98 Grizzly 600 Mikuni carby - where should all the hoses coming off it connect to? - Grizzly Riders - Yamaha Grizzly ATV Forum

Grizzly Engine & Transmission Engine and transmission info here

 
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 09-19-2020, 01:57 AM Thread Starter
Member
 
Join Date: Sep 2020
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Question 98 Grizzly 600 Mikuni carby - where should all the hoses coming off it connect to?

I have a 1998 Yamaha Grizzly 600 YFM600FWA 4WV5-010 here which I believe has the Miknuni Corp BST40/1 4WV 00 carby. The bike is in some disrepair and has come to me not with starting and idling issues (I found the inlet valve clearances to be way out). While doing this I've observed that the air intake and carby setup has been fiddled with and seems to have been left with some items potentially not as they should be. The Service Manual provides limited guidance:




There are five hoses off the carby.


On the right side (right side being your right when sitting on the bike seat facing forward) there is two hoses:

A big black right angle hose (shown as number 1 Air vent hose in the bottom diagram). It goes to a hard plastic piece which seems to have a screen/filter inside it and then some melted foam. I wondered if this should actually connect up to the crank case breather?



near the bottom is a much smaller black hose with an adapter on the end to fit to a larger size.




On the left there is two hoses - both are shown in the second diagram above but not labeled or showing where they go to on the non-carry end:

The top on is an L-shaped black hose



The lower one is mid level on the carby and connects to an offset hose barb.




On the bottom there is:

One clear (old now yellowed) hose from the centre of the carb bowl. I believe this should just dangle down somewhere out of the way.




There is also:

The two black breather tubes running to this area from the rear diff and rear brakes



and the engine crank case breather tube:



Does the engine crankcase breather connect to the air filter housing lid?




Anyone able to advise what should go where please to help me out in reassembling this all correctly?
twr7cx is offline  
Sponsored Links
Advertisement
 
post #2 of 2 (permalink) Old 09-19-2020, 06:03 AM Thread Starter
Member
 
Join Date: Sep 2020
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by twr7cx, post: 85107, member: 19027
The lower one is mid level on the carby and connects to an offset hose barb.
I failed to state the obvious that this of course is the inlet for the fuel from the tank into the carby.
twr7cx is offline  
Reply

Bookmarks

Tags
600, carby, coming, connect, grizzly, hoses, mikuni

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Grizzly Riders - Yamaha Grizzly ATV 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











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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