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Post by cypher1982 on Jul 31, 2020 9:59:57 GMT -5
I'm feeling pretty positive I'm still way to lean here. Had the scoot good and warmed up, swapped to a new plug and ran it WOT for a mile or so then shut down like supposed to. Pics to come....when I figure out how lol
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Post by cypher1982 on Jul 31, 2020 10:01:38 GMT -5
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Post by cypher1982 on Jul 31, 2020 10:03:17 GMT -5
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Post by Zino on Jul 31, 2020 16:14:18 GMT -5
way lean Danger Will Robinson
Go up 15 % in size and see if it gurgles and then work down . Work down slowly Track top speed which each jet and feel Take the richest one that gives you best Top speed and feel .
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Post by cypher1982 on Jul 31, 2020 18:19:00 GMT -5
way lean Danger Will Robinson Go up 15 % in size and see if it gurgles and then work down . Work down slowly Track top speed which each jet and feel Take the richest one that gives you best Top speed and feel . That's what I was thinking. I've got a 90 in it currently, I have a multi jet kit coming next week, so 15%... so start with like a 105, 108, or 110? I guess it's just gonna depend if I keep the intake setup like this, or use my air scoop I 3d printed lol.
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Post by mikehailwood on Jul 31, 2020 18:34:01 GMT -5
way lean Danger Will Robinson Go up 15 % in size and see if it gurgles and then work down . Work down slowly Track top speed which each jet and feel Take the richest one that gives you best Top speed and feel . That's what I was thinking. I've got a 90 in it currently, I have a multi jet kit coming next week, so 15%... so start with like a 105, 108, or 110? I guess it's just gonna depend if I keep the intake setup like this, or use my air scoop I 3d printed lol. Seems very unwise to introduce another variable (that air scoop thing) before getting the jetting correct with the current setup.
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Post by Zino on Jul 31, 2020 20:13:20 GMT -5
Mike is right hold off on the air scoop until we get it jetted for your current set up try the 105 see how it feels if it is gurgly and runs rough at wide open and better at 7/8 throttle you are only a few jets off. Say 5% or less If it is just spitting and stammering at 7/8 3/4 wide open you have a lot of room before you get in range of your jets . More than 5%. When it stops gurgling then you start taking notes on top speed and how it feels at wide open for power . As you go down you will find a couple jets with same top speed . Take the richer one .
Then dial in the needle work your way down just go with the one that feels best for throttle response if 2 feel similar go with the richer one .
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Post by Steve B on Jul 31, 2020 20:59:32 GMT -5
You would be much better off with the stock air box modified. You can make exceptional power. It will be much safer too.
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Post by cypher1982 on Jul 31, 2020 21:01:10 GMT -5
Mike is right hold off on the air scoop until we get it jetted for your current set up try the 105 see how it feels if it is gurgly and runs rough at wide open and better at 7/8 throttle you are only a few jets off. Say 5% or less If it is just spitting and stammering at 7/8 3/4 wide open you have a lot of room before you get in range of your jets . More than 5%. When it stops gurgling then you start taking notes on top speed and how it feels at wide open for power . As you go down you will find a couple jets with same top speed . Take the richer one . Then dial in the needle work your way down just go with the one that feels best for throttle response if 2 feel similar go with the richer one . Will do zino. The stock kym needle isnt adjustable, and I do have it shimmed. That being said for some reason the needle doesnt run straight, its angled like the machine boss for it isnt perfect. So I bought a cheap gy6 18mm replacement diaphragm with adjustable needle. It comes through perfectly straight. I do want to compare needle diameters to how it's currently set shimmed. But I guess that doesnt matter once the main is set. Then we can see about the air scoop mod.
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Post by cypher1982 on Jul 31, 2020 21:05:25 GMT -5
You would be much better off with the stock air box modified. You can make exceptional power. It will be much safer too. I actually have the stock box modified...in a sense. I opened up the snorkel inlet and removed a molded rubber ridge in the carb I let line... however that being said... I upjetted to an 85 and it ran, the stock 80 wouldn't go above 15. So I went to a 90, which is where I am at now. I found 2 shims let it semi reasonably accelerate. But even then it felt off and bogging...I couldnt tell if it was rich or lean because I hadn't pulled the plug. I put a small piece of cloth over the snorkel inlet and it flat died. Like wouldnt get out of driveway. I removed the air filter and box lid and it moved ok, but worse than now. So I knew I needed air. So I settled with running the stock filter, with the back half the box, and basically opened up the front to being nonrestricted, and its definitely got the best up and go now. So I know it wants to breath, but I need to get that jetting right.
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Post by Steve B on Jul 31, 2020 23:46:50 GMT -5
What are all the modifications you done to you're scooter?
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Post by cypher1982 on Aug 1, 2020 7:37:13 GMT -5
What are all the modifications you done to you're scooter? Variator boss, removed air tube ridge, and upjetted and shimmed. I've tried many different combos of air and fueling by way of shims and the 85 and 90 jet, as well as air box changes and settled with the 90 jet, 2 shims, and running open air box (with filter). It runs the best this way, best acceleration, and top end. I've done a little.bit of carb work also, but its very minor. I made sure the air port on the diaphragm wasn't blocked (was 50% covered from the factory). And smoothed the leading face of the piston.
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Post by jackrides on Aug 1, 2020 12:54:14 GMT -5
Is the open velocity stack for the carb? With a smooth hose to the air box? Great looking 3D printing!
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Post by cypher1982 on Aug 1, 2020 13:05:09 GMT -5
Is the open velocity stack for the carb? With a smooth hose to the air box? Great looking 3D printing! Actually the carb hose is smooth inside and made pretty good, however the way the air gets into that tube from after the filter is not really the best. So the cone is to help it draw air post filter. The other velocity stack is to help pull air from the scoop towards the filter
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Post by Steve B on Aug 1, 2020 17:18:47 GMT -5
Can you send some pics of the way you're hooking this up?
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