220 knock sound off idle
-
- Member
- Posts: 72
- Joined: 02:19 am Jan 23 2014
- Country:
220 knock sound off idle
recently picked up a 98 kdx 220 that i bringing back to life. it runs but the silencer on it was nothing but hollow. everything in it was gone. it was loud lol. i now have a stock silencer on it (much quieter) and i can hear a knock sound just off idle. it is not a continuous knock. if i quickly blip the throttle i can hear a single knock sound. or if if lug it i can hear it a couple of times. it needs a rejet done (on the rich side now) and it has a slight exhaust leak where the pipe goes in the cylinder. its not the kips. completely different sound. i take good care of my rides and have never experienced piston slap. will that sound like this or be a continuous sound? i have not looked at the top end and dont know how many hours are on it. i plan on a rebuild soon but just wondering about this sound.
-
- Supporting Member II
- Posts: 925
- Joined: 10:00 am Jan 04 2014
- Country:
Re: 220 knock sound off idle
I hope it's not a poison about to explode, like mine was.
- 6 Riders
- Gold Member
- Posts: 2124
- Joined: 12:58 pm May 01 2013
- Country: USA
- Location: Washington
- Contact:
Re: 220 knock sound off idle
He means piston! It sounds like your piston is about to (or has) let go. Don't run that bike until you get the jug off and inspect everything!ohgood wrote:I hope it's not a poison about to explode, like mine was.
newbbewb wrote:^what he said.
*side note...I'm drunk, so try to read what I'm trying to say, instead of what I actually typemasterblaster wrote:Man 6 riders you rock.
- Julien D
- KDXRider.net
- Posts: 5858
- Joined: 07:53 pm Nov 07 2008
- Country: USA
- Contact:
Re: 220 knock sound off idle
Being a 220, and a few years old, the first thing you need to do is pop the cylinder off and verify that you are not running the weak stock piston.
-
- Member
- Posts: 72
- Joined: 02:19 am Jan 23 2014
- Country:
Re: 220 knock sound off idle
thanks for the replies. i will be tearing the top end off in a couple of days. i will post what i find.
- JoKDX220r
- Gold Member
- Posts: 201
- Joined: 04:04 pm Oct 03 2008
- Country:
220 knock sound off idle
http://www.kdxrider.net/forums/viewtopi ... =77&t=9362
I already had this kind of noise in my engine if you click on the link I posted 2 videos about it..
good luck with that !!
I already had this kind of noise in my engine if you click on the link I posted 2 videos about it..
good luck with that !!
-
- Member
- Posts: 72
- Joined: 02:19 am Jan 23 2014
- Country:
220 knock sound off idle
when i tear the top end off i will be sure to check the play in the rod and the side crank bearings. thanks
-
- Member
- Posts: 72
- Joined: 02:19 am Jan 23 2014
- Country:
220 knock sound off idle
well i FINALLY got time to tear off the top end. OMG!!!!!! the piston is busted and the cylinder is trashed. i honestly dont see how it ran. i cant seem to find a good used cylinder anywhere so i need some help on who to send it to. i want to get it replated and possibly bored out.
BTW Thank God the crank and rod is in good shape
BTW Thank God the crank and rod is in good shape
-
- Supporting Member II
- Posts: 925
- Joined: 10:00 am Jan 04 2014
- Country:
Re: 220 knock sound off idle
jridinredneck wrote:well i FINALLY got time to tear off the top end. OMG!!!!!! the piston is busted and the cylinder is trashed. i honestly dont see how it ran. i cant seem to find a good used cylinder anywhere so i need some help on who to send it to. i want to get it replated and possibly bored out.
BTW Thank God the crank and rod is in good shape
man that's too bad. i ran mine for a while until I realized it was time. way past time
-
- Member
- Posts: 72
- Joined: 02:19 am Jan 23 2014
- Country:
Re: 220 knock sound off idle
man that piston looks brand new compared to mine lol. it was like this when i got it. i hate it when people wont do simple maintenance. its gonna cost me a fortune to get it fixedohgood wrote:jridinredneck wrote:well i FINALLY got time to tear off the top end. OMG!!!!!! the piston is busted and the cylinder is trashed. i honestly dont see how it ran. i cant seem to find a good used cylinder anywhere so i need some help on who to send it to. i want to get it replated and possibly bored out.
BTW Thank God the crank and rod is in good shape
man that's too bad. i ran mine for a while until I realized it was time. way past time
-
- Supporting Member III
- Posts: 1484
- Joined: 02:26 pm Jun 29 2005
- Country:
- Location: Alabama
Re: 220 knock sound off idle
Very cool. No blow by, eh?
Cylinders are easily repaired by the platers. Give a call to a couple of them
Cylinders are easily repaired by the platers. Give a call to a couple of them
'08 KTM200xc
'99 CR/KDX Hybrid with that RB stuff done to it
KX100 for the boy
'99 CR/KDX Hybrid with that RB stuff done to it
KX100 for the boy