Yamaha Sport ATV Forum

2001 Yamaha Warrior valve question

This is a discussion on 2001 Yamaha Warrior valve question within the Yamaha YFM350 Raptor/Warrior ('87-Present) forums, part of the Performance /Technical category; I just bought my son a 01 warrior and it seems to run fine. But there sounds like to be some valve noise. What all ...


Go Back   Yamaha ATV Forum > Performance /Technical > Yamaha YFM350 Raptor/Warrior ('87-Present)

Reply
 
LinkBack Thread Tools Display Modes
Old 10-08-2008, 04:51 PM   #1
Junior Member
 
Join Date: Oct 2008
Location: Chattanooga,TN
Posts: 18
View cokeman277296's Photo Gallery(0)
Default 2001 Yamaha Warrior valve question

I just bought my son a 01 warrior and it seems to run fine. But there sounds like to be some valve noise. What all tools is need to adjust these besides a feeler gage?
cokeman277296 is offline   Reply With Quote
Old 10-08-2008, 09:16 PM   #2
Junior Member
 
07350R's Avatar
 
Join Date: Oct 2008
Location: United Communist States of America
Posts: 29
View 07350R's Photo Gallery(5)
Default

Does it have an after market header? An aftermarket header will reveal every noise in the motor, I don't think they are as thick as the stocker, if not its just Remove the front plastic and fuel tank and then its just the feeler guage and an allen wrench, large flat head screw driver for the timing caps on the flywheel cover, spark plug socket.
__________________
-2012 TTR230.
-2013 350 Raptor.
-2007 CRF50
07350R is offline   Reply With Quote
Old 10-12-2008, 10:29 PM   #3
Junior Member
 
mtwolffo's Avatar
 
Join Date: Oct 2008
Location: Baytown Texas
Posts: 7
View mtwolffo's Photo Gallery(0)
Default

Does this bike have the stock cam in it? I know when you run a performance cam with a higher valve lift you will hear more valve noise due to more valve train movement.

But, I would for sure open the valve covers and look around and see if there is anything that has broke or come loose. At the same time go ahead and adjust your valves it wont hurt if you do.

Intake 0.06-0.10 cold

Exhaust 0.16-0.20 cold

If do all of this and there is still valve noise, then we need to look at the two bearings that support the camshaft in the head. The inner bearing is a roller style bearing and the outer bearing is a ball style. If either of these bearings are getting bad, they will surly let you know with high heat and noise. The cam can be pull out of the head without removing the head.

If you do so, note the timing marks on the cam sprocket and also the cam sprocket bolt need to be torqued to 43 inch pounds. Be sure to use a strong magnet to remove the cam sprocket timing pin, the timing is behind the cam sprocket bolt and washer. Also the timing pin is very small and can be easily drop down the cam chain valley. Be careful and take your time on this step.

TW
mtwolffo is offline   Reply With Quote
Old 10-18-2008, 05:46 PM   #4
Junior Member
 
Join Date: Oct 2008
Location: Chattanooga,TN
Posts: 18
View cokeman277296's Photo Gallery(0)
Default

Ok I did exactly like the manual said. I aligned the T on the crankshaft and the and the line exactly. I put the intake at 0.06 and the exhaust at 0.16. GOt it all back together and started it up and it sound like a gaint sewing maching. It sounds horrible. What did I do wrong casue I know its not suppose to sound like that?
cokeman277296 is offline   Reply With Quote
Old 10-18-2008, 07:08 PM   #5
Junior Member
 
Join Date: Oct 2008
Location: Chattanooga,TN
Posts: 18
View cokeman277296's Photo Gallery(0)
Default

oopps

Last edited by cokeman277296; 10-19-2008 at 01:12 PM.
cokeman277296 is offline   Reply With Quote
Old 10-19-2008, 07:12 PM   #6
Junior Member
 
mtwolffo's Avatar
 
Join Date: Oct 2008
Location: Baytown Texas
Posts: 7
View mtwolffo's Photo Gallery(0)
Default

Do you know if the cam is the stock cam? If it is then, it should run very quite. I know for a fact, if you run a higher performance cam other than the stock one you will hear more valve noise for sure due to more valve movement.

One of the biggest mistakes I see people do is install a high performance cam and do nothing to the valves. The stock valves springs will not handle the higher lift of a "hotter cam".

Are you sure that the valves are the problem? Did you check the cam support bearings?
__________________
2005 Yamaha 350 Raptor. Powroll 365 kit, 430 cam, 1mm over valves, custom intake, 111 race fuel. Not red neck built!
mtwolffo is offline   Reply With Quote
Old 10-20-2008, 11:25 PM   #7
Member
 
Join Date: Aug 2007
Posts: 72
View sharpie69's Photo Gallery(0)
Default

Tools you need:

4mm allen wrench ( to remove tank cover and whatnot )
10mm socket or gear wrench to finish removing gas tank.
5mm allen wrench to remove valve covers.
10mm again gear wrench preferably to loosen jamnut on rocker arm.
I believe a 4mm to tighten/loosen the adjuster that the jamnut is on.
You obviously already know you need feeler gauges for this job.
I think an 8 or 10mm socket/gear wrench again to remove side cover/pull starter.
and last but not least either a 17 or 19mm (think its 17) to turn the crank bolt to get your engine TDC.

All this is to the best of my knowledge I havent owned a warrior in a few years but this is what i can remember so far. Good luck. BTW I had a hotcam and when adjusted to their .004-.006 intake, .006-.008 exhaust settings, it was VERY noisy. Local engine builder told me .002-.003 int.......003-.004 exh. and it ran excellent.
sharpie69 is offline   Reply With Quote
Old 10-21-2008, 07:30 AM   #8
Junior Member
 
07350R's Avatar
 
Join Date: Oct 2008
Location: United Communist States of America
Posts: 29
View 07350R's Photo Gallery(5)
Default

Make sure you used the right feeler guages reading mm. I usually take the timeing cap off and the spark plug out and put your finger over the spark plug hole and rotate the motor CCW until the compression pops your finger off of the spark plug hole that way you know you are at Top Dead Center of the compression stroke, you will be able to see the mark on the flywheel through the hole or be very close, enough to line it up exactly, then you will be good to go adjusting the valves.
__________________
-2012 TTR230.
-2013 350 Raptor.
-2007 CRF50
07350R is offline   Reply With Quote
Old 10-26-2008, 10:20 AM   #9
Senior Member
 
Join Date: May 2005
Posts: 297
View Jasonp's Photo Gallery(0)
Default

Yeah make sure your on the right stroke TDC compression.
Make sure you have the correct feeler gauge. NOT .10" which you would have all sorts of clearance.
I would try .003-004" intake, .004-005" exhaust. Rotate the engine once and check again to verify.
__________________
1998 Warrior. JE 366cc, Mega .450", HD TI valve springs, DR P&P head, DR flywheel, KW SS Oversized valves, TM36-68 Carb, Dyna DFS7P, HD Barnett clutch springs, Earl's custom oil cooler/big bear setup. AC Bumpers, Holeshot's with .190 rims.
Jasonp is offline   Reply With Quote
Old 10-26-2008, 11:09 AM   #10
Junior Member
 
Join Date: Oct 2008
Location: Chattanooga,TN
Posts: 18
View cokeman277296's Photo Gallery(0)
Default

Thanks for all the replys. I finally got it done and sounds alot better then it did.They where defintly in need of adjusting. Thanks again, or rather my son thanks you.
cokeman277296 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Yamaha ATV Forum > Performance /Technical > Yamaha YFM350 Raptor/Warrior ('87-Present)


Search tags for this page

2001 yamaha warrior valve adjustment

,
how to remove the valves from a yamaha warrior 350
,
valve adjustment 01 yamaha wolverine
,
2001 yamaha 350 warrior
,
how to adjust valves on a 98 yamaha warrior
,
stock valve lash on yamaha warrior
,
yamaha warrior 350 valve clearance closing when hot
,
2001 yamaha warrior valve specs
,
how to adjust the valves on a 2001 yamaha warrior
,
how to to remove valves from yamaha warrior 350
,
what will cause a spark plug to be carbon fouled on a yamaha 350 warrior
,
gauge valve adjusting yamaha wolverine 350
Click on a term to search our sites for related topics.

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Parting a complete 2001 Yamaha Warrior crnkyatv Parts for Sale 16 04-10-2011 10:28 AM
2001 Yamaha Warrior kickassrider48 ATVs for Sale 2 12-19-2010 11:17 PM
knocking from 2001 Yamaha 350 Warrior profarmall Yamaha YFM350 Raptor/Warrior ('87-Present) 5 09-29-2008 03:56 PM
FS: 2001 Yamaha Warrior w/ extras RichyB101 ATVs for Sale 7 06-13-2007 10:10 AM
2001 Yamaha warrior valve specs latin68 Yamaha YFM350 Raptor/Warrior ('87-Present) 2 02-10-2007 11:14 AM

» Discount Tire
Motosport.com

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 03:26 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.