[LordNikon]

Had a good search and can find no definitive answer on this so here it goes ...

After having the Alta installed today, at certain revs there is a distinct chirping/whistling at certain throttle loads this is very evident, but as the revs increase it goes ....

I have found the thread about the breather hose and that has been checked and is fine, however is this noise normal for the alta, or have I done something wrong

 

[Rich_IX]

Two of my homies (Scooby212 & NickB) have recently installed the Alta in there S's and I think the whistling is completely normal with it on...

 

[obehave]

Yep. Mine is just when you do a slight throttle input.

Oddly, now that I have v39.1 and a UniChip it does it less.

 

[LordNikon]

Thanks guys, thought I might have pinched a pipe or something during the install.

IT is only on little throttle inputs so I will class this as completely normal

 

[monkeynuts]

Dont worry mate we have same as rich says

we thought something wasnt tight enough or had a hole in it

but after we both fitted them and tested them the sound was the same

 

[Rich_IX]

I think the Whistling sounds cools