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Post by Deleted on Apr 12, 2013 17:07:44 GMT -5
The only sets I find dont have a speciffic ".05 mm"
The only ones I find says ".002, and under that it says .051 mm"
Is this close enough for .05 MM valve adjustment?
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Post by gatekeeper on Apr 12, 2013 17:27:44 GMT -5
Yes that is fine. I know the manuals usually call for .05mm but I think the is a bit tight. I set mine at .1mm. (around .004 inchees)
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Post by prodigit on Apr 12, 2013 17:59:31 GMT -5
The ultimate setting would be 0.00; however, because some parts heat up, and tolerances change, you could end up messing up your engine.
Set as low as possible, without strange noises, vibrations, or lockups.
The larger the gap, the more tolerance it has, but the lower the performance (the more exhaust gasses escape the valves at detonation).
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Post by millsc on Apr 12, 2013 21:48:04 GMT -5
The ultimate setting would be 0.00; however, because some parts heat up, and tolerances change, you could end up messing up your engine. Set as low as possible, without strange noises, vibrations, or lockups. The larger the gap, the more tolerance it has, but the lower the performance (the more exhaust gasses escape the valves at detonation). the scoot wont start at 0 |
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Post by skuttadawg on Apr 12, 2013 22:00:37 GMT -5
Go to any autoparts store and get valve feeler gauges which are bent in order to fit in there . Cost 3 dollars at Oreillys
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Post by alleyoop on Apr 12, 2013 22:31:17 GMT -5
The bigger the gap the LESS FUEL AND AIR IT GETS TO SUCK IN because the valves are not opening enough and long enough and therefore less of an explosion less power. To tight on the exhaust which takes a lot of heat it will not close and seal completely after it expands and you loose compression. That results in hard starting and not able to hold LOW rpms and IDLE after it gets hot. In this case coming top stops it may die unless you keep on the throttle a little.
A good setting for 50ccs is .003 inchs on both valves on 150+ccs .004 inchs on both valves. You could go .004 on the exhaust valve on the 50cc and .005 on the 150+cc to perlong the next valve adjustment needed. But if the Valves make a racket, CLATTER, CLATTER, CLATTER go down one on the MM adjustment. A TICKY, TICKY, TICKY sound is good you know they are not tight and not to loose.
Alleyoop
Alleyoop
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Post by h3nry on Apr 13, 2013 0:59:24 GMT -5
I just adjusted mine and had the feelers but it was impossible to get them into the tight space, what I did was adjust it a few times with a guesstimate and they are a little loose but its not too loose.
Some how after adjusting them loose like that I now have issues kick starting it, seems to be a bit advanced on the spark some how just from adjusting the valves... . Its actually better tho, I get over 60mph now..
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Post by prodigit on Apr 13, 2013 1:31:07 GMT -5
The bigger the gap the LESS FUEL AND AIR IT GETS TO SUCK IN because the valves are not opening enough and long enough and therefore less of an explosion less power. To tight on the exhaust which takes a lot of heat it will not close and seal completely after it expands and you loose compression. That results in hard starting and not able to hold LOW rpms and IDLE after it gets hot. In this case coming top stops it may die unless you keep on the throttle a little. A good setting for 50ccs is .003 inchs on both valves on 150+ccs .004 inchs on both valves. You could go .004 on the exhaust valve on the 50cc and .005 on the 150+cc to perlong the next valve adjustment needed. But if the Valves make a racket, CLATTER, CLATTER, CLATTER go down one on the MM adjustment. A TICKY, TICKY, TICKY sound is good you know they are not tight and not to loose. Alleyoop Alleyoop Thanks for the explanation! I always was under the impression, that a 0,00" setting for exhaust valves offered 'perfect' sealing, thus best compression. However, it could cause problems with overtightening as parts heat up and tolerances change on a hot engine vs a cold engine. So my impression was that for that reason (at least for the exhaust valves), that one had to increase the value by a fraction of an inch (eg: 0.01" or 0.02"). The higher the setting (eg:005") the safer, the less things will break down, but also the less compression you'll have, the smoother the exhaust will sound. For intake, I don't really know what happens, I presume that valve clearance of 0.02" vs 0.05" makes very little difference, save for losing compression, and have exhaust gasses enter the air intake? |
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Post by prodigit on Apr 13, 2013 1:32:08 GMT -5
I just adjusted mine and had the feelers but it was impossible to get them into the tight space, what I did was adjust it a few times with a guesstimate and they are a little loose but its not too loose. Some how after adjusting them loose like that I now have issues kick starting it, seems to be a bit advanced on the spark some how just from adjusting the valves... . Its actually better tho, I get over 60mph now.. If you don't have feeler gauges that fit in there, just use aluminum foil. One or two layers, and tighten the adjustment screw. |
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..BAD TO THE BONE..
