yamaha rhino 660 compression - Yamaha Rhino Forums - Yamaha UTV Forum

Yamaha Rhino General Discussions General discussions pertaining to the Yamaha Rhino.

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 03-15-2010, 02:01 PM Thread Starter
1/4 Throttle
 
Join Date: Feb 2010
Posts: 17
yamaha rhino 660 compression

So recently I thought since its winter might as well put a new piston and rings in my rhino considering I have never rebuilt the top end and i have had the rhino for 4 years! So i did a compression check before i tore it all down and the compression was 110psi! From what the shop manual says that's pretty low. So I replaced the stock 9:1 piston with a JE ll:1 piston kit, cleaned everything up and put her back together and readjusted the valves. I ran it light for about 20 minutes and took a compression reading and it says 140psi! This is still low if you go by the shop manual. Im thinking this could be a typo in the manual considering the cylinder was checked and it had barely any wear and the valves are adjusted correctly. Just curious if anyone knows the correct compression it is suppose to have? Thanks
devgru is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 03-15-2010, 03:43 PM
Wreckin' Shop
 
BiggJim's Avatar
 
Join Date: Jun 2008
Location: B-Town foooooo
Posts: 5,385
Quote:
Originally Posted by devgru View Post
So recently I thought since its winter might as well put a new piston and rings in my rhino considering I have never rebuilt the top end and i have had the rhino for 4 years! So i did a compression check before i tore it all down and the compression was 110psi! From what the shop manual says that's pretty low. So I replaced the stock 9:1 piston with a JE ll:1 piston kit, cleaned everything up and put her back together and readjusted the valves. I ran it light for about 20 minutes and took a compression reading and it says 140psi! This is still low if you go by the shop manual. Im thinking this could be a typo in the manual considering the cylinder was checked and it had barely any wear and the valves are adjusted correctly. Just curious if anyone knows the correct compression it is suppose to have? Thanks
The compression realease on the cam is probably giving you a funny reading also...Im sure you were due to freshen it up

BOOYAA

Juggstalk.net.....because we dont sell phone no MO!!
BiggJim is offline  
post #3 of 3 (permalink) Old 03-17-2010, 12:26 PM Thread Starter
1/4 Throttle
 
Join Date: Feb 2010
Posts: 17
Thanks alot
devgru is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Yamaha Rhino Forums - Yamaha UTV 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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55