99 400 IN NEED OF VALVE ADJUSTMENT!!!
Posted November 05, 2000 - 09:52 AM
Posted November 05, 2000 - 10:17 PM
ps It an't the bike loesing power it's you riding faster [I.E. need more power]
Posted November 05, 2000 - 11:43 AM
I can clearly see you have been blowing off your maintenance. Shame on you, silly boy!
First off, follow your manual. You have already measured your clearance. Your next step is to accurately record the valve clearances. Next, you will have to remove each shim. On the shim is a number. Write this number down immediately w/ the clearance you have already measured. Using the chart in your book, you now locate your required shim. Write this down as well. Then you go to your Yamaha dealer or mail order, and order them. Then you wait 3 weeks before they show up. Install the new shims and "Voila", YOU ARE DONE.
Posted November 05, 2000 - 02:21 PM
[This message has been edited by Boit (edited 11-05-2000).]
Posted November 06, 2000 - 11:49 AM
Posted November 06, 2000 - 12:14 PM
99WR,WR timing,throttle stop removed,Uni filter,E-Series pipe,carbon air box,Pro Tapers,lights removed,YZ tank,13 tooth sprocket
Posted November 06, 2000 - 01:10 PM
Sorry. I don't really know what that means.
Your dealership definately should have shims for your bike Howard.
The owners manual is excellent for giving you the adustment steps.
[This message has been edited by Bryan (edited 11-06-2000).]
Posted November 06, 2000 - 02:56 PM
Posted November 07, 2000 - 03:08 PM
I just replaced my valve shims on the weekend. It is relatively straight forward job and is something that is not that technical (even for someone as mechanically inept as me). I recommend covering your frame above the motor in plastic to avoid dirt falling into the motor. When you measure the valve clearance be sure that the feeler gauge is "square" when you insert it under the lobe or you will get an inaccurate measurement. Use a magnet rod to lift the valve buckets. I just bought one specifically for the job - bloody sensational tool. Beware of the 12mm bolt hole central to the chain tensioner. I stripped mine out very, very easily. The chart is very easy to use. Just cross reference your paticular valve clearance with the particular shim number and that is the shim needed to be ordered for that particular valve. Thanks to Boit who gave me some helpful hints. Good luck to both yourself and Scott.