Valve Maintenance HELP Needed!
Posted 12 November 2011 - 02:14 PM
Posted 12 November 2011 - 03:51 PM
The tappet has a nut on the top to adjust the gap, and there is a special tool made to tighten the nut and hold the bolt in place. But you don't really need it to do the adjustment. Just recheck after adjustment, and then change as necessary. Good luck with it.
go to about 4:20 or so.
Edited by ronbuell, 12 November 2011 - 04:31 PM.
Posted 12 November 2011 - 08:21 PM
It addresses your question with this:
"Starting with either valve, insert a 0.002" feeler gauge between the bottom of the adjusting screw and the valve stem. The easiest way to do this is to "walk" the feeler down the adjusting screw until you feel the gap, then insert the feeler. Starting with a thin feeler will help you get the hang of this."
Make sure you're at TDC on the compression stroke too.
Posted 13 November 2011 - 07:51 PM
Posted 14 November 2011 - 11:05 AM
Both the 0.002" and 0.003" feeler guage should slip into the gap very easily. If they don't, the valves are too tight and need adjusted.
Its important to make sure that the "T" you are seeing in the sight glass is for TDC on the compression stroke and not TDC on the exhaust stroke. It can make a difference in the gap. I always watch the intake valve open and close to know for sure that the next "T" in the sight glass is on the compression stroke.
Posted 14 November 2011 - 05:46 PM
Also, just as a test, I always put my finger on the tappet and move it up and down. If I feel movement, then I know its not totally closed up. When in spec, you should feel a slight movement and maybe even here a click, but if it clicks too much, it can be too wide and will be noisy if run. Good luck, you're on the way!
Posted 14 November 2011 - 06:05 PM
Posted 14 November 2011 - 07:24 PM
Posted 14 November 2011 - 07:35 PM
Yep, like ron said you can absolutely do it without the tool. The tool just makes it easier. I've done it both ways and much prefer using the tool.
Search "Motion Pro Tappet Adjustment Wrench Set 08-0073" on Amazon.com.
They currently have 16 "new" listings for this priced from $27.91 and up.
Posted 14 November 2011 - 08:25 PM
I made my own tool back in the 80s when I was racing 200s.
I just took a small piece of steel (perhaps 16 awg x 0.250 x 1.5") and used a hack saw and die file to make a very tiny open end wrench to hold the adjuster while I tighten the nut with 10 mm box end wrench.
Posted 14 November 2011 - 08:47 PM
Posted 15 November 2011 - 04:16 AM
Yes, .10mm is the correct metric clearance. Here's the metric conversion for the other guages mentioned in the link.
.002" = .05mm
.003" = .075mm
.004" = .10mm
.005" = .125mm
Have you tried a .05mm in the gaps just to see if it will fit? If my valves are off, I am alway interested in how tight or loose they are. When I checked my current '04 right after I got it, the .002" wouldn't fit on the intake side and there was no resistance with the .005" on the exhaust side. The bike was easy to start and ran like a top too.
Yes, loosen the nut and turn the adjusting screw counter-clockwise to increase the gap. The adjustment is very "delicate". 1/8th of a turn will make a big difference in the guaged gap so make the adjustments in very small increments. When you're done the .10mm guage should fit snuggly into the gap and a .12mm should not fit at all.
Posted 15 November 2011 - 01:32 PM
Very true which is why you need a little tool to hold the adjuster while you tighten the nut.
You never want valves too close expecially with such a small gap but an extra .001-.002 doesn't hurt a thing. Beyond that it is a little hard on parts as there is usually a little ramp to take up clearance easy before the steep part starts and you would eliminate that.
Posted 15 November 2011 - 06:19 PM
Try this as a learning exercise. Take an old sparkplug and close the gap down to what looks like the .004" gap you need. Then run the feeler thru it. You have it right when the gauge has a slight drag, but you can still insert it between the center electrode and the ground tang. Try it, it works. Good luck.
Posted 15 November 2011 - 06:44 PM
Posted 15 November 2011 - 07:27 PM
Posted 15 November 2011 - 08:08 PM
I think i know were i went wrong tho, im tighting it clockwise trying to increase the gap when i should be tighting it counter-clockwise to increase.
Edited by Sookerider, 15 November 2011 - 08:26 PM.