Mikuni CV Carb ?

[Retrosteve]

Hi folks ive just rebuilt the carbs on the 86 Gs 850 G but 1 question . The pilot jet next to the main jet , does this screw right down tight or is there so many turns out thats needed ?
Not the pilot air screw just to be clear .

[rphillips]

just snug it in. I've seen several strip the head off when trying to remove, thinking they were tightened too tight when installed.

[Retrosteve]

Ok thanks for that , ill get onto it pronto . Just waiting for the carb allen bolt kit then it will be time for its first start in 10 yrs

[KiwiAlfa156]

Tight enough not to unscrew themselves and fall out. This has happened to me because I was a little too gentle with them. Don't forget the black rubber caps that seal the pilot jets. Very important.

[Retrosteve]

Tight enough not to unscrew themselves and fall out. This has happened to me because I was a little too gentle with them. Don't forget the black rubber caps that seal the pilot jets. Very important.

Yes i have the 4 rubber plugs . The tiny holes in the jets were blocked so cleaned all them and glad i took them out as well as the main jet emulsion tubes as these were worse . Surprised it ran at all . Put new needle jets and seats in as the needle jets were worn quite bad . Reason i ask all this info was because its the first time ive ever fully dismantled a block of 4 carbs but in reality its pretty straight forward although time consuming . Therapeutic though

[Nessism]

Did you do a full and proper rebuild? Follow the tutorial linked in my signature? Replace all the O-rings? In particular, the pilot circuit needs to be cleaned. That involves remove the pilot screws, and soaking the carb bodies in a strong carb cleaning solvent. Just replacing the pilot jets doesn't clean the passages, and from what you say, your carbs are really scaled up inside.

[Retrosteve]

Did you do a full and proper rebuild? Follow the tutorial linked in my signature? Replace all the O-rings? In particular, the pilot circuit needs to be cleaned. That involves remove the pilot screws, and soaking the carb bodies in a strong carb cleaning solvent. Just replacing the pilot jets doesn't clean the passages, and from what you say, your carbs are really scaled up inside.

I did take them apart fully to the bare shells and had all the orifices that were gummed up emulsion tubes pilot jets and air jets ect . Replace all the o rings that had gone hard .
Ill be running stock air filter even though i have some k&N pods from an older project . There were some adaptor air seal grommet things that supposed to fit in place of the o rings to the t pieces but they are too tight to plug into the carb boddies .

[Retrosteve]

Not sure where these go , there is 6 of them :
DSC_0064.jpg

[Nessism]

Not sure where these go , there is 6 of them :
DSC_0064.jpg

Those are for VM carbs. They attach to the fuel inlet Tee and transfer tubes.

[Retrosteve]

Those are for VM carbs. They attach to the fuel inlet Tee and transfer tubes.

Thank you very much for letting me know Nessis:n . They came in the box of spares when i got the bike so they will go back in the box

[Retrosteve]

Hi people , another question.
Ive only 3 of these , they came with the air box .. where do they go ?
DSC_0071.jpg

[Rich82GS750TZ]

Don't think we had a GS850 in '86 in the US, but it's likely like this image from an '83. Inside the airbox boots. see # 9
https://www.partshark.com/oemparts/a...c8/air-cleaner

[Retrosteve]

Don't think we had a GS850 in '86 in the US, but it's likely like this image from an '83. Inside the airbox boots. see # 9
https://www.partshark.com/oemparts/a...c8/air-cleaner

Thanks , so i guess these are a kind of support for the boots to stop them getting crushed .

[Rich82GS750TZ]

That is my understanding.