|
|
Item Posts
Sort Order
|
|
|
YZ85 Very loud knoking noise - PLEASE HELP
|
_YZ85_
User
| Posts: 71
| Joined: 07/09
Posted: 09/21/09
10:46 AM
|
|
Ok, so for about 2weeks 4th, 5th, and 6th have been sticking on my lil brothers yz. But for some reason, today when he as on it he was shifting without the clutch and also keeping it pinned  . But when he pulled the cluth; shifting from 6th to 5th, an extremely loud knocking noise started. The bike still starts and I think he sed it was still pulling with the noise.
Please help
Alex.
----------
04 YZ85
07 CR250
07 CRF450r
|
|
|
|
_YZ85_
User
| Posts: 71
| Joined: 07/09
Posted: 09/21/09
11:17 AM
|
|
Anybody???
----------
04 YZ85
07 CR250
07 CRF450r
|
|
|
|
_YZ85_
User
| Posts: 71
| Joined: 07/09
Posted: 09/21/09
12:05 PM
|
|
Bump
----------
04 YZ85
07 CR250
07 CRF450r
|
|
|
|
|
|
_YZ85_
User
| Posts: 71
| Joined: 07/09
Posted: 09/21/09
01:13 PM
|
|
If anyone can help - please do!
----------
04 YZ85
07 CR250
07 CRF450r
|
|
|
|
pojp58
Addict
| Posts: 6212
| Joined: 04/07
Posted: 09/21/09
05:19 PM
|
|
Not sure yz. Is the noise only when you shift or dose it continue after the shift and dose it shift hard just before it starts making the noise?
---------------------------
 I love this dirt stuff.
|
|
|
|
_YZ85_
User
| Posts: 71
| Joined: 07/09
Posted: 09/21/09
11:48 PM
|
|
He said it was hard to shift 5th/6th but it also does it in neutral!
----------
04 YZ85
07 CR250
07 CRF450r
|
|
|
|
pojp58
Addict
| Posts: 6212
| Joined: 04/07
Posted: 09/22/09
03:16 AM
|
|
You might have him check the Shift Cam and Forks then.
YZ85
---------------------------
I love this dirt stuff.
|
|
|
|
DLHamblin
Administrator
| Posts: 4205
| Joined: 03/05
Posted: 09/22/09
06:15 AM
|
|
 _YZ85_:
Ok, so for about 2weeks 4th, 5th, and 6th have been sticking on my lil brothers yz. But for some reason, today when he as on it he was shifting without the clutch and also keeping it pinned . But when he pulled the cluth; shifting from 6th to 5th, an extremely loud knocking noise started. The bike still starts and I think he sed it was still pulling with the noise.
Please help
Alex.
So he has had an issue for two weeks and kept riding till now its a major issue?? Bad decision. 
Based on his shifting methods I'd say he has broken a gear dog or two.
Now with that noise he was still riding???
Drain the tranny oil and look for metal shavings or pieces.
Either way it looks like the cases will need to be split to see what is broken.
.
Dave H 2006 YZ250
(2008 YZ 125 son)
|
|
|
|
yzwoods
Addict
| Posts: 18457
| Joined: 05/06
Posted: 09/22/09
07:43 AM
|
|
Well, None of this is going to be good. That noise is either bad pre detonation or your piston slapping the head! Bad crank, etc...That moter needs to come apart.
And do not ride it till you do!
-------------------
DIABETES SUX!
|
|
|
|
_YZ85_
User
| Posts: 71
| Joined: 07/09
Posted: 09/22/09
07:49 AM
|
|
I agree, i would never ride if I thought something was wrong; however small but he didn't tell us any of this until this knocking noise started!!!
He said he rode about 10yards then 'noticed' it.
Just drained the oil and it is clean - not black/milky and has NO metal at all!
I took the clutch cover off (and removed the cluth)to find there there was a circlip lying in the bottom of the case. It was from the sprocket that the kick start engages into, obviously it hadn't been installed/installed correctly therefore that was wobbly.
Thank-you everyone for your help
Really don't know where to go from here!!
----------
04 YZ85
07 CR250
07 CRF450r
|
|
|
|
yzwoods
Addict
| Posts: 18457
| Joined: 05/06
Posted: 09/22/09
07:52 AM
|
|
PULL THE TOP END!
-------------------
DIABETES SUX!
|
|
|
|
yzwoods
Addict
| Posts: 18457
| Joined: 05/06
Posted: 09/22/09
07:54 AM
|
|
You need to check your piston and crank before running the bike. JMO.
-------------------
DIABETES SUX!
|
|
|
|
_YZ85_
User
| Posts: 71
| Joined: 07/09
Posted: 09/22/09
08:03 AM
|
|
Thanks woods - will do that this afternoon.
----------
04 YZ85
07 CR250
07 CRF450r
|
|
|
|
|
Posted: 09/22/09
08:24 AM
|
|
and if your not sure if the piston and head are ok, take some pics and we can tell ya,  but i hope you didnt break the crown of the piston, crank, or anything. 
--------------------
Autismspeaks.org check it out
--------------------
life in the fast rut!!!!
--------------------
my rides- 2008 yz250f fully modified, use to be j-laws bike
&
IT400 1979 yamaha!!!
--------------------
Home: SO CAL
|
|
|
|
_YZ85_
User
| Posts: 71
| Joined: 07/09
Posted: 09/22/09
08:32 AM
|
|
Thanks will do. Yeah, hope so to!
----------
04 YZ85
07 CR250
07 CRF450r
|
|
|
|
|
|
|