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Post by jimslaton on Jan 3, 2009 5:50:00 GMT -5
I spent 6 hours last night adjusting my valves on my MC 250B. I purchased a set of Feeler Gauges and need help on how to read them. I understand that the intake valve (on top) should be .004 and the exhaust valve (bottom) should be .006. Each feeler gauge blade has two sets of numbers with the bottom number having MM added to it. Which set of numbers should I be using on the feeler gauge? Below is a link to a photo of my gauges with numbers... farm4.static.flickr.com/3259/3162147217_cfb2da3336.jpg?v=0 |
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Post by leo on Jan 3, 2009 6:18:22 GMT -5
the number with mm next to it is the top number in millimeters.
your intake calls for .004, so use the feeler with .004
the number below .004 is .004 in millimeters.
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Post by donkinney on Jan 3, 2009 7:02:10 GMT -5
The .004" is in inches, not mm as that is shown as .102MM. I set my valves in inches, .004 for intake and .006 for exhaust. Don
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Post by scoot-away on Jan 3, 2009 11:00:10 GMT -5
Jim reading a feeler gauge is one thing but using it correctly is another thing. When you slide the feeler through the gap there should be a little resistence, it must not slide through very freely if you get what I'm saying. Likewise it should not be very tight either.
Sometimes I cannot understand why you guys in the USA still uses an outdated form of measurement. Metrics are so much better and easier.
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Post by ScootGuy on Jan 3, 2009 14:22:53 GMT -5
Sometimes I cannot understand why you guys in the USA still uses an outdated form of measurement. Metrics are so much better and easier. Sure, if all your tools are metric and all your cars and equipment is metric and you were born and raised using metric it it is easier. Now, if you have 10s of thousands of $ invested in standard tools and have been using the standard measurement scale for over 50 years, and most older equipment and a lot of the new equipment still used standard bolts and nuts, you would consider it the other way. They have been teaching metric for many years in the US now, one day, a switch-over will hopefully happen. As it so happens, I have been a computer tech for a long time and know metric as well and standard, but, I still have more tools in standard, but that is changing as I add more tools to my collection for my MCs and Scooters.  one day....... |
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Post by donkinney on Jan 3, 2009 14:38:30 GMT -5
I agree with scootguy and scoot-away. I have about half my tools in american and the other in metric. I like metric but we still use american here. Until we do a complete switch, have both and need to. Don
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Post by jimslaton on Jan 4, 2009 1:31:54 GMT -5
So I should be using the top numbers for adjusting my valves NOT the bottom numbers that have "mm" next to it.....right?
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Post by jimslaton on Jan 4, 2009 1:34:08 GMT -5
One more thing, how long before I will need to adjust my valves again? I mean how much longer should I expect between adjusting? Also, my scooter is running much better now but how do I know I used the feeler gauge correctly and not just close? How can I tweak them to maximum clearance?
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Post by leo on Jan 4, 2009 3:09:25 GMT -5
So I should be using the top numbers for adjusting my valves NOT the bottom numbers that have "mm" next to it.....right? yes. |
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Post by ScootGuy on Jan 4, 2009 4:50:53 GMT -5
One more thing, how long before I will need to adjust my valves again? I mean how much longer should I expect between adjusting? I believe it is every 2000 miles (after the first 300 or 500 mile adjustment) on that engine, but, you should check your owners manual to make sure. You can't check it to much, can't hurt anything. As the engine breaks in, if broken in correctly, you should notice the valve adjustment intervals will start getting longer between needing adjustments. YMMV |
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Post by scoot-away on Jan 4, 2009 6:12:01 GMT -5
Sorry Jim you were asking about the feeler gauge and here I go off on metrics v standard.
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Post by donkinney on Jan 4, 2009 6:35:45 GMT -5
yes, shame on you scoot-away. lol I have the "plastic " on bottom and underseat off and can check mine often. I checked at 1500 miles and after my adjustment at 500 miles, they had not changed. I will check each about 1000 miles or so but can after taking of engine caps, with the plastic already off. Yes, the top numbers on left are in inches on your gages. Use the .004" for the intake and the .005-007" for the exhaust. If you have adjusted and it is running, ok then I would just check every 500-1000 miles, adjust if necessary. Don
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Post by mainscoot on Jan 4, 2009 9:30:48 GMT -5
I'd just like to ask one question and why is the metric system supposed to be easier, myself I find it a lot more complicated especially when dealing with decimels. I think a lot of countries who have metric just want to be different than the good old USA after all we are number one as in the THE BIG DAWG and proud of it!!!!
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Post by leo on Jan 4, 2009 17:19:15 GMT -5
I'd just like to ask one question and why is the metric system supposed to be easier, myself I find it a lot more complicated especially when dealing with decimels. the metric system is much simpler than the american system because its based on 10 we can go from milimeters to centimeters just by multiplying by 10 we can go from meters to kilometers by multiplying by 1000 we gan go from grams to kilograms by multiplying by 1000 in american sytem we go from inches to feet by multiplying 12 yards to miles by 1760 ounces to pounds by 16. |
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Post by ScootGuy on Jan 4, 2009 17:21:21 GMT -5
I'd just like to ask one question and why is the metric system supposed to be easier, myself I find it a lot more complicated especially when dealing with decimels. the metric system is much simpler than the american system because its based on 10 we can go from milimeters to centimeters just by multiplying by 10 we can go from meters to kilometers by multiplying by 1000 we gan go from grams to kilograms by multiplying by 1000 in american sytem we go from inches to feet by multiplying 12 yards to miles by 1760 ounces to pounds by 16. I'd have to agree, the metric system is easier once known. |
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Post by motomech on Jan 4, 2009 19:02:27 GMT -5
All the pros I know think in thousands of an inch for things like engine clearances, even for Asian products.
I've been a mechanic all my adult life and that is the way I think(down to 1 m/m in metric, then inches when going smaller).
The resistance on the feeler gauge with sm. engines should require a firm pull with the thumb and forefinger. Then the gauge should be able to go back in with little trouble.
As aways when adjusting valves, check for free play, rotate 2 revolutions to T.D.C. compression and ck. for free play again.
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Post by WarrenS on Jan 4, 2009 19:50:13 GMT -5
I have a complete set of metric sockets in 1/4, 3/8, and 1/2 inch drive. ;D
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Post by scoot-away on Jan 7, 2009 9:27:30 GMT -5
Well I guess its one of those "i was raised like that" scenarios. If you were raised a christen then islam seems weird, or budhism etc. I was raised with metrics so to call for a 13 ring seems easier than saying pass me the half inch ot get me a 10 socket instead of a 3/8. hell I don't even know what 3/8 means but my minds eye can see a 10 mm.
Also do you call it a star or a philips screwdriver. Why is it called a philips in the first place.
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Post by unclejay on Jan 7, 2009 9:48:09 GMT -5
Me, I measure in Furlongs per Fortnight.
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Post by ScootGuy on Jan 7, 2009 11:32:04 GMT -5
Also do you call it a star or a philips screwdriver. Why is it called a philips in the first place. Because Henry F. Phillips was one of the inventors of it and held the patents for it. Most people call the Pozidriv a phillips also, but, there is a difference.... en.wikipedia.org/wiki/Henry_F._Phillips |
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Post by scoot-away on Jan 9, 2009 8:37:11 GMT -5
Thanks for that Scootguy this is what I like about this site, we teach each other things and we getting clever.
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