Diagnois - Honda Shadow Forums : Shadow Motorcycle Forum
 
LinkBack Thread Tools
post #1 of 8 (permalink) Old 08-11-2016, 03:36 PM Thread Starter
Member
 
GB6049's Avatar
 
Join Date: Nov 2006
Model: Shadow Spirit VT750 DC
Year: 2006
Location: Bethpage, Tennessee
Posts: 669
Garage
Diagnois

Thoughts and opinions... Riding to work a couple weeks ago I noticed the idle speed had increased about 400 rpms and the exhaust note was different. More of a rapid statico popping, especially noticeable when coasting down hill in gear. Did not do this before. First thing that came to mind was an exhaust leak or a vacumn leak. Checked and found nothing but the front cylinder carb A/F screw had a split o-ring. Bear in mind I replced the stock screws with longer ones. Over the last couple days I have noticed smoke coming from the rear cylinder exhaust. Smells like oil burning. Only noticable at idle and if I have idling at a light and take off, seems to be heavy at first. The valves have not been checked or adjusted since forever. I think the last time was back in 2009 and before that at the first check point when new in 2006. What are the chances I just need to adjust the valves? Other ideas? Still idles and runs fine.

GB6049 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 08-11-2016, 05:52 PM
Senior Member
 
Join Date: Apr 2008
Location: Palatine, IL
Posts: 10,917
I doubt a valve adjustment will help. I think you need to do a compression test. Oil doesn't get through misadjusted valves.

jpr1968 is offline  
post #3 of 8 (permalink) Old 08-12-2016, 12:42 AM
Senior Member
 
TenDollarBill's Avatar
 
Join Date: May 2013
Location: West Linn, Oregon
Posts: 3,192
Yup, burning oil in one hole is more serious than an idle screw or air leak. ^^^^ what Jpr said. Do a compression test. You may have a valve problem, but it's not what's causing the oil burning.
Did you do anything to the motor recently? Have you checked the oil level and does it need changed?



Life doesn't care if you're unprepared.
TenDollarBill is offline  
 
post #4 of 8 (permalink) Old 08-12-2016, 04:37 PM Thread Starter
Member
 
GB6049's Avatar
 
Join Date: Nov 2006
Model: Shadow Spirit VT750 DC
Year: 2006
Location: Bethpage, Tennessee
Posts: 669
Garage
Quote:
Originally Posted by TenDollarBill View Post
Yup, burning oil in one hole is more serious than an idle screw or air leak. ^^^^ what Jpr said. Do a compression test. You may have a valve problem, but it's not what's causing the oil burning.
Did you do anything to the motor recently? Have you checked the oil level and does it need changed?
Oil and filter change beginning of the season which was a disappointing less than 1500 miles ago. Not much riding this year due to weather and work. New intake and carb rejet over the winter but nothing else.
GB6049 is offline  
post #5 of 8 (permalink) Old 08-12-2016, 07:43 PM
Senior Member
 
Harryc's Avatar
 
Join Date: May 2014
Location: Upstate NY
Posts: 5,271
Quote:
Originally Posted by jpr1968 View Post
i doubt a valve adjustment will help. I think you need to do a compression test. Oil doesn't get through misadjusted valves.
^^^^^+1



"Stormy" 1997 Valkyrie Tourer - http://s724.photobucket.com/user/Har...eshow/Valkyrie

Ride Bell By OldDad
Harryc is offline  
post #6 of 8 (permalink) Old 08-12-2016, 09:19 PM
Senior Member
 
Gnarly's Avatar
 
Join Date: Jun 2014
Location: Resume Speed, KY
Posts: 3,352
My predecessors here have already nailed it.
Compression test; leak-down tester, if you have access to one.

Regardless, best of luck.

~~~Ride safe; ride smart....in memory of the one and only 7x~~~

The VT1100C2 ACEs: the '97 Flyin' Jenni, rescue dog Hobo LongNose, and the '96 on the right.

[IMG][/IMG]
Gnarly is offline  
post #7 of 8 (permalink) Old 08-13-2016, 01:13 AM Thread Starter
Member
 
GB6049's Avatar
 
Join Date: Nov 2006
Model: Shadow Spirit VT750 DC
Year: 2006
Location: Bethpage, Tennessee
Posts: 669
Garage
Not what I wanted to hear guys but it is also what I suspected. 😩 Neighbors friend has a shop that shouldn't have an issue working on a bike that is not stock since he races and can over come the language barrier. Hope to get it in next week after I return from a business trip to Helsinki and Tallinn.
GB6049 is offline  
post #8 of 8 (permalink) Old 08-13-2016, 07:42 AM
Senior Member
 
Join Date: Jun 2008
Location: SW Georgia Between Americus & Beuna Vista - Plains & Ellaville - Preston & Andersonville
Posts: 16,008
You ain`t overfilled the crankcase with oil???
Bad things happen when one does...
I`m Going Riding
See Ya,
D

`98 VT750 A.C.E.
Motorcycle Rider Rights Activist
ABATE member 40+yrs.
www.ABATEGA.org
(DC District 13)
www.mrf.org
www.MSF-USA.org
http://www.ama-cycle.org/
http://www.bikerrogue.com/Articles/Biker_Rights/History_of_Abate/history_of_abate.htm
Enjoying Life,D



"Captain D" is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda Shadow Forums : Shadow Motorcycle Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome