load. assume you ruled that out? belt should be tighter than you would think. these are industrial grade belts can take the stress, but do not like to be loose. poncho

Robotic

Discussion Starter · #3 · Feb 5, 2015

OK, I have a dumb question. Isn't the belt still turning at 70MPH with clutch disengaged?

smedlin

· #4 · Feb 5, 2015

first things first....

You sir, keep holding out on pics of your bike.

I REALLY like what you have done.. how about posting more pics of it? From various views.

Second.

Your belt is chirping.

If the belt is to tight.. it chirps.

If the belt is to lose... it chirps.

If the wheel is not aligned (more tension on one side of then the other).. the belt chirps.

Some people HATE it does that.. but I view it kind like the bike is telling you something is wrong. Kind of like when your car brakes start to squeal...

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smedlin

· #5 · Feb 5, 2015

Robotic said:
OK, I have a dumb question. Isn't the belt still turning at 70MPH with clutch disengaged?

Yea, but there is no load on the belt..

Poncho Villa

· #6 · Feb 5, 2015 (Edited by Moderator)

2

No dammit! its not a Song Bird..

smedlin said:
Some people HATE it does that.. but I view it kind like the bike is telling you something is wrong. Kind of like when your car brakes start to squeal...

Ive owned, ridden, wrenched this bike for going on 8yrs. mostly never, no issues with belt chirp. if I did, it was resolved in short order. I swap out two rear wheels often(<15min) as I have one each fitted w/cartire and mc donut, depending upon what mood am in and where how I plan to ride.
2yrs ago, I swapped rears and took the RedBear'n to Why O'ming. I musta failed to adjust the belt accordingly as it waited till I was deep into the week and mountain terrain b4 starting its morning bird chirp song. It wasnt always there, but just enough to bug the living crap outa me and annoy, take away from the moments. I didnt bring my lift with me on the trip, so was reduced to adjusting the belt from underneath while fully loaded on side of the road.. did this several times.. still that annoying chirp was persistant.. would come and go depending upon how great the scenery was.. the more beautiful it was or the more I was Zenning out, then this Song Bird would chime in.. probably was getting in the moment and wanted to sing praises, etc..
back home, everyday ridding. not a chirp outa her..poncho

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07 buffalo

· #7 · Feb 6, 2015

Here is a couple of easy ways to get rid of the chirping...

Turn up the tunes if u have a stereo installed

Debaffel or install after market pipe

quit pulling the go stick so far

Big Dawg

· #8 · Feb 6, 2015

V2K noise video

Does it sound anything like this??

https://www.dropbox.com/s/v7ubxhdzwdw3x4i/P1020332.MOV

07 buffalo

· #9 · Feb 6, 2015

I didn't see but is it on a stand and in gear or is it in neutral? That is the exact sound mine makes under a load in any gear. A hard load.

Big Dawg

· #10 · Feb 6, 2015 (Edited)

On a dyno in 5th gear. gets bad around 50 then goes away at 60mph and comes back at 70 thru 73 or so.

07 buffalo

· #11 · Feb 6, 2015

If u figure the exact location and cause of the v2k squeal u probably will get a big slobbery kiss and bear hug from every one that ownes one of these beast!

Big Dawg

· #12 · Feb 6, 2015

I might pass on that kiss. But I'm going to do what ever it takes to get some answers. I just swapped engines to to see what would happen. Same noise at the same speeds.. Just not as bad as the first.. The mystery continues..

Poncho Villa

· #13 · Feb 6, 2015

Big Dawg said:
On a dyno in 5th gear. gets bad around 50 then goes away at 60mph and comes back at 70 thru 73 or so.

I told my doc that it hurts when I do this... he said "quit doing that"!
so 60 is not bad. just ride that speed.?

smedlin

· #14 · Feb 6, 2015

Big Dawg said:
Does it sound anything like this??

https://www.dropbox.com/s/v7ubxhdzwdw3x4i/P1020332.MOV

If you take off the 2 covers that "cover" the front belt pulley, does the noise get any louder?

Big Dawg

· #15 · Feb 7, 2015

I've ran with and without covers and did not notice any differance in the noise.

mark edward marchiafava

· #16 · Feb 7, 2015

some years ago, I had that chirping noise, kept trying to adjust the belt "just right."
Spent days fiddling with it, always trying to keep the belt in the center of the pulley, focused on the tension.
Once I let it ride slightly to the left, the chirping quit. It wasn't the tension as much as it was the alignment, it appears.

Big Dawg

· #17 · Feb 7, 2015

Well, i cant speak for Robotic's noise but mine is metal on metal. I elimanated the belt as a possibility long ago. Please view the video. and tell me if you disagree.

RoadToaster

· #18 · Feb 9, 2015

The belt squeal is the nature of the beast, no pun intended.

A while back a made a [email protected]$$ mistake put the real wheel back on with the spacer in the wrong spot and ate through two sets of bearings. Result of that i spun the spacers against the frame and ate in the frame a touch. Bought new spacers and so forth but, the new ones no matter how hard a torqued the axel nut down would still spin when i gotten into the torque. So i decieded to add a set of locking washers (special kind that is a set that grip really well) So that worked for that issue but created another it offset the whole rear wheel assembly over just ever so slightly, so if my wheel is out of square any bit the belt squeals because it is riding up on the side of the hub over so much.
Doing a little reaserch, plus i am a ME working for a OEM of large processing equipment, I found it is not the riding on the side that makes the squeal it is how it forces the cogged portion of the belt to enter and leave the pullies. One, to loose the front pully will squeal becasue the slack in the belt is causing the cogg to ride in its groove to long and then poping out on the top side of the pully. Two, to tight the back pulley will squeal from the bottom side of the pulley as the cogg leaves the pulley it is so tight it jumps ship prematurely, when it does it pops out. Lastly, and the most likley culprit, if the belt is out of square to either pulley it locks the coggs in tighter and they wont want to disengage so the ride around longer than supposed to then finally pop out with much force.

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GoodTimesRoller

· #19 · Feb 10, 2015

Good to read about this as I am not a fan of that belt music, though I've got used to it enjoying the bike anyway, loud pipes are handy too ..

The belt itself is quite wide, I believe this plays some role here while we are trying to synch both pulleys

How about using a bit less wide ones? Falcon or Gates seem to be good - 133T, 1.1/2'' ....so about 38mm (my belt is 40mm)

http://www.beltdrives.com/reardrbelt2.html

Robotic

Discussion Starter · #20 · Feb 21, 2015

Tightened the belt and that chirp went away. Big Dawg, it sounded just like yours. Sounds like metal on metal bur it wasn't.

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