Mystery Carbs

[cajun31]

Just get the carbs squared away and get them mounted back up. The bike will run or not run just from there before you have to talk about replacement parts. That is where I would be with it. Best place to start and then once you and your friend hear it run then he can decide what else he wants to spend money on. What kind of shape is the bike in other than the carb problems?

[autotech44]

Just get the carbs squared away and get them mounted back up. The bike will run or not run just from there before you have to talk about replacement parts. That is where I would be with it. Best place to start and then once you and your friend hear it run then he can decide what else he wants to spend money on. What kind of shape is the bike in other than the carb problems?

Parts are ordered. I'll get it running and see where it's at. Looks like he bought it with all 4 needle/seat leaking like a sieve so it's never run good enough to determine other problems. Excessively washed down cylinders is what I'm worried about at this point.

[DiverRay]

If you are worried about the cylinders, drain the oil and replace the oil filter, re-fill with 20w50 Castrol or another good brand of NON synthetic motor oil. Then pour about 3 ounces of Automatic transmission fluid into each spark plug hole. Rotate the engine by hand twice and let set for a day or two with spark plugs just threaded in a little bit.
Before trying to fire for the first time, pull the spark plugs and rotate the engine with the starter. Don't forget to put a rag over each plug hole, or ATF will be all over the place. Then put the plugs in and see what happens. Prepare for some smoke at first from the ATF.

[autotech44]

If you are worried about the cylinders, drain the oil and replace the oil filter, re-fill with 20w50 Castrol or another good brand of NON synthetic motor oil. Then pour about 3 ounces of Automatic transmission fluid into each spark plug hole. Rotate the engine by hand twice and let set for a day or two with spark plugs just threaded in a little bit.
Before trying to fire for the first time, pull the spark plugs and rotate the engine with the starter. Don't forget to put a rag over each plug hole, or ATF will be all over the place. Then put the plugs in and see what happens. Prepare for some smoke at first from the ATF.

I think it's too late for that. I'll just change the oil and crank it to get oil flung up on the walls before I fire it. There was more gas in the crankcase than oil. And #2 plug hole only has a few threads left so I don't want to remove it again.

[DEEBS11]

https://www.ebay.com/itm/198260636423?_skw=helicoil+14mm+sparl+plug&epid=658591277&itmmeta=01KNW6Y0QW0WWWDQ505Y9EEHA8&hash=item2e29413b07:g:ThoAAeSwvlZp1Bre&itmprp=enc%3AAQALAAABAGfYFPkwiKCW4ZNSs2u11xDlTubvaIKGmSwWyoOKP7UsTCTqqM65ieooqUu8yYr%2BE40QYQgnGNQ%2BWPJ2oNjOjDgc50W1T0mLHcjtVDETpzJYXV46mbpeSH6dgvC10OmPkonwEzXW6z5xqqdqkTB6FR9j2r6%2Fx7b3%2F5kTN1buhYGcRYx2jGTmoOSj2BXd4euGEHHV8i%2FcT0zw8e3Sxgx9KwVqNAM%2F1Gn0%2FHVDBuqfXI7bG%2Fq53nzjfy4jVZuzkEXCugq7r4TUSBkMzbudEOBWI5np0CCw%2FyBKmm6PlOVrqFFJlTAhh8vk46ig%2BQHceiWXoJVhXBtu7yoqsyu%2B1TaeDTA%3D%7Ctkp%3ABk9SR_KM-IavZw

[autotech44]

https://www.ebay.com/itm/198260636423?_skw=helicoil+14mm+sparl+plug&epid=65 8591277&itmmeta=01KNW6Y0QW0WWWDQ505Y9EEHA8&hash=it em2e29413b07:g:ThoAAeSwvlZp1Bre&itmprp=enc%3AAQALA AABAGfYFPkwiKCW4ZNSs2u11xDlTubvaIKGmSwWyoOKP7UsTCT qqM65ieooqUu8yYr%2BE40QYQgnGNQ%2BWPJ2oNjOjDgc50W1T 0mLHcjtVDETpzJYXV46mbpeSH6dgvC10OmPkonwEzXW6z5xqqd qkTB6FR9j2r6%2Fx7b3%2F5kTN1buhYGcRYx2jGTmoOSj2BXd4 euGEHHV8i%2FcT0zw8e3Sxgx9KwVqNAM%2F1Gn0%2FHVDBuqfX I7bG%2Fq53nzjfy4jVZuzkEXCugq7r4TUSBkMzbudEOBWI5np0 CCw%2FyBKmm6PlOVrqFFJlTAhh8vk46ig%2BQHceiWXoJVhXBt u7yoqsyu%2B1TaeDTA%3D%7Ctkp%3ABk9SR_KM-IavZw

Not touching anything else until I hear and see it run. Crank seal leaking bigtime also.

[autotech44]

OK. There are plugs that go straight down to the bore from the bowl surface? #1 Is partially drilled and #2,3 & 4 are drilled all the way through. Why would someone drill them out? Is it possible they were mistaken for the mixture screw caps? I guess the only issue is turbulence at the holes since the top is sealed with the gasket.

[cajun31]

OK. There are plugs that go straight down to the bore from the bowl surface? #1 Is partially drilled and #2,3 & 4 are drilled all the way through. Why would someone drill them out? Is it possible they were mistaken for the mixture screw caps? I guess the only issue is turbulence at the holes since the top is sealed with the gasket.

Don't take this the wrong way but he must be a good friend. I have never messed with the Dyno Jet kits but I do know that they come with a drill bit. The only person that can answer "Why?" would be the person that did the drilling. Curious thing is why just 3 of them and not all 4? Were you planning on getting the jb weld that Marty recommended to you? Might be good for sealing those holes back up. The closer you get back to original to begin with the better. It's no wonder why others gave up on those carbs. They may still be salvageable though.

[bikerphil]

The drill bit with the Dynojet kit is to drill the diaphragm slide hole in the bottom of the piston. It's 4mm.

[autotech44]

Yep. I just don't know if jb weld is worth the effort. And it's the putty version which is difficult to work with. Wish I had new plugs.