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Clutch chatter and poor low end performance.

  • Thread starter Thread starter 80s cars or gtfo
  • Start date Start date
80s cars or gtfo said:
Do you think just breaking them down and chem dipping is enough? I can't find a good walkthrough on this site or on basscliffs site with a working link. I'm not confident in my carb knowledge to go in to something like this blind.
Click to expand...
Start here: http://www.thegsresources.com/carbclean.php
And http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf

Also make sure the rubber plugs are in place over the pilot jets. It is likely a member is near enough to volunteer to help sync the carbs. A very minute change can make the difference between a sweet running bile and a turd.
 
Thanks for the links here is a pic of the no.1 float bowl before cleaning. As you can see it is very clean already almost as if it had been cleaned recently. The float retaining pin was also only barely set in snug and came out with a light push with out having to do the supporting it thing, like it had just been removed recently.1526778620245-1665609774.jpg
 
Well FML (frick my life), the pilot screw in the no.2 carb rounded. 15267787847171081485305.jpg
On the up side, I'm kind of a badass when it comes to removing rounded screws(I still always switch Phillips to socket cap when I can though, I'm not crazy) on the down side I'm guessing pilot jets aren't cheap and I'm positive they aren't free. Where am I even going to be able to find these?
 
Why is the no.3 diaphragm spring shorter than the rest??? The wire also appears slightly thicker... If only I had a good caliper... Oh wait I do! The no.3 spring's wire measures .032" and the other three are .029". something from the PO or is this normal?1526781839894-1539712747.jpg
 
I was reading the numbers on the Jets and reading up on the $120(makes me cry) dynojet kit and saw that the dynojet stage three kit main jet is 138. My current jets are all 138. I couldn't find dynojet specs for their other jets but my air jets are 170 and pilots are 47.5. anybody know the dynojet stage three jet specs? Wouldn't it be the best if the PO already installed it? Well it's been a long day but I have the carbs completely broken down as per bobgrogers advice. When I have the money I'll be ordering the orings and the carbdip. Will berrymans b-12 chemtool work instead of carb dip? I already have a few bottles of that stuff lying around.
 
Care: Dynojet numbers and Mikuni numbers cannot be compared. They are not using the same measurement system.

I would tend to stick with the Dynojet product as you have non-standard pods and pipes.
 
londonboards said:
Care: Dynojet numbers and Mikuni numbers cannot be compared. They are not using the same measurement system.

I would tend to stick with the Dynojet product as you have non-standard pods and pipes.
Click to expand...

I probably should have posted this but I dug around for the previous owners phone number and asked him and he confirmed that it is already dynojet stage three. So I'm just going to do the dip, new orings and new pilot jets to replace the two that stripped upon removal. The no.3 carb which stripped upon removal looked like it may have had yellow fuel residue in the jet but it could have just been some brass from forcefully removing it.
 
80s cars or gtfo said:
I probably should have posted this but I dug around for the previous owners phone number and asked him and he confirmed that it is already dynojet stage three. So I'm just going to do the dip, new orings and new pilot jets to replace the two that stripped upon removal. The no.3 carb which stripped upon removal looked like it may have had yellow fuel residue in the jet but it could have just been some brass from forcefully removing it.
Click to expand...
138 is a DJ number, Mikuni goes in 2.5 stamps. Also the 47.5 pilots indicates the jetting was already changed from stock (which is 45). Needle jets should be close to the middle and using Pods.

after moving to AZ my carbs would dry out plugging the pilot jets. I eould pull the carbs, pop off the bowels and using carb cleaner spray blowout all the passages including the pilot jets. Would run find after that. Realize this was after 6 months on s clean setup not years of gunk and tarnish.
 
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