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vm carb tuning 78 gs 1000

  • Thread starter Thread starter lrgguy
  • Start date Start date
Looks nice, but I can't see inside the tiny passages where it's important. I guess we'll find out soon enough.
 
Did you flush the passages with lots of carb spray and air also...to flush out whatever the Pine Sol has dislodged and softened?????? Set the float hts???
 
Set the big idle knob as well. Touch it off to the throttle linkage then add about 1 1/2 to 2 turns. It may be a bit high but thats normal till you idle her down. And if it starts on choke but idles low after you turn the choke off it may even stall...just add another half turn to the idle knob and try again.
 
Inside looked cleaner then the outside ... and yeah rinsed , then pulled out all my picks and needles etc . Blasted every hole tunnel jet etc 10 times over , and blew it all out with compressor ! What I find handy is the needle you use to blow up footballs etc hooked up to compressor .. fine needle blasting air gets in most those tiny spots !!
 
Amnd yeah I set the floats to 24 mm . Measuring from rim below gasket ..
 
OHHH BABY !!! FIRED RIGHT UP !!
like what was said just had to adjust the big idle screw 1 turn ... idling right at 1100 rpm , if I turn the idle down to 1000 I start getting that rattle in the clutch basket .. which is going to be one of the next projects .. taking this girl out for aride and see how she behaves .. :D
Thx again to you both ..
 
Also a thx goes out to gatekeeper who has been suggesting things all along via text and his suggestion to use pinesol cuzz I had no carb dip .. he did offer his I will add . But the impatient bugger I am I had to move forward ... lol thx all:clap:
 
That rattle or CHUGGING is because you now need to vacuum sync the carbs and verify the timing is correct. The bench sync is intended to get the slides "close enough" to start and maintain it running. Now the fine tuning begins. Obviously the timing and syncing cant be done untill it will run and maintain itself..right???

Once you have verified the timing and the carbs are synced with gauges, you can then fine tune with the side mixture screws. If, after all that, you still hear a clunking, pull in the clutch lever and listen for the sound to change or even disappear. Dont worry about the clutch hub hut, springs in the back etc etc till your done with the tuning
 
chuck hahn said:
That rattle or CHUGGING is because you now need to vacuum sync the carbs and verify the timing is correct. The bench sync is intended to get the slides "close enough" to start and maintain it running. Now the fine tuning begins. Obviously the timing and syncing cant be done untill it will run and maintain itself..right???

Once you have verified the timing and the carbs are synced with gauges, you can then fine tune with the side mixture screws. If, after all that, you still hear a clunking, pull in the clutch lever and listen for the sound to change or even disappear. Dont worry about the clutch hub hut, springs in the back etc etc till your done with the tuning
Click to expand...

Awsome .. thank you !! Now just have to find someone local with the tool to do that .. as for the rumbling around in the clutch , that was there since I got the bike .. im thinking exactly that hub nut and springs rattling ..
 
lrgguy said:
OHHH BABY !!! FIRED RIGHT UP !!
like what was said just had to adjust the big idle screw 1 turn ... idling right at 1100 rpm , if I turn the idle down to 1000 I start getting that rattle in the clutch basket .. which is going to be one of the next projects .. taking this girl out for aride and see how she behaves .. :D
Thx again to you both ..
Click to expand...
Niiiice. I learned a thing or two here. :idea:
 
You may be right to some extent..but the majority will be well gone once the timing is set to be 100% sure thats spot on and the gauge synching is done. Then its time to turn attention to opening the case and do some clutch inspections.

One step at a time grasshopper.
 
Morrison said:
Niiiice. I learned a thing or two here. :idea:
Click to expand...

Yeah as too did I !! When people take the time to not only explain things but simplify the hole process , you realy feel as though you not only acomplished something , but learned a hole lot in the process !!
 
chuck hahn said:
You may be right to some extent..but the majority will be well gone once the timing is set to be 100% sure thats spot on and the gauge synching is done. Then its time to turn attention to opening the case and do some clutch inspections.

One step at a time grasshopper.
Click to expand...

Can express my gratitude enough .. ty
 
Just spent the last hr riding !! Bike runs like it has never run before , since I have owned it , and knock on wood ... smoke has not came out if the right exhaust as of yet , unlike it was before every time I came to a stop ...
Fourth gear there is a small bit of hesitation when you crack the throttle .. 5 th gear .... HOLD ON BABY !! :eek:
 
lrgguy said:
Just spent the last hr riding !! Bike runs like it has never run before , since I have owned it , and knock on wood ... smoke has not came out if the right exhaust as of yet , unlike it was before every time I came to a stop ...
Fourth gear there is a small bit of hesitation when you crack the throttle .. 5 th gear .... HOLD ON BABY !! :eek:
Click to expand...

The hesitation, how much RPM and how much throttle?
 
Spoke to soon ....:confused: smoke came out of the right exhaust pipe twice when stopped at lights on the ride home ... hoping a new petcock will rectify that!! Still getting a very small amount Iif gas in the vacume line after a 1 1/2 ride ... hope its not a head gasket or a valve seal ??:confused:
 
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