electrical suppression

[Aladinsaneuk]

posting this here and a couple of other places as i am not an electrical type of chap

falco has had the following added:

Starcom1 (+ bluetooth adapter wired off the light circuit)
Garmin Zumo
HED headlight

now the sound system should be clear... but currently it isn't - its like i can hear each cycle of the engine... so bad i have been riding without the headset plugged in at all

the garmin and starcom are wired straight to the battery, HED wired into normal headlight circuit

so - this electrical noise - what do i need to suppress? I am not sure if the HT leads are original.....

any thoughts folks?

[D-Rider]

The noise will be from the ignition.

Your HID ballast operates at a much higher frequency.

First thing to check is that your plugs/plug caps are of the suppressor type (typically 5K resistor). They may just be old and need renewing.

I'm assuming the Starcom only picks up interference from your bike - not a lot of other sources too.

[Aladinsaneuk]

aye

just from the bike, nothing else

and let me guess, to replace the plug caps is an aprilia only part and no doubt has an unusual problem associated with it....

[D-Rider]

aye

just from the bike, nothing else

and let me guess, to replace the plug caps is an aprilia only part and no doubt has an unusual problem associated with it....

I don't think it needs to be Aprilia only - however the two long plug caps might be harder to source.
I'd swap the HT leads too on a bike the age of yours if you are beginning to get trouble.

I think that some time ago on AF1 I saw that Evolutione do some suitable HT leads and I'm pretty sure you'll be able to source some nearer to home.

Maybe someone on here has already swapped there's and knows a source.
Alternatively, give Griff a ring and see if he's got some he can suggest/source for you.

... and then post up where to get them from so we all know

[Renevator]

This link any help ?

http://www.motosportaprilia.com/Parts.a ... l%20system

Rene

[Aladinsaneuk]

same prices as aprilia yorkshire - and anyone else think that 20 quid a pop - after vat and delivery is a little steep for ht leads??

will call griff though :)

[D-Rider]

same prices as aprilia yorkshire - and anyone else think that 20 quid a pop - after vat and delivery is a little steep for ht leads??

will call griff though :)

Yeah I think that's expensive .... but I tend to think everything is expensive.

Though from what I can see, that's for EACH plug cap which, in expensiveness terms, means I'm going to have to go for a lie-down just to get over it.

[Aladinsaneuk]

his royal Griffness emailed me back with:

"dude i reckon its suspression issues your suffering .....some in line supressors should sort it i reckon......"

[D-Rider]

.... so he's basically saying the same thing then ..........

[Aladinsaneuk]

oh yes - but inline suppressors at a quid a pop are a lot cheaper than what it was for the HT leads.....

so you do not have to go for a lie down yet....

[D-Rider]

oh yes - but inline suppressors at a quid a pop are a lot cheaper than what it was for the HT leads.....

so you do not have to go for a lie down yet....

A quid a pop!
At 5,000 rpm a 4-stroke twin will be making 5,000 of those pops every minute .... start saving .........

[Aladinsaneuk]

Erm ... At 5000 revs a twin would make 10 000 pops and as we have four spark plugs I make it 20 000 pops per minute....

[D-Rider]

Nope - Fail.

A 4-stroke fires every 2 revolutions (unless it's running a wasted-spark ignition), and therefore a 4-stroke twin fires once per revolution.
Indeed we do have 2 plugs per cylinder but the coil discharge once for both of them, firing them at the same time .... so you'll just hear one pop of interference.

[Aladinsaneuk]

i might have sharp ears for a squirrel......