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Carbs and Fuel System
From the gas tank to the carbs
All fuel system discussion

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post #41 of 56 (permalink) Old 05-21-2020, 12:08 PM
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Yes the shipping is going to sting.

Arctic Cat and Harley have the same carb. Should be able to find jets below $10 each pretty easily, haven't looked for a while.

Stock jets? Maybe someone here has a pair?
yes stock jets and the carb rebuild kit i ordered dont have them in it. Typical. 62 euro from the netherlands for the 2 of them. 😲. I might check for harley ones. Might be easier to get. Is there a specific model i should search?
Pretty sure Sportster used this carb. Go by our carb model. CVK36 or CVK38, double check me on that.

Can also look for biggest Arctic Cat in the final years to have a carb. Snowmobile or ATV.

There's also websites dedicated to the CVK carb.

2003-21k mi
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post #42 of 56 (permalink) Old 05-21-2020, 12:27 PM Thread Starter
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Ok thank you spockster i will check it out
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post #43 of 56 (permalink) Old 06-04-2020, 04:38 AM Thread Starter
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Ok so recent update:
Lots done to find the problem. Carbs rebuilt. All new gaskets, jets etc.
Compression check: Ok
Fuel tap rebuilt.
New plugs.
Valve check: Problem with front cylinder.
So far this is what was wrong. Opened the cylinder cover and cam cover. Took off the tensioners and removed cams. ( making sure it was tdc and marks aligned. (Turned engine by hand)
2 of the cam guides that sit on the lash adjusters had fallen off. It must have happened when i put the cams on the first time without me realising. So spockster you were right about the valves.
I have yet to fire it up as it was late last night when i finished putting it back together. The whole procedure was done with the engine on the bike. Took about an hour in total. I will post the outcome later.
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post #44 of 56 (permalink) Old 06-04-2020, 06:38 AM
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Thanks for the update. So you were able to pull the valve covers without pulling the engine.. Always thought that might be possible, but never confirmed it.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #45 of 56 (permalink) Old 06-04-2020, 04:34 PM Thread Starter
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Thanks for the update. So you were able to pull the valve covers without pulling the engine.. Always thought that might be possible, but never confirmed it.
Yes only on the front. Was a bit tricky but i managed it. So went to start the bike today after work and nothing. Eventualy got it to run with a shot of starter fluid. It idled great on both cylinders but i was still not able to rev past 2k or it would bog and die. Lots of popping and backfiring. I wonder would it have anything to do with the exhaust system maybe? I have the gb removed so pipes are just straight from the head to the rear mufflers. Its all i can think of as im out of options. I think its time to bin this engine and try and find a replacment as my paitence have worn out with this one. Any last ideas before she goes for the scrap heap?
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post #46 of 56 (permalink) Old 06-04-2020, 06:06 PM
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If you use the choke while trying to rev it up, what does it do?

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
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Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #47 of 56 (permalink) Old 06-05-2020, 01:41 AM Thread Starter
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If you use the choke while trying to rev it up, what does it do?
the exact same thing. If i give it choke once it idles for a bit it will try to cut out
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post #48 of 56 (permalink) Old 06-05-2020, 07:03 AM
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It's still popping after putting the rockers back in place?

Any chance they could have fallen off again?

Did it pop out of the exhaust, intake, or both?

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #49 of 56 (permalink) Old 06-05-2020, 08:29 AM Thread Starter
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It's still popping after putting the rockers back in place?

Any chance they could have fallen off again?

Did it pop out of the exhaust, intake, or both?
yup still popping and backfiring. Even harder to start now. Im starting to think my timing might be off some how. Altho i made sure it was 305*. It has to be either timing or carbs. I will check the timing over the weekend
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post #50 of 56 (permalink) Old 06-05-2020, 08:34 AM
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Could you tell where it's popping from? Intake, exhaust, or both?

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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