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Post by eman on Jun 5, 2016 12:46:28 GMT -5
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Post by eman on Jun 4, 2016 20:35:05 GMT -5
Ok, so this is a China clone of a Japanese keihin. From the article you linked it still looks like a good carb according to 1fastqmb's last paragraph.
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Post by eman on Jun 4, 2016 19:37:14 GMT -5
The carb I linked at Amazon has Keihin cast into it. Wouldn't that be an actual Keihin?
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Post by eman on Jun 3, 2016 7:04:46 GMT -5
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Post by eman on Jun 3, 2016 7:01:13 GMT -5
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Post by eman on Jun 2, 2016 19:22:05 GMT -5
I'm done fooling around, just need my scooter to run right. What carb do you recommend for a stock scooter with a stock air filter and stock exhaust?
Any difference in the carbs that are available on ebay or Amazon?
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Post by eman on May 31, 2016 8:31:54 GMT -5
Is there a jet/drill size chart? Jets have no numbers on them, I've looked with a magnifying glass. To jet up I need to know where I'm at.
Stock replacement carb is all I would buy, just what is a stock replacement. I don't know if this is the original carb.
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Post by eman on May 30, 2016 21:39:07 GMT -5
OK, adapter came so I ck'd compression 120psi cold. Squirted a little oil in the cyl and it rose a pound or 2. Valves are sealing fine, reck'd valve adjustment cold .004in.
I ran scooter this weekend and it didn't want to run. Would stall, wouldn't start hot or cold at times. When it did run it would run like it was starving for fuel. I disassembled carb. I found the o-ring at the top of the needle looked bad and it has a washer under the clip that sits on the o-ring. I removed the washer and installed a new o-ring. Clip is in the middle groove. Disassembled everything and cleaned all passages and blew out with air. There was no dirt at all, all passages were clear. Intake manifold is perfect and so is the insulator under the manifold. Put it back together and it started but did stall while idling for a short time. Adjusted idle mixture and speed. It will hunt a little at idle. On cold start it doesn't have any fast idle, idle speed doesn't change as it warms.
Problem is definitely fuel. If I want to buy a carb which is best and where to purchase?
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Post by eman on May 23, 2016 9:15:18 GMT -5
Again I appreciate the help. I've got a handle on the A/F ratio deal. I use this scooter as a pit bike for my drag racing.
Are these scooters very prone to carbon buildup from heat? Any recommended ways to prevent carbon? On generators I've used Seafoam mixed with the gas.
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Post by eman on May 22, 2016 20:42:52 GMT -5
Stock air filter and box. Mixture adjustment is at 2 1/2, been to 3. I don't have a 0mm adapter for my compression tester so I ordered one. I have sprayed carb cleaner around manifold and adapter with no change. Once I verify compression I'll go from there.
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Post by eman on May 22, 2016 16:52:04 GMT -5
Used 50cc scooter that is hard starting. Battery is new and fully charged. Cranks over great and valves are adjusted properly. Runs good once started. Start problem appears to be fuel problem. Carb has just been removed and cleaned, new air filter and fuel filter. When carb was disassembled electric cold start unit was bench ck'd and is working and voltage and ground to electric cold has been verified. I have no idea if this is the priginal carb as scooter was well used before I bought it. If you turn the throttle a few times before cranking, actuating the acc pump it will start and stall, if repeated it will stay running. Once running and hot it will still give trouble restarting. Adjusting the idle mixture as per instructions on this site has made hot start better. I did see on the Scrappy Dog site they list larger idle jets for hard to start scooters.
Should I be looking at jet replacement or carb replacement? If carb replacement which one and where is a good place to purchase?
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Post by eman on Feb 21, 2016 18:55:05 GMT -5
50CC Gator scooter with a CVK carb. I bought a rebuild kit so I could disassemble and clean the carb. When I removed the cover and the diaphram I then removed the screw from the center and the retainer for the needle. Needle had the slotted washer in the center groove. Under the slotted washer was an o-ring. Is that all that is supposed to be there? Kit came with a silver washer approx same size as the O-ring, does it belong on the needle?
How do you size the jets, there are no numbers stamped on them. Main jet is .032 in measured with a drill bit. Is there a sizing for the idle jet?
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Post by eman on Feb 8, 2016 8:45:32 GMT -5
I've looked at Scrappy Dog and ebay. I can find complete air filter box assy with that hose but not the hose separately. How much would changing to a small air filter effect performance? Will it require carb rejetting?
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Post by eman on Feb 7, 2016 16:54:46 GMT -5
On my Gator scooter the air filter box has been broken and repaired and the hose that attaches to the carb is cracked. Is this hose/elbow available seperate or do i need a whole air filter box? Is there another air filter alternative? Also the accelerator pump doesn't give much of a squirt.
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Post by eman on Jul 21, 2014 11:32:00 GMT -5
Had a few minutes this morning to look at the scooter. The vacum line from the manifold to the vacum petcock has a T in it. the T'd line runs to some sort of ck valve. I tested the ck valve and it doesn't hold vacum good. There's a ball or something isnide and if I shake it it will hold vacum sometimes. I have no idea what this valve is for so i'm eliminating it to see what happens.
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