Honda Motorcycles - FireBlades.org - Reply to Topic
Yamaha Motorcycles Discussion of Yamaha Motorcycles.

Thread: Thermo wax opeation Reply to Thread
Title:
Message:

Register Now



In order to be able to post messages on the Honda Motorcycles - FireBlades.org 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
A valid e-mail address is REQUIRED. You will not have access to any site features until you activate your account using the activation e-mail that is sent to this address.

Email Address:
OR

Log-in










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
12-19-2008 1:42 PM
denzee
Re: Thermo wax opeation

It controls idle speed by bypassing air around the throttle plates the same as all cars do now. The wax thermal valve when cold, mechanically lifts the idle air control valves (IAC) off their seats slightly allowing air to bypass and increase engine idle. When it warms from the coolant, they return.

Cars basically do the same thing except the IAC is commanded to open by the ECM based on other sensors like air temp and coolant temp. The bike version is much more basic.
12-19-2008 12:44 PM
paully
Re: Thermo wax opeation

maybe through expansion and contraction it regulates the idle
12-10-2008 7:48 PM
Doomwitha929
Re: Thermo wax opeation

Yeah I saw something like that. We have these on some of our cars and trucks at Nissan but they do not function in the exact same way. I understand the mechanics behind how a thermo wax pellet works the question is exactly how it is operation on this bike and what it does. I get that it effects idle but how it is doing that and in what way I can't find out.
12-10-2008 7:08 PM
D.Nac
Re: Thermo wax opeation

thermo wax device - mechanical device containing wax that melts at a specified coolant temperature and extends a rod controlling warmup idle.

It appears to be a wax motor of sorts. See here Wax motor - Wikipedia, the free encyclopedia
12-10-2008 7:03 PM
Doomwitha929
Thermo wax opeation

OK, I am posting this here because apparently no one on the entire R1 forum knows anthing about this thing or what it does. I believe other makes probably use the same thing but I do not know.
I have an 05 R1 and attached to the throttle bodys is something called a thermo wax. It is an actuator that coolant runs through and probably has something to do with idle speed although thanks to the lack of info or proper explinations in the yamaha manual I have no idea how exactly it works.
I want to know because if possible I am going to remove it totally and do away with some coolant hoses.
If anyone knows anything about this please fill me in.

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

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