How to: Check valve clearance - Yamaha Raptor Forum
 

» Recent Threads
clutch inner serrated...
08-09-2014 11:49 AM
Last post by Strokin82
Today 12:01 PM
18 Replies, 279 Views
where to get chain and...
Today 04:38 AM
by blue660
Last post by morphrider
Today 12:00 PM
3 Replies, 24 Views
Direct Drive clutches?
Today 05:01 AM
by SS4Luck
Last post by White13
Today 11:26 AM
2 Replies, 42 Views
clutch change
Yesterday 10:49 AM
Last post by jsanders347
Today 11:22 AM
5 Replies, 38 Views
What to when bored at...
Yesterday 03:31 AM
by Gmm213
Last post by ridgerunnerseoinc
Today 10:28 AM
7 Replies, 102 Views
Raptor of the Month...
11-23-2014 12:37 AM
Last post by stadn67
Today 09:39 AM
3 Replies, 118 Views
Custom Seat covers
Yesterday 06:57 PM
by Gmm213
Last post by dog86
Today 09:24 AM
10 Replies, 73 Views
Central Texas riders????
01-17-2007 10:42 AM
by Rap660
Last post by johnnyB
Today 08:43 AM
15 Replies, 700 Views
wanting inputs on 660...
11-23-2014 02:47 PM
Last post by badlukrappy
Today 06:38 AM
13 Replies, 152 Views
660 won't start
11-23-2014 01:17 AM
Last post by willykiller
Today 05:28 AM
10 Replies, 110 Views
» Sponsors
Go Back   Yamaha Raptor Forum > Raptor 660 Categories > Raptor 660 Maintenance

Reply
 
LinkBack LinkBack Thread Tools Display Modes
Old 02-22-2010, 11:23 AM   #1 (permalink)
Senior Member
 
Join Date: Jan 2008
Posts: 259
Thumbs up How to: Check valve clearance

Hi all the other link in the stickied thread didn't work so here is a link on very detailed instructions on checking your valve clearance: http://raptor.popolz.com/adjust.html
If your raptor is sort of hard to start I would defiantly check into this. I should have done a before and after video on the way mine started and starts now. Its night and day difference. Good luck!
__________________
2001 660 Yoshi RS-3 full, K&N Pro Flow, jetted,Dr.D Reverse, maxis rears, nerfs,shock covers,YFZ 450 Fronts,G-force extended hubs,GYTR Bumper
2003 CBR 600rr, scorpion pipe, flush mounts, etc..= FUN
Gman_raptor is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-22-2010, 11:59 AM   #2 (permalink)
Moderator
 
Mad Dog's Avatar
 
Join Date: May 2005
Posts: 16,754
Default

I don't recall seeing a valve clearance sticky but it is outlined in the factory service manual. I may have seen that link posted here before but not recently, thanks for the link.
__________________
Mike


Last edited by Mad Dog; 02-22-2010 at 12:11 PM.
Mad Dog is offline   Reply With Quote
Old 02-22-2010, 03:21 PM   #3 (permalink)
Senior Member
 
Join Date: Jan 2008
Posts: 259
Default

ya I tried to open the one in the service manual sticky and it didn't work, it may have just been my computer though.
__________________
2001 660 Yoshi RS-3 full, K&N Pro Flow, jetted,Dr.D Reverse, maxis rears, nerfs,shock covers,YFZ 450 Fronts,G-force extended hubs,GYTR Bumper
2003 CBR 600rr, scorpion pipe, flush mounts, etc..= FUN
Gman_raptor is offline   Reply With Quote
Old 02-22-2010, 03:32 PM   #4 (permalink)
Master of the Electron

 
QuadManiac's Avatar
 
Join Date: Apr 2007
Location: San Diego, CA
Posts: 12,766
Default

One thing overlooked in this link (and in the manual):

They both state that if a feeler gauge won't fit in the intake valves, you are on the wrong stroke and should turn the crankshaft one more turn. This is correct, as long as the valves have not worn tight, which is common with the Raptor. In some cases the intake valves have worn so tight that there is NO clearance, and the bike has begun to lose compression when cold - making it hard to start when cold.

Instead of using this method to determine TDC compression, I watch the exhaust valves until they are nearly closed and at the same time the intake valves until they JUST start to open - you should see (or just have seen) the I in the inspection window. I then turn a full turn until the I comes up again, and there's been no valve motion for the last half turn (Willy likes to rock the crankshaft back and forth at this point to verify there's no valve motion).

This guarantees that you are at TDC compression stroke - the proper place to adjust valves.
__________________
'01 660 Raptor, Burgard +2+1 arms, YFZ Shocks, LSR anti-vibe, CTR pipe, jetted, K&N
'01 Polaris Scrambler 400, K&N
'02 Honda 400ex, Big Gun pipe, jetted, K&N, Lonestar +2 A-arms, Lonestar anti-vibe
'02 Honda 400ex, DiamondJ +3 A-arm widener, Lonestar anti-vibe

Last edited by QuadManiac; 02-25-2010 at 12:48 AM.
QuadManiac is offline   Reply With Quote
Old 02-24-2010, 09:32 AM   #5 (permalink)
Moderator
 
Mad Dog's Avatar
 
Join Date: May 2005
Posts: 16,754
Default

Well since we don't have a sticky for it, and since QM went through the trouble of posting that I'll go ahead and sticky this one.
__________________
Mike

Mad Dog is offline   Reply With Quote
Old 02-28-2010, 07:14 PM   #6 (permalink)
Junior Member
 
Join Date: Feb 2010
Location: Kalispell, MT
Posts: 3
Default

Great site for valve adjustment...really informative step by step....thanks
Proudpapa is offline   Reply With Quote
Old 03-26-2010, 11:57 PM   #7 (permalink)
Junior Member
 
Join Date: Mar 2010
Posts: 10
Default

Thanks for the post great information very, very helpful!
Seun is offline   Reply With Quote
Old 03-27-2010, 12:24 AM   #8 (permalink)
I am unique

 
willykiller's Avatar
 
Join Date: Jun 2007
Location: Ottawa, Ontario
Posts: 22,128
Default

Quote:
Originally Posted by QuadManiac View Post
One thing overlooked in this link (and in the manual):

They both state that if a feeler gauge won't fit in the intake valves, you are on the wrong stroke and should turn the crankshaft one more turn. This is correct, as long as the valves have not worn tight, which is common with the Raptor. In some cases the intake valves have worn so tight that there is NO clearance, and the bike has begun to lose compression when cold - making it hard to start when cold.

Instead of using this method to determine TDC compression, I watch the exhaust valves until they are nearly closed and at the same time the intake valves until they JUST start to open - you should see (or just have seen) the I in the inspection window. I then turn a full turn until the I comes up again, and there's been no valve motion for the last half turn (Willy likes to rock the crankshaft back and forth at this point to verify there's no valve motion).

This guarantees that you are at TDC compression stroke - the proper place to adjust valves.
I just love setting up valves, years ago when I did a fair amount of ATV pulling, we had to have a stock engine, which of course I didn't, one thing they checked for was aftermarket cams, and as most people know, they have a rather loud ticking noise, I set my valves at about .002'' intake and the exhaust at about .0035'', this kept the valve trains noise to none existant levels, I got to have my big cam and noone knew..........
__________________

686 three plugger with HV porting, 39 FCRS, Curtis Sparks exhaust, Dyna FS CDI
willykiller is offline   Reply With Quote
Old 06-16-2010, 03:19 PM   #9 (permalink)
Senior Member
 
raptorryan's Avatar
 
Join Date: Aug 2007
Location: Ashland, MO
Posts: 494
Default

Sneaky, Sneaky, there is always that guy. And you were him, lol. Thats pretty funny. I bet people thought wow, those Raptors sure can pull!
__________________
02' 660, Renthals, Armidillo skids, K&N, Chopped Front Fenders, AC front bumper, DG rear,
raptorryan is offline   Reply With Quote
Old 10-25-2010, 09:28 PM   #10 (permalink)
Senior Member
 
Brainless's Avatar
 
Join Date: Oct 2010
Location: Quebec, Canada
Posts: 190
Default

Nice tread, thx ! I know what ill be doing this weekend
Brainless is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 12:15 PM.




Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.1
Content Relevant URLs by vBSEO 3.6.1
RaptorForum.com is an independent Yamaha enthusiast website. Content on RaptorForum.com is generated by its users and RaptorForum.com is not in any way affiliated with Yamaha Motor Corporation, U.S.A.
Inactive Reminders By Mished.co.uk and FTP-Anime.com