Raptor 250 decompression? - Yamaha Raptor Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 17 (permalink) Old 01-17-2010, 08:08 PM Thread Starter
Senior Member
 
Join Date: May 2009
Location: South suburb of Chicago
Posts: 675
Raptor 250 decompression?

Anybody out there running a high compression/300 kit on thier raptor 250 motor?I don't like the way my sons starts.If it is cold(30 degrees),it doesnt crank over.You push the start button and it just clicks like the battery is dead.Anyone have this problem and find a solution.I have heard the raptor 700 guys talking about a decompression valve and all the problems with them so I don't know if I should look into going that route or not.Right now I just aim the torpedo heater at it and warm the oil up a little bit and it starts cranking after pushing the button a few times.Any input would be appreciated.Thanks,Scott.

Mine-2004 yfz 450,Wifes-1995 Warrior,Daughters-2008 Raptor 250 all black se,sons-2008 Hetrick Racing mx prepped Raptor 250 , 2002 suzuki 50( just cant part with it yet,since both my kids learned to ride on it)
YFZ 77 is offline  
Sponsored Links
Advertisement
 
post #2 of 17 (permalink) Old 01-18-2010, 06:24 AM
Senior Member
 
twho's Avatar
 
Join Date: Dec 2009
Location: new castle pa
Posts: 608
get a new battery with more cranking amps or put a 24v system on it
twho is offline  
post #3 of 17 (permalink) Old 01-18-2010, 06:41 AM
I am unique

 
willykiller's Avatar
 
Join Date: Jun 2007
Location: Ottawa, Ontario
Posts: 22,612
Quote:
Originally Posted by YFZ 77 View Post
Anybody out there running a high compression/300 kit on thier raptor 250 motor?I don't like the way my sons starts.If it is cold(30 degrees),it doesnt crank over.You push the start button and it just clicks like the battery is dead.Anyone have this problem and find a solution.I have heard the raptor 700 guys talking about a decompression valve and all the problems with them so I don't know if I should look into going that route or not.Right now I just aim the torpedo heater at it and warm the oil up a little bit and it starts cranking after pushing the button a few times.Any input would be appreciated.Thanks,Scott.
Check your battery cable connections, and the battery..........


686 three plugger with HV porting, 39 FCRS, Curtis Sparks exhaust, Dyna FS CDI
willykiller is offline  
 
post #4 of 17 (permalink) Old 01-18-2010, 08:59 AM
Senior Member
 
edj3663's Avatar
 
Join Date: May 2009
Location: Vibbard Missouri
Posts: 347
There was a thread about this before. One guy on here can make a decompression valve in the head for them, ill try to find it.

Legallize it
edj3663 is offline  
post #5 of 17 (permalink) Old 01-18-2010, 09:02 AM
Senior Member
 
twho's Avatar
 
Join Date: Dec 2009
Location: new castle pa
Posts: 608
hope you find that im going with more comp and am thinking about going to 24v but this sounds like a good option also
twho is offline  
post #6 of 17 (permalink) Old 01-18-2010, 09:03 AM
Senior Member
 
edj3663's Avatar
 
Join Date: May 2009
Location: Vibbard Missouri
Posts: 347
edj3663 is offline  
post #7 of 17 (permalink) Old 01-18-2010, 11:30 AM
Senior Member
 
twho's Avatar
 
Join Date: Dec 2009
Location: new castle pa
Posts: 608
thanks so much. i pm'd him.
twho is offline  
post #8 of 17 (permalink) Old 01-18-2010, 06:12 PM Thread Starter
Senior Member
 
Join Date: May 2009
Location: South suburb of Chicago
Posts: 675
Quote:
Originally Posted by willykiller View Post
Check your battery cable connections, and the battery..........
Checked all connections and battery is new.I'm gonna look into the compression release.My brother in law works on harleys and that is what he suggested also.I don't have any experience with the compression release so i'm gonna do some homework 1st.Thanks Willy,Scott.

Mine-2004 yfz 450,Wifes-1995 Warrior,Daughters-2008 Raptor 250 all black se,sons-2008 Hetrick Racing mx prepped Raptor 250 , 2002 suzuki 50( just cant part with it yet,since both my kids learned to ride on it)
YFZ 77 is offline  
post #9 of 17 (permalink) Old 01-18-2010, 06:14 PM Thread Starter
Senior Member
 
Join Date: May 2009
Location: South suburb of Chicago
Posts: 675
Quote:
Originally Posted by edj3663 View Post
Thank you for finding that for me.I appreciate it.I'm gonna PM him now.Scott.

Mine-2004 yfz 450,Wifes-1995 Warrior,Daughters-2008 Raptor 250 all black se,sons-2008 Hetrick Racing mx prepped Raptor 250 , 2002 suzuki 50( just cant part with it yet,since both my kids learned to ride on it)
YFZ 77 is offline  
post #10 of 17 (permalink) Old 01-18-2010, 06:20 PM
I am unique

 
willykiller's Avatar
 
Join Date: Jun 2007
Location: Ottawa, Ontario
Posts: 22,612
Quote:
Originally Posted by twho View Post
hope you find that im going with more comp and am thinking about going to 24v but this sounds like a good option also

24 volt is not an option............


686 three plugger with HV porting, 39 FCRS, Curtis Sparks exhaust, Dyna FS CDI
willykiller is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Yamaha Raptor 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
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
01 raptor ticking noise decompression pin??? xxviperman32xx General 660 Discussion 3 07-29-2012 05:15 AM
03 raptor 660 decompression question skyfly44 General 660 Discussion 18 07-12-2011 07:52 PM
Raptor 250 & Raptor 250 SE question pmason718 Raptor 250 Discussion 1 11-19-2007 04:38 PM
Do i need the decompression thingymabob? Poweredbycoors Raptor 660 Modifications 9 01-05-2007 09:58 PM

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