ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-13-2012, 05:16 AM   #1
hemithis OP
n00b
 
Joined: Oct 2012
Oddometer: 9
XR650L running problems please help

I have posted my problem on supermoto junkie and thumpertalk with no real help. Time to try you guys.

About 3 weeks ago I jumped on my bike to go ride around town and hooligan it up some. Bike is supermotoed. About 5 mins into my ride in 3ed gear slight acceleration waiting on another rider the exhaust tone changes pitch. This is very hard to explain but it just sounded different all at once. I gagged the throttle bike pulled then started poping and sputtering. I pulled off the road and looked the bike over real quick nothing out of the normal. So I limped the bike home. If it is kept below about hafe RPM the bike runs and pulls fine. Dosnt matter if its hafe or full throttle. When holding WOT sitting still it sounds like its hitting a ignition cut revlimiter at about hafe RPM.

SO here is what I have dun. I held it wot and hit it with starting fluid to see if it was lack of fuel. No change in the motor at at.

I pulled and went through the carb twice cleaned and checked no problems.

I pulled the valve access holes on the head to check valve clearance the chain tench and the decompression mechanism all are good.

I checked the motor at TDC make piston is all the way up valves closed.

Checked compression. 150psi

Banged around my cdi with no results.

Pulled my stator cover and fly wheel to check for a spun key way. All is good.

Now I have ordered a cdi it just hasn't shown up yet but Idk if its guna help any. Im kindov at a loose on this thing right now. If any one can help at all please point me in the right direction.
hemithis is offline   Reply With Quote
Old 10-13-2012, 05:34 AM   #2
Switchblade315
Beastly Adventurer
 
Switchblade315's Avatar
 
Joined: Oct 2009
Location: personal hell
Oddometer: 4,752
my first thought was something went wrong with the choke but you say you've had the carb off twice and nothing is wrong there. Have you tryed a new spark plug? I know it sounds stupid but they can do odd things and it's probably due a new one anyway. And your pickup coil might have moved. dought it but possible.
__________________
When I die bury me upside down so the whole world can kiss my ass.

"My mind jumped off the high dive into the deep end of the gutter and took scuba gear with it" Me.
Switchblade315 is offline   Reply With Quote
Old 10-13-2012, 06:03 AM   #3
mcma111
Beastly Adventurer
 
mcma111's Avatar
 
Joined: Jul 2007
Location: San Francisco,Ca.
Oddometer: 10,645
Cam jump timing??
__________________
Steve in SF

BMW's
58 R26
79 R100s
91 R100gs

87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
mcma111 is online now   Reply With Quote
Old 10-13-2012, 06:58 AM   #4
africa twin
Gnarly Adventurer
 
Joined: Feb 2008
Oddometer: 178
Quote:
Originally Posted by hemithis View Post
I have posted my problem on supermoto junkie and thumpertalk with no real help. Time to try you guys.

About 3 weeks ago I jumped on my bike to go ride around town and hooligan it up some. Bike is supermotoed. About 5 mins into my ride in 3ed gear slight acceleration waiting on another rider the exhaust tone changes pitch. This is very hard to explain but it just sounded different all at once. I gagged the throttle bike pulled then started poping and sputtering. I pulled off the road and looked the bike over real quick nothing out of the normal. So I limped the bike home. If it is kept below about hafe RPM the bike runs and pulls fine. Dosnt matter if its hafe or full throttle. When holding WOT sitting still it sounds like its hitting a ignition cut revlimiter at about hafe RPM.

SO here is what I have dun. I held it wot and hit it with starting fluid to see if it was lack of fuel. No change in the motor at at.

I pulled and went through the carb twice cleaned and checked no problems.

I pulled the valve access holes on the head to check valve clearance the chain tench and the decompression mechanism all are good.

I checked the motor at TDC make piston is all the way up valves closed.

Checked compression. 150psi

Banged around my cdi with no results.

Pulled my stator cover and fly wheel to check for a spun key way. All is good.

Now I have ordered a cdi it just hasn't shown up yet but Idk if its guna help any. Im kindov at a loose on this thing right now. If any one can help at all please point me in the right direction.
It sounds like something is blocking the air intake under the seat. Did u mount anything under the seat change the seat cover etc. Try running it with the seat off to confirm.
africa twin is offline   Reply With Quote
Old 10-13-2012, 07:38 AM   #5
hemithis OP
n00b
 
Joined: Oct 2012
Oddometer: 9
Changed the plug when it first happend choke is fine.

The air intake is not stock its a round filer type now. I have run it open carb after putting the carb back on no change

And the cam chain is tight valves closed at TDC cam hasn't jumped.

:0/
hemithis is offline   Reply With Quote
Old 10-13-2012, 07:45 AM   #6
Kawidad
Beastly Adventurer
 
Kawidad's Avatar
 
Joined: Jul 2005
Location: Central Coast, Cal
Oddometer: 4,470
Drop a valve seat? These motors are famous for doing that and it doesn't always have to be instantly deadly.

http://advrider.com/forums/showthrea...4834&page=3167
__________________
Quis custodiet ipsos custodes? - Juvenal
(Who watches the watchers)
Kawidad is offline   Reply With Quote
Old 10-13-2012, 08:51 AM   #7
hemithis OP
n00b
 
Joined: Oct 2012
Oddometer: 9
Not much info on it. My motor starts and runs fine until about 3500 RPM.... makes good compression. You think a valve seat smacking around in the head would make noise.....
hemithis is offline   Reply With Quote
Old 10-13-2012, 09:53 AM   #8
hemithis OP
n00b
 
Joined: Oct 2012
Oddometer: 9
Cdi just shower up in the mail not that.

Barrowed a coil from another bike not that..... may just have to pay some one to look at it.
hemithis is offline   Reply With Quote
Old 10-14-2012, 09:35 AM   #9
Kawidad
Beastly Adventurer
 
Kawidad's Avatar
 
Joined: Jul 2005
Location: Central Coast, Cal
Oddometer: 4,470
Check the ignition pick up inside the case. You can test it with a multi-meter.

"GEN, IGNITION PULSE" Part # 30300-MY6-671

Mine died suddenly and without warning. I was completely baffled and had to take it to a shop to have it diagnosed.
__________________
Quis custodiet ipsos custodes? - Juvenal
(Who watches the watchers)
Kawidad is offline   Reply With Quote
Old 10-14-2012, 07:03 PM   #10
jrsride2002
Adventurer
 
jrsride2002's Avatar
 
Joined: Aug 2011
Location: Houston, Tx, USA
Oddometer: 82
Quote:
Originally Posted by hemithis View Post
Cdi just shower up in the mail not that.

Barrowed a coil from another bike not that..... may just have to pay some one to look at it.
Bummer, I was going to say coil....... Im stumped.
Sucks when you have to take it to someone. Costs 10's the amount it should be. And usually its something you might have over looked.

Good luck dude. Wish I knew, but for sure, I am going to follow this thread,
~Junior
__________________
'02 XR650L: Accerbis tank, motor mods, suspension mods, electronics mods
'02 DR650: Yamaha Raptor 660 petcock, everything else stock
jrsride2002 is offline   Reply With Quote
Old 10-14-2012, 07:38 PM   #11
bomber1965
Duel
 
bomber1965's Avatar
 
Joined: Jun 2007
Location: Rhode Island
Oddometer: 2,776
bomber1965 is offline   Reply With Quote
Old 10-17-2012, 03:47 PM   #12
hemithis OP
n00b
 
Joined: Oct 2012
Oddometer: 9
No tears in mine..... bike is at the dealer I finally just got feed up with fucking with it. Maybe I over looked something.... I will keep u posted.
hemithis is offline   Reply With Quote
Old 10-19-2012, 04:35 PM   #13
hemithis OP
n00b
 
Joined: Oct 2012
Oddometer: 9
So the bike was at the dealer for 3 days after them coming up with nothing and me being quite aggravated I payed them there 100$ and picked my bike up..... when I got home I decided to go after my first instincts witch was timing..... pulled the cam cover and the picture tells the rest of the story.
hemithis is offline   Reply With Quote
Old 10-19-2012, 09:54 PM   #14
Mike the Yank
Gnarly Adventurer
 
Joined: Jun 2012
Location: MILLJURAH Vic. Aus
Oddometer: 194
Question

excuse my ignorance, is that a really badly streched cam chain?
__________________
It's a lot easier to apologise than to ask permission
Mike the Yank is online now   Reply With Quote
Old 10-20-2012, 03:24 AM   #15
Sierra Thumper
Studly Adventurer
 
Joined: Oct 2012
Oddometer: 641
Thumbs down I hate inept shops...

So another fuk-up of a shop gets an easy $100 for doing nothing. Shops are worthless anymore...makes me so very glad I do all my own work and give them nothing....fukkers
__________________
"Don't get so concerned with the slab that you choose a turd for the dirt"- The Gospel as spoken by itrack
Sierra Thumper is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 04:15 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014