Stalling after changing/awitching air filters? - Honda TRX Forums: Honda TRX 450R Forum
 2Likes
  • 1 Post By Ryan94Wright
  • 1 Post By hoser
 
LinkBack Thread Tools
post #1 of 6 (permalink) Old 08-30-2019, 09:28 AM Thread Starter
TRX90 Rider
 
Join Date: Jun 2011
Posts: 8
Stalling after changing/awitching air filters?

Got an 07 450er and it had a foam filter on it when I purchased last year and did'nt have any problems at all with bike but filter was old so i bought a new K&N as well as an outerwears filter cover for it. It has stock header with HMF silencer running with air box lid off and forget the main jet up larger than stock. After installing the new filter there is no performance issues accept it will stall often when slowing down from a hard run like stopping at the top of the dune or at the end of a mile race. Then it doesn't want to start, almost need to choke it to start it even when warm? Could it be running too lean with the new filer? Wouldn't have thought the change would make that big of difference.
wieland77 is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 08-30-2019, 12:46 PM
300EX Rider
 
Join Date: Dec 2008
Location: Quebec, Canada
Posts: 998
Did you forget a rag in the tube that goes to the carb like my buddy once did? Extreme example but look for any obstruction from the filter to the carb, did you fiddle with anything else?

05 trx450r

Full Sparks exhaust
CW 480cc cylinder
Venom 12.4:1 97mm piston / Balanced Honda revised crank
Stage 2 hotcam
CRF450 clutch / CR500 springs / Trinity cover
UNI filter
Cut airbox lid w/ outerwears
R&D Fuel screw (2 turns out)
Jetting : 185 Main, 50 pilot, HRC needle third clip
Fox FLOAT Evol shocks / Lonestar DC4 arms
Pro-taper bars / Fly grips / Powermadd guards
Moose bumper
Maxxis Razr tires

D3n1s is offline  
post #3 of 6 (permalink) Old 08-30-2019, 12:50 PM Thread Starter
TRX90 Rider
 
Join Date: Jun 2011
Posts: 8
I guess i should take the filter off just to make sure, you never know lol. Other than changing out the filter, nothing else was touched.
wieland77 is offline  
post #4 of 6 (permalink) Old 09-01-2019, 11:56 PM
250EX Rider
 
Ryan94Wright's Avatar
 
Join Date: Sep 2015
Location: Tucson Arizona
Posts: 318
Things I would check for.

1. Check to see if your Fuel Cap is venting properly.

2. Check the flow of the Petkock Valve by removing the fuel line off the carburetor and turn it on should be a very heavy flow.

If those 2 things test good then Take a small flat head screwdriver with you and ride it till it dies and as soon as it stalls loosen that carburetor bowl drain screw to see if any fuel comes out you wanna see fuel come out with a nice constant flow. There should be a Small flat head screw at the bottom of the carburetor bowl.


If there is no steady stream or it's just trickling/dripping then you could have a clogged fuel line input screen or float needs to be adjusted... which requires you to pull the carb and take the bowl off then remove the float needle and then blow the compressed air through the opposite way that fuel flows into the float needle seat.


Also there should b a small plastic piece around the main jet that looks like a little sombrero hat it keeps fuel cupped in the bottom of the carburetor so that way when you climb hills and such it has a small reservoir for fuel to say it to keep the bike from stalling.
hoser likes this.

Build Break Rebuild Better

Last edited by Ryan94Wright; 09-02-2019 at 12:01 AM.
Ryan94Wright is offline  
post #5 of 6 (permalink) Old 09-02-2019, 11:36 AM
Making HP ainít free. . .
 
hoser's Avatar
 
Join Date: Feb 2007
Location: Farmington, MN
Posts: 3,928
And it could just be as simple as adjusting the idle speed screw, make sure that it’s set properly. Personally I would ditch the K&N and throw a foam filter back on there.
Ryan94Wright likes this.
hoser is offline  
post #6 of 6 (permalink) Old 09-03-2019, 03:02 PM Thread Starter
TRX90 Rider
 
Join Date: Jun 2011
Posts: 8
Thanks for all the advice guys! Appreciate it
wieland77 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda TRX Forums: Honda TRX 450R 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