Stupid Noob Question Coming... - Honda Shadow Forums : Shadow Motorcycle Forum
 
LinkBack Thread Tools
post #1 of 10 (permalink) Old 06-12-2019, 11:57 AM Thread Starter
Junior Member
 
Jim Carter's Avatar
 
Join Date: Jun 2019
Model: VT700C
Year: 1986
Location: Utah
Posts: 3
Garage
Stupid Noob Question Coming...

Let the hazing begin! So I have been unsuccessful in my search for a owners manual for my 1986 VT700C and that leads me to my stupid noob question of the day... How the hek does the choke or fuel enrichment circuit work? The shop manual talks about a bystarter valve opening when the choke is all the way up, does that mean that the choke is open all the way forward for normal operation?

I know... But first time rider and all...

Thanks

Attached Thumbnails
Click image for larger version

Name:	Capture.PNG
Views:	17
Size:	360.9 KB
ID:	263304  
Jim Carter is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 06-12-2019, 01:18 PM
Senior Member
 
Join Date: Feb 2012
Location: Vancouver BC
Posts: 2,772
Garage
The fuel enrichment circuit is exactly that: it permits more fuel than air to enter the carburetor. This makes starting a cold engine.easier and that is its only purpose. Basically the "choke" cable gas a plunger on the carb end. as you engage the choke the plunger is pulled out allowing more fuel. As the engine warms you are pushing the choke cable in and the plunger is closing the circuit.

I don't have that specific engine however you should be able to verify the correct lever position by starting the engine, letting it idle with no throttle, and trying choke open or close. When the lever is in the "start" position the rpms will be slightly higher. When in the operating position the rpms will be slightly lower. For you the "start" position will be UP / Open.

Remember when starting a cold engine to use full choke and NO throttle. When the engine is warm use NO choke and slight throttle.

G.

gdb069 is offline  
post #3 of 10 (permalink) Old 06-12-2019, 01:19 PM
Senior Member
 
Join Date: Aug 2017
Model: Shadow Spirit VT1100C A
Year: 2000
Location: Milford, Michigan
Posts: 2,288
Garage
Normal riding position would be down (Closed Position), and that is certainly not a stupid question!

Up (Open Position) for starting only when the motor is cold.


...

Last edited by Chuck_Michigan; 06-12-2019 at 01:21 PM.
Chuck_Michigan is offline  
 
post #4 of 10 (permalink) Old 06-12-2019, 07:08 PM
Senior Member
 
swifty2014's Avatar
 
Join Date: Oct 2014
Model: Vt750
Year: 1983
Location: Washington State
Posts: 10,621
Garage
Welcome to the forum. Questions are what it is all about when new people are leaning what we learned when we were new, and asked questions


The choke is actually a cable that pulls a plunger out of the enrichment hole and opens several drilling passages so extra fuel can be provided to start cold.


Here is a manual for a good price plus a parts guide with it.


https://www.ebay.com/itm/1986-1987-H....c100005.m1851
Attached Thumbnails
Click image for larger version

Name:	choke.PNG
Views:	6
Size:	227.0 KB
ID:	263330  

Only a biker knows why a dog sticks his head out of a car window.
1983 750 Shadow
From the past=
1951 Cushman scooter
1962 Honda 305 Dream
1965 Honda 305 Dream
1971 Honda 175 scrambler
swifty2014 is offline  
post #5 of 10 (permalink) Old 06-13-2019, 06:04 AM
Member
 
ShadowGeezer's Avatar
 
Join Date: Sep 2018
Model: VT700
Year: 1985
Location: West Coast Florida
Posts: 148
Garage
Quote:
Originally Posted by swifty2014 View Post
Welcome to the forum. Questions are what it is all about when new people are leaning what we learned when we were new, and asked questions

The choke is actually a cable that pulls a plunger out of the enrichment hole and opens several drilling passages so extra fuel can be provided to start cold.
We all get to learn here...
Also, the "choke" on these engines as described above is a bit "different" from the traditional butterfly valve choke you see on lawn mowers and ancient cars. You won't see anything internal move when using the choke lever and looking down the carb throats, like a butterfly opening and closing, because it is an internal set of enrichment ports.

If it jams, force it. If it breaks it needed replacing anyway.
ShadowGeezer is offline  
post #6 of 10 (permalink) Old 06-13-2019, 08:58 AM Thread Starter
Junior Member
 
Jim Carter's Avatar
 
Join Date: Jun 2019
Model: VT700C
Year: 1986
Location: Utah
Posts: 3
Garage
Now it is starting to make sense... Thanks!
Jim Carter is offline  
post #7 of 10 (permalink) Old 06-13-2019, 12:45 PM
Member
 
Derek86VT700C's Avatar
 
Join Date: Sep 2017
Posts: 88
Garage
Rebuilt my carbs and replaced floats, needle, jets, diaphragms... yadda yadda... now it starts cold on half a crank no choke. Previously it was an act of congress to cold start it.
Derek86VT700C is offline  
post #8 of 10 (permalink) Old 06-14-2019, 12:49 PM
Member
 
Kris Carr's Avatar
 
Join Date: Sep 2018
Model: VT500C
Year: 1984
Location: PG, BC, canada
Posts: 797
Garage
one of my enricher plungers broke off the cable, I pushed the plunger all the way into that port so it now only works on one carb. Turns out thats all it needs and starts just fine in low temps getting down near 0C. Thats what I love about Hondas

🏍
Kris Carr is offline  
post #9 of 10 (permalink) Old 06-15-2019, 04:09 AM
Member
 
shado#9's Avatar
 
Join Date: Jun 2013
Location: Mpls MN
Posts: 64
fuel enrichment ..not a choke lever ...one upside if u leave it engaged you just run rich .
shado#9 is offline  
post #10 of 10 (permalink) Old Today, 05:56 AM
Junior Member
 
Join Date: Jun 2019
Model: VT750c
Year: 2004
Location: Perth, Western Australia
Posts: 3
My choke is down the left side of the engine by the fuel switch.....

GingeeDom 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 post new threads
You may 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