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1980 GS450 Carb sync

  • Thread starter Thread starter apopleptic
  • Start date Start date
Ouch! That had to hurt! It was bad enough when I slammed the skin of my thumb with a makeshift slide hammer and nearly severed a chunk there...

Anyway, the screws in FC's carb rebuild are definitely right, standard M4, M5, and M6 threads on them.

I did the M4's and M5's on mine but didn't bother with the M6's and I had no troubles at all just asking for M4 and M5.

That carb does look nice and clean too actually, but if you have some carb cleaner around you may want to spray some through the passages just to be sure.
 
The choice is yours after all so if you think they are okay than don't worry about it. Just know there are passages in there you cannot see and if those are clogged you'll have issues. At the very least, I would spray into each hole and make sure stuff comes out the other ends.

Sorry to hear about your thumb. Hope everything works out for you.
 
I have confirmed that all the passages are clear of obstruction, and I have began the reassemble by putting the chokes back together and mounting both carbs back on the bracket and doing a bench sync to make sure the throttle valves are spaced as close as I can get them. The screws that seemed questionable have gone in with some resistance, but I guess probably ok. none stripped and anti sieze was used. The o-ring's didn't come in the mail today so I guess I am going to be sitting home all weekend. Hopefully Monday those o-rings get here by mail so I can finish and put the arb back on. Then when I get the call I can go get the rest of my parts from across town.
 
Waiting for parts can be so frustrating, but at least usually the wait is worth it :)
 
so very true. I have a feeling that is I had known about those rubber sleeves that went between the airbox and the carb I may never have had a problem with this bike. unfortunately they aren't actually shown in that blowout diagram of the airbox. well, they do have a number pointing at them, but usually something like that would be shown outside of the airbox in a diagram like that. I hate having to look at the bike as emergency transportation, but I wish it would fill that role for me right now.
 
I hear ya and I found exactly the same thing with the fiche not being clear.

Given the years between pulling the carbs off and then doing the cleaning, I had these strange rubber things attached to the carbs that I didn't know what to do with.

Ended up posting a question on here about what they were because it wasn't clear in the diagram, so it is definitely a bit confusing, and yes I suspect you're right as they have a big impact on your intake working right from the air box.

It's definitely a bummer not having transport too, so hopefully once you get those O rings you'll be all set.
 
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