Autcom - Noise at low revs - SV650.org

20-04-09, 11:18 AM

I have an autocom system installed on the bike and everything has been working well, however yesterday I went out with the other half on the back and we were getting some very bad crackling/popping noises through the com plus at low revs it whines in time with the revs (But appears to go at higher speed) - All was working last time we were on the bike together, nothing has changed on the bike since.

20-04-09, 12:19 PM

Where is your Autocom Unit located?

20-04-09, 12:27 PM

Unit is located under the passenger seat - Unless of course it's slipped?

tigersaw · 20-04-09, 01:13 PM

Sounds a supression issue - could be cured by adding a supression choke, but it worked fine before you say so I'd check the installation over, pay attention to the earthing

Mark_h · 20-04-09, 01:44 PM

I had a bit of a problem with my Starcom too. I put it down to the Suzuki habit of a c15.5v charging voltage which is higher than the approved voltage for many devices. I used a regulated 12v supply which improved things a bit.

I still get the wining but far fewer clicks and weird noises. And everythign runs a lot cooler especially bullet cams.

Is it B2B autocom or R2P? Be interesting if it only fails when you have the weight of a pillion (not saying your missus is fat or anything) could be trapping something under the seat.

Do you have heated grips? Better/worse with them on?

If B2B try without pillion.

If R2P try talking with bike running but both standing next to the bike.

Could also be all sorts of Reg/Rec, generator, other random stuff.

I once had a dodgy headset that used to make the Starcom do all sorts of weird things but only after several hours.

TSM · 20-04-09, 02:00 PM

i had no real problems with mine, somtimes i had a wineing sound but that was because i had a audio cable running up past the rear cylinder, if you have a 15.5v then the regulator is not doing a proper job

which version of the starcom do you have?

20-04-09, 02:17 PM

Quote:

Originally Posted by TSM;Autocom Website FAQ

If you are bike powering an audio device, check that you are using an isolated lead to interface it to the system.
Unplug all accessories and see if the noise is still audible. If the noise has gone, plug one lead in at a time until the noise returns. You now know which lead is picking up the noise. It will either need re-routing or it is an incorrect lead.

From Autocom Website

Mr Speirs · 20-04-09, 02:25 PM

un-balanced cables would be the most likely cause most probable would be the microphone cable.

Mark_h · 20-04-09, 02:27 PM

Quote:

Originally Posted by TSM

..... if you have a 15.5v then the regulator is not doing a proper job

which version of the starcom do you have?

From the SV1000 manual ...........
Charging output (Regulated voltage) : 14.0 - 15.5 V at 5 000 r/m

Mine is a Starcom advanced although to be honest it's only half wired in.. Is more of a temporary thing that gets plugged in when needed.

Ref the balanced wiring, this is a problem if the device and the autocom are powered from there same source. Something to do with earth loop feedback. If you just have two headsets and/or a battery operated B2B radio I doubt this will cause a problem.

embee · 20-04-09, 06:22 PM

You might find some benefit from a clip-on ferrite (or 2) on suitable cables, like these

20-04-09, 11:18 AM	#1
Giffer2 Guest Posts: n/a	Autcom - Noise at low revs I have an autocom system installed on the bike and everything has been working well, however yesterday I went out with the other half on the back and we were getting some very bad crackling/popping noises through the com plus at low revs it whines in time with the revs (But appears to go at higher speed) - All was working last time we were on the bike together, nothing has changed on the bike since.

20-04-09, 12:19 PM	#2
The Guru Guest Posts: n/a	Re: Autcom - Noise at low revs Where is your Autocom Unit located?

20-04-09, 12:27 PM	#3
Giffer2 Guest Posts: n/a	Re: Autcom - Noise at low revs Unit is located under the passenger seat - Unless of course it's slipped?

20-04-09, 01:13 PM	#4
tigersaw Member Mega Poster Join Date: Mar 2005 Location: Llanwrtyd Wells Powys Posts: 1,146	Re: Autcom - Noise at low revs Sounds a supression issue - could be cured by adding a supression choke, but it worked fine before you say so I'd check the installation over, pay attention to the earthing

20-04-09, 01:44 PM	#5
Mark_h Member Mega Poster Join Date: Aug 2005 Location: Fleet, Hampshire Posts: 2,448	Re: Autcom - Noise at low revs I had a bit of a problem with my Starcom too. I put it down to the Suzuki habit of a c15.5v charging voltage which is higher than the approved voltage for many devices. I used a regulated 12v supply which improved things a bit. I still get the wining but far fewer clicks and weird noises. And everythign runs a lot cooler especially bullet cams. Is it B2B autocom or R2P? Be interesting if it only fails when you have the weight of a pillion (not saying your missus is fat or anything) could be trapping something under the seat. Do you have heated grips? Better/worse with them on? If B2B try without pillion. If R2P try talking with bike running but both standing next to the bike. Could also be all sorts of Reg/Rec, generator, other random stuff. I once had a dodgy headset that used to make the Starcom do all sorts of weird things but only after several hours. __________________ Don't want to be the quickest; don't want to be the best; just want to be the one having the most fun. XL125Varadero -> Curvy SV650N-Y -> SV1000N-K3 -> Multistrada 1200s Twin-tastic stuff. Minister for Sustainability *Aliquid prudentissimus delectabiles et intelligentes in adamasset lingua.*

20-04-09, 02:00 PM	#6
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	Re: Autcom - Noise at low revs i had no real problems with mine, somtimes i had a wineing sound but that was because i had a audio cable running up past the rear cylinder, if you have a 15.5v then the regulator is not doing a proper job which version of the starcom do you have? __________________ OTR: KTM 690 Duke R 2015 Full Akro SIDELINE: Kwak ZX636 A1P 2002, Red, R&G's, Yoshi, Double Bubble Screen GONE: Kwak ZX-7R P1, Full Akro, Undertray, Screen GONE: SV650S K2 Very Bruised & Without Fairing, Motovation Frame Sliders, R&G Ally Sprocket Toe Protector, HEL 2 Line Setup, GSXR K1 600 RWU Forks, Barnett Clutch & Springs, Penske 8981 Shock, Gilles Ti Rearsets, Steel Barends, Scottoiler, AFAM Chain & Sprockets, Twin FIAMM Horns, Skidmarx Bellypan, Full Micron Zeta Steel System, Cut down undertay. Forum Problems & Information / Site Suggestions

20-04-09, 02:25 PM	#8
Mr Speirs Member Mega Poster Join Date: Jul 2008 Location: Northampton Posts: 2,218	Re: Autcom - Noise at low revs un-balanced cables would be the most likely cause most probable would be the microphone cable. __________________ Smokey Black Burnty 02 - Racetech Smoulderlators + .90kg BBQ Springs, zx10r shockingly toasted, Conti Road Attacks heat up very nicely, R&G Crash Bungs but what f**king use are they, No Colour Matched Hugger, Flame Extenda, Beowulf Titainium Oval Flame Thrower.

20-04-09, 06:22 PM	#10
embee Member Mega Poster Join Date: Jul 2003 Location: Warwickshire Posts: 2,804	Re: Autcom - Noise at low revs You might find some benefit from a clip-on ferrite (or 2) on suitable cables, like these __________________ "Artificial Intelligence is no match for natural stupidity"

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