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Post by geh3333 on Jun 29, 2015 19:25:07 GMT -5
It was above where the belt is (the airbox) I think that's where the hose was running honestly i don't remember at this point, where would the hose from the cover (sorry don't know the name, the thing that covers where the valves are) go The one hose from the manifold goes to a splitter and goes to the petcock and the other split goes to the carb The second hose goes to those canister emissions things Ill take a better picture when I get off work you need to hang the valve cover vent hose up high and put some kind of filter on it, so nothing can get into the valve cover. I would also eliminate all the emissions crap and close off the extra vaccum lines. |
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Post by geh3333 on Jun 29, 2015 19:15:10 GMT -5
I'm going to do the CDI vid tomorrow. But, wouldn't 2 flashes actually be 1 RPM? How do I count it? Every flash is one rpm, the plug fires on each rotation. Even though there is only one ignition every two rotations. The first down stroke pulls in the air and fuel. Then on the upstroke the piston compresses the air and fuel and the plug ignites the mixture at TDC and pushes the piston on the second downstroke. On the next upstroke the exhaust valve opens and releases the gasses . the plug fires again as the piston reaches TDC on the exhaust stroke , but with no ignition. So everytime the light flashes , Is one rotation. Every two rotations is one full cycle. And every cycle has 4 strokes , 2 down and 2 up. |
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Post by geh3333 on Jun 29, 2015 19:09:12 GMT -5
Hmm ok so could this be from me removing the stock airbox and just having the hose that went back to the airbox just hanging? Honestly i can't figure out how to completely eliminate this problem I feel like I have to be missing something obvious My header has turned a dark bluish from the original stainless and I'm worried about this happening to the muffler as well Was your air box under the front of the seat ? The only hose I had running to mine was the valve cover vent hose. I left the old airbox in place and kept the vent hose connected to it. Where are the two vacuum lines running to from the manifold ? |
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Post by geh3333 on Jun 29, 2015 19:07:32 GMT -5
Hmm ok so could this be from me removing the stock airbox and just having the hose that went back to the airbox just hanging? Honestly i can't figure out how to completely eliminate this problem I feel like I have to be missing something obvious My header has turned a dark bluish from the original stainless and I'm worried about this happening to the muffler as well Was you air box under the front of the seat ? The only hose I had running to mine was the valve cover vent hose. I left the only airbox in place and kept the vent hose connected to it. Where are the two vacuum lines running to from the manifold ? |
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Post by geh3333 on Jun 29, 2015 19:01:48 GMT -5
Hey pistonguy , don't miss your favorite show 2night ! , lol
I'm jkiddin buddy.
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Post by geh3333 on Jun 29, 2015 18:57:18 GMT -5
I did the test again and it seemed like it was closer to five exhaust strokes every second at 1300 rpms. So that would be 10 rotations every second . 10 x 60 is 600 rpms every minute. Now that is at lower then normal idle rpms. If anyone can duplicate this test , I'd be very grateful. What you do is first try to get the rpms down to 1300 . put your hand over the exhaust . you can feel and hear every exhaust stroke. I then began to tap the exhaust with my hand " to the exhaust stroke" I counted " 12345 ,22345 ,32345 , 42345 ". I was getting about 5 exhaust strokes in each second .
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Post by geh3333 on Jun 29, 2015 18:10:30 GMT -5
My bushings are shot. I just put washers against the outer side of the bushings so the engine doesn't shift. Lol
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Chinese tachs
by: geh3333 - Jun 29, 2015 18:00:22 GMT -5
via mobile
Post by geh3333 on Jun 29, 2015 18:00:22 GMT -5
At this point I cannot say I'm correct , but I think I'm on to something. Think about it. At 1200 rpms there is no way you would be able to keep count of the exhaust strokes. That would be 10 exhaust strokes every second and 20 rotations every second. At 1200 rpms you can clearly hear and feel every exhaust stroke. I know most motos idle between 900-1500 rpms . maybe I'm just flat out wrong.
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Chinese tachs
by: geh3333 - Jun 29, 2015 17:45:20 GMT -5
via mobile
Post by geh3333 on Jun 29, 2015 17:45:20 GMT -5
There is zero chance a GY6 engine would idle and not quit at 750 RPM. Sorry - that is the real world. That is my whole point, we've been going by these TACHS for years. Its hard to get an accurate reading at 1700 rpms , but at 1200 or so rpms its pretty easy. |
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Chinese tachs
by: geh3333 - Jun 29, 2015 17:43:11 GMT -5
via mobile
Post by geh3333 on Jun 29, 2015 17:43:11 GMT -5
Hey dmartin , is there a way you can test this with a timing light and get an accurate reading ?
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Chinese tachs
by: geh3333 - Jun 29, 2015 17:32:52 GMT -5
via mobile
Post by geh3333 on Jun 29, 2015 17:32:52 GMT -5
At 1200-1300 rpms , you can clearly feel and hear the exhaust strokes.
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Chinese tachs
by: geh3333 - Jun 29, 2015 17:30:13 GMT -5
via mobile
Post by geh3333 on Jun 29, 2015 17:30:13 GMT -5
There is zero chance a GY6 engine would idle and not quit at 750 RPM. Sorry - that is the real world. Here are my results . at 1200-1300 rpms , the exhaust is opening 4 times a second. So that would be 8 rotations a second. 8x60 is 480 rotations a minute . 1200-1300 rpms is well below recommended idle. So at 1700 rpms it should be pretty close to 700 - 750 rpms. Can someone do the same test and verify this. We can see his scoot is reading 500 rpms at times . this is pretty interesting. |
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Chinese tachs
by: geh3333 - Jun 29, 2015 16:19:36 GMT -5
via mobile
Post by geh3333 on Jun 29, 2015 16:19:36 GMT -5
That would be great.
My main problem is that both engines are a gy6 150. Why would one call for 750 idle rpms and one call for 1700 idle rpms. That's a big difference. The only thing that can be different is that they are using different TACHS. When one is idling at 700 rpms and it sounds the same as the other scoot idleing at 1700 rpms , we have an issue. I would not be surprised if most of these TACHS are not correct.
I have an idea. You can feel every exhaust stroke by putting your hand over the exhaust. You can do a ten second timer and count the amount of exhaust strokes. You would then have to multiply that by two if I'm not mistaken.
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Post by geh3333 on Jun 29, 2015 16:00:53 GMT -5
How much room do you have between your rear tire and the back of the engine block?
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Post by geh3333 on Jun 29, 2015 15:59:46 GMT -5
what do these number mean? would 120/70-10 fit? is 120 the width in MM and 70 the %? found a nice white wall one in that combo.. thanks 120 is the width and the sidewall height is 70% of 120mm . so 130's would be wider. And a 130/70 would even be taller . 70% of 130mm A taller tire will give you a faster top speed. |
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