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 12-24-2012, 06:59 PM   #50551
ThumpnRed
Pig Wrangler
 
ThumpnRed's Avatar
 
Joined: Aug 2009
Location: Eye Duh Hoe
Oddometer: 1,607
Quote:
Originally Posted by mcma111 View Post
Your fucking killing me. Now I have to break out the camera and take the cam apart.

Hold on, it'll be a while.
I always wanted to see what the insides looked like. Now I wont have to tear my spare apart.
__________________
Quote:
Originally Posted by Cigar Mike :With plastic buy two.
'93 XR650L A few stock parts left...
ThumpnRed is offline   Reply With Quote
Old 12-24-2012, 07:15 PM   #50552
mcma111
Beastly Adventurer
 
mcma111's Avatar
 
Joined: Jul 2007
Location: San Francisco,Ca.
Oddometer: 8,168
XR/XRL Cam Decompressor Assembly





The above picture shows the spring and roller at the 2' position incorrectly. The roller should be on the other end of the spring. It fell apart and I installed it incorrectly.




The above picture shows the correct orientation of the rollers and springs.




__________________
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 12-24-2012, 08:10 PM   #50553
Spud Rider
Beastly Adventurer
 
Spud Rider's Avatar
 
Joined: Jun 2008
Location: Idaho
Oddometer: 3,000
Thanks for posting the great photos, Steve.

Pages 9-7 and 9-8 of the new Honda Common Service Manual describe how the automatic decompression system works.



This information is not available in the old version of the Honda Common Service Manual.

It appears the decompression cam will be held in place on the camshaft by the spring pressing it away from the camshaft. However, if the camshaft is tilted downward, the one-way roller bearing and the reverse decompression cam could fall off the end of the camshaft after the cam sprocket collar is removed.

Spud
__________________
2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil

Spud Rider screwed with this post 12-24-2012 at 08:16 PM
Spud Rider is offline   Reply With Quote
Old 12-24-2012, 11:25 PM   #50554
RZRob
Studly Adventurer
 
RZRob's Avatar
 
Joined: Dec 2008
Oddometer: 697
Above & Beyond

Steve, Man you are awesome! So I wasn't worried about the 3 Decompressor springs, but rather that one that slid into the cam perpendicularly with a pin too. So was it like that spring was super light tension? That last picture was gold! Looks like I have that right. I'm suspicious of that o-ring on the pump now. I definitely put it in, but it was tattered. Something's making it a tad rattly up top.

This is why I love my XRL. It's the people!

Merry Christmas fellow BRPers!

RZ Rob
RZRob is offline   Reply With Quote
Old 12-24-2012, 11:40 PM   #50555
Spud Rider
Beastly Adventurer
 
Spud Rider's Avatar
 
Joined: Jun 2008
Location: Idaho
Oddometer: 3,000
Merry Christmas, everyone!

Spud
__________________
2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil
Spud Rider is offline   Reply With Quote
Old 12-25-2012, 04:54 AM   #50556
Schultz!
Recovering Lurker
 
Schultz!'s Avatar
 
Joined: Nov 2012
Location: Warren Michigan
Oddometer: 80
Quote:
Originally Posted by Spud Rider View Post
Merry Christmas, everyone!

Spud

+1
__________________
lots of dismantled parts to a 2007 XR650L
Schultz! is offline   Reply With Quote
Old 12-25-2012, 06:07 AM   #50557
MentalGuru
Crazy Diamond
 
MentalGuru's Avatar
 
Joined: Aug 2011
Location: Mental Ward
Oddometer: 726
Merry Christmas










__________________
Praise the Lord!!! I have seen the light!!! He has shown me the promised land!!! TT for now...
MentalGuru is offline   Reply With Quote
Old 12-25-2012, 06:30 AM   #50558
selkirkswamper
hellbilly
 
selkirkswamper's Avatar
 
Joined: Apr 2012
Location: Selkirk, NY
Oddometer: 116
MERRY CHRISTMAS one and all !!!

selkirkswamper is offline   Reply With Quote
Old 12-25-2012, 06:31 AM   #50559
fritzcoinc
Enjoying my last V8
 
fritzcoinc's Avatar
 
Joined: Apr 2008
Location: Cypress, Tx
Oddometer: 5,415
Merry Christmas everybody!

__________________
Regards
Fritzcoinc
96 XR650L, 96 Guzzi Sport, 07 BMW K1200GT,
86 Husky 400 XCE, 03 Harley Road King Police, 00 Husky Te 610 e, 1999 Husky TC610 SM, Google: TX7
fritzcoinc is offline   Reply With Quote
Old 12-25-2012, 06:59 AM   #50560
mcma111
Beastly Adventurer
 
mcma111's Avatar
 
Joined: Jul 2007
Location: San Francisco,Ca.
Oddometer: 8,168
RZRob,

Spring #6 can become a problem when it loses it's tension. My son's bike would not start when cold and I found that the engine would rotate around to TDC with a pressurized cylinder and not be able to get past TDC due to the decom not opening the right exhaust valve. I finally replaced that little spring and the engine would start normally again. I have a buddy's bike that is doing the exact same thing and we will be replacing the spring this coming week.

__________________
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 12-25-2012, 08:23 AM   #50561
therealbigman
bout a dollar 3.98
 
therealbigman's Avatar
 
Joined: Jul 2010
Location: Texas Gulf Coast
Oddometer: 3,068
Merry Christmas Yall , .
__________________
Marko

08 xr650l 99 xr650l 84atc200s 85atc200s 80ct110 99xr70 04xr50 85atc70 87trx70

Dumb ass people do dumb ass things
therealbigman is offline   Reply With Quote
Old 12-25-2012, 08:35 AM   #50562
Wattner
Beastly Adventurer
 
Wattner's Avatar
 
Joined: Oct 2003
Location: Ft. Lauderdale, Florida
Oddometer: 2,775
Amen friend.... Being from Texas, isn't it All Y'all????

Merry Xmas to all!!!!!!
Wattner is offline   Reply With Quote
Old 12-25-2012, 08:43 AM   #50563
snofrog
Studly Adventurer
 
snofrog's Avatar
 
Joined: Aug 2006
Location: Petersburg Mi 49270
Oddometer: 560
I am considering an XRL for its off road bias . Being air cooled, is it ever an issue with heat and riding slowly or idling ? thanks , Mark
__________________
08 Yamaha Fz-1
87 Yamaha Xt-600
soon I will own a dirty bike with a button instead of a lever
snofrog is offline   Reply With Quote
Old 12-25-2012, 08:59 AM   #50564
EsconDeasy
Ectomorph
 
EsconDeasy's Avatar
 
Joined: Feb 2007
Location: Phoenix, AZ
Oddometer: 1,095
Mine seems to run cooler at lower speeds.......perhaps my jetting is biased towards richer mixtures at lower throttle openings. Loads on the engine result in the highest temps for me. I am running dave's mods with the leanest recommended jets: 52/158 if I recall.
I have gone into the garage after a spring ride to hear the gas boiling in the gas tank (IMS 4.0)

I personally don't think additional finning or oil coolers are necessary on this bike as long as you take reasonable precautions to keep the bike cool. before I bought mine, the PO ran it 65 mph up Black Canyon hill on I17 year round and didn't frag the engine....that was with stock jetting
EsconDeasy is offline   Reply With Quote
Old 12-25-2012, 09:35 AM   #50565
Spud Rider
Beastly Adventurer
 
Spud Rider's Avatar
 
Joined: Jun 2008
Location: Idaho
Oddometer: 3,000
Quote:
Originally Posted by mcma111 View Post
RZRob,

Spring #6 can become a problem when it loses it's tension. My son's bike would not start when cold and I found that the engine would rotate around to TDC with a pressurized cylinder and not be able to get past TDC due to the decom not opening the right exhaust valve. I finally replaced that little spring and the engine would start normally again. I have a buddy's bike that is doing the exact same thing and we will be replacing the spring this coming week.

Thank you for posting the valuable information. That spring makes the decompression cam rotate counterclockwise at engine speeds less than 800 rpm, engaging the right exhaust valve. When the engine is running (with speeds greater than 800 rpm) that spring is compressed by centrifugal force, and the decompression cam rotates clockwise, disengaging from the right exhaust valve. That decompression spring costs less than $2. Therefore, I now plan to replace that spring with a new one every time I remove the camshaft for any reason.



Spud
__________________
2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil
Spud Rider 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 06:33 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011