KymcoForum.com

Scooters - 125 to 300 => Downtown 300 => Topic started by: Bdz on November 02, 2019, 06:45:33 PM

Title: Whistling sound when throttling
Post by: Bdz on November 02, 2019, 06:45:33 PM

Greetings all.
I just bought a 2nd hand DT 300i. My bad , didn’t check properly with the previous owner.
Can anyone advice on this problem I’m facing. Every time I throttle and move off, there’s this whistling sound, can’t really figure out where it came from. Once I close throttle or let the bike free run down slope, the whistling sound went off.
Is it the wheel bearings or something else I should check for?


Thank you all

Title: Re: Whistling sound when throttling
Post by: john grinsel on November 02, 2019, 08:49:17 PM

Check air cleaner and its installation/condition

Title: Re: Whistling sound when throttling
Post by: stuo on November 05, 2019, 09:54:35 PM

I vote for John's fix: whistling is air flowing over an edge. Remove the airbox and filter to see if it stops. Maybe just R and R-ing it will cure it.

Title: Re: Whistling sound when throttling
Post by: Bdz on November 06, 2019, 05:47:18 AM

Thank u John & stuo for the advice.
Will open up the air box and filter to check.

Title: Re: Whistling sound when throttling
Post by: stuo on November 21, 2019, 06:51:59 PM

Let us know the cause...and fix. We learn from each other.

Title: Re: Whistling sound when throttling
Post by: Yoni159 on January 05, 2020, 06:31:56 PM

Maybe its your rubber under you center stand . You have a circle rubble that protects the center stand to touch you engine take wd40 and spray that rubber its helped me before i had this problem too

Title: Re: Whistling sound when throttling
Post by: Bdz on June 16, 2020, 07:07:55 PM

Sorry for the overdue reply.
On top on the previous problem, I encounter squeaking sounds wheneva I ride over road humps.
First thought is the suspension.
But after checking throughout, realize it’s the main stand.

Yoni159 is right on. I spray wd40 on it and oiled the metal parts around the centre stand.
All is good now  :D

Title: Re: Whistling sound when throttling
Post by: stuo on June 16, 2020, 07:41:23 PM

Thanks for letting us know the source of the noise. I learned something today!