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popping in the exhaust-carbs?

  • Thread starter Thread starter bubby
  • Start date Start date
old vet i think it might be the angle i seen your post and checked all four screws the screw on the side of the carb is 1 and 1/4 turn out from seated position on all 4 carbs there is a line in the carb casting that the flat head notch in the screw is lined up with ......... the only other screw i see on the bottom of the carb is what i thought was the drain screw if you loosen that fuel comes out the hose the screw and hose im talking about can be seen in the top picture on cowboyup3371's post #12 of my pictures when i said air fuel i assumed that the screw adjusted the mixture witch it does but i think only the air flow some one correct me if im wrong.... i may be lol
 
the manual i have just says gs 750 service manual not sure which questions dont pertain to my 77 750 and you should have seen them before i cleaned them with mineral spirits, carb cleaner, and compressed air they where bad but my focus was more on cleaning the internals... if you know of a better method i would like to hear it besides a ultra sonic dip witch i didn't do but thats my plan if i can find some 1 who has a ultrasonic cleaner .....
 
OK, You have basically just cleaned the surfaces of the carbs that you can see. Carb cleaner and compressed air will not clean the internal passages. They have to be totally disassembled and soaked in carb dip and then replace all the O-rings. The inside passages look like a plumbing commercial. When you dip them you will be able to see the this stuff as it melts before the dip gets too dirty to see it floating out of the carbs.
 
the carb dip is good stuff? i should be able to get that from a local parts store rite is it called carb dip and is there a brand name that works better than others.... the stuff i found is chem dip carb and parts cleaner $23 for 3/4 of a gallon pricy stuff lol
 
You can get it from any auto parts or even Wally World. The most popular brand is Berryman's, but I suspect any brand will do. Probably made in the same factory and rebranded to suit the trends.
Yes, it is pricey. And it works. And you can keep it around to do more carbs (yes, others will know) so it is not a one time throw it away type experience.
 
AND...while you have them off the bike for a proper cleaning, check the inside diameter of the throats ON THE ENGINE SIDE. This will tell you what VMXX they are. Some pics of the bottom of the carbs ( unless i missed them somehow ) would help too. If they have that tamper proof plug youll want to remove that so you can get the pilot screws out so the carb dip can get thru there as well. This will allow you to replace the oring that is "usually" on them.
 
ALSO....Check the exhaust gaskets at the head and pipe joints for any leaks. Leaks and holes allow cold air to be sucked in on decel and that too causes popping.
 
Not sure what motorcycle those carbs are from, but if whoever put them on your bike didn't jet them correctly for your engine there will be problems until it is done.
 
im thinking about putting gs 850 carbs on it yay or nay?? i have a set that my buddy gave me i wasnt sure if this was a good idea or not... im putting a dyna ignition on it (waiting for the kit to be delivered wed) and i im gonna get some pods for it to
 
If it were mine, I would get a stock set of the original VM26 and get it straightened out. Maybe PM The Cafe Kid as he seems to have a bunch of stuff in the bin.
 
bubby said:
im thinking about putting gs 850 carbs on it yay or nay?? i have a set that my buddy gave me i wasnt sure if this was a good idea or not... im putting a dyna ignition on it (waiting for the kit to be delivered wed) and i im gonna get some pods for it to
Click to expand...

Pods are an absolutely terrible idea if you don't know how to work on carbs. You WILL have to rejet for pods, and if you don't know how to do that, I'd suggest not attempting it until you have a better understanding.
As to the 850 carbs, the only model year 850 that would have carbs that will fit your bike was the 79 GS850. There again, the jetting will be slightly different, so that may not be a good idea either. I'd find some correct, stock carbs if I were you. And no, I don't have any I'm willing to part with.
 
VM 26 850 carb bodies are the same, You'll have to get the appropriate jets needles etc. Basscliff had posted a chart for the GS series. I don't remember where I put it at the moment.
 
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