Carb Sync Preferences??

Sunday Rider said:
I’ve used the SK Syncrometer since I’ve owned my ST. It is fast to do and you get better at it each time you use it. You get to learn the sound of the bike when all 4 carbs hum in unison. Good luck.
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Does less bodywork have to come off if I’m going to use the syncrometer? If that’s the case it would 100% be worth it haha
 
SpoogyWoogy said:
Does less bodywork have to come off if I’m going to use the syncrometer? If that’s the case it would 100% be worth it haha
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Not really less work, you have to take the air filter off which means the fake gas tank cover comes off, the seat and the sides are coming off. It gets you acquainted with that Tupperware dance and why is there an extra screw left over? Or did I just drop one of them under the carbs?
 
Ah got it.
Not looking forward to pulling off the full sides and pockets/ cubbies. Seems like a right pain lol!
I decided to just get one to see what it’s like, but I’ll have to do an inspection of the water pump beforehand since if that’s leaking I’ve got bigger fish to fry at the moment than running as smooth as possible haha.
 
SpoogyWoogy said:
Ah got it.
Not looking forward to pulling off the full sides and pockets/ cubbies. Seems like a right pain lol!
I decided to just get one to see what it’s like, but I’ll have to do an inspection of the water pump beforehand since if that’s leaking I’ve got bigger fish to fry at the moment than running as smooth as possible haha.
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Nope, about a 10 minute job with practice ... ;)
If you replace the 10mm hexheads on the lower side of the gas tank shelter with the proper socket heads and
replace the big side panel screwheads with 90112-MT4-000 Smooth side cowl bolts, you can remove all of it with a 5 mm t-handle and a JIS screwdriver.
 
Uncle Phil said:
Nope, about a 10 minute job with practice ... ;)
If you replace the 10mm hexheads on the lower side of the gas tank shelter with the proper socket heads and
replace the big side panel screwheads with 90112-MT4-000 Smooth side cowl bolts, you can remove all of it with a 5 mm t-handle and a JIS screwdriver.
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Smart!
I’ll have to see what I have lying around.
Will see how it goes tomorrow!
 
St-Gerard said:
Air cleaner can stay on, what has to come off ,Seat, side cases, side covers ,top cover, side vents,gray storage panels, in that order. As Uncle Phil said, with practice 10 minutes. Synched mine Three days ago.
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Def worth getting the practice in!
Thanks!
 
Sunday Rider said:
Have a look at this video, it should be helpful.
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Ah yes, I’ve seen this one. Since he’s using that sk style syncrometer there aren’t any details on where the vacuum lines are.

Will take a look through the pdf service manual I found online. Just wish I had a physical copy :’( lol
 
My 2¢ - opinion only. I've not seen or used a Digisync, the Optimate, or a Carbtune. The last, iirc, has solid metal sliders in tubes, and if the unit is not perfectly vertical, they can bind throwing off the readings. I like that Optimate tells you the accuracy of their unit is 0.5cm Hg. That translates to 2/10 of an inch. Having used carb stix with mercury in the tubes that is accurate enough. I was turned off by the DigiSync website...they spent a lot of time and money designing it but provide little to no hard information - specifications, if you will. Again, my opine only. The cat's pajamas was a setup that a Guzzi Dealer brought to a North Bay, Canada rally. He had a set of 4 precision vacuum gauges set up on a board with enough valves and hoses to make a nuclear power station technician happy. He told me how much it cost, and it was in the hundreds of dollars - 20 years ago.
 
SMSW said:
I like that Optimate tells you the accuracy of their unit is 0.5cm Hg.
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Practical, versatile kit...

I however see the carb sync only as the very last item of the tune-up...

- valve clearances checked
- new spark plugs installed, HT leads inspected
- cab bank fully inspected, cleaned and pre-adjusted (jets clean, idle screws set)
- new carb insulators installed
- all vacuum lines inspected (all possible leaks, like a ruptured diaphragm of fuel auto valve, eliminated)
- new air filter installed

I also place two office fans in front of the bike, to keep the engine near ideal temps as long as possible...
(once really hot the engine runs rich, thus starts to 'stomp' and hunt in idle...)

on older bikes the carb linkage itself can be a bit worn/loose, shafts might draw some false air, etc...
 
ST1100Y said:
Practical, versatile kit...

I however see the carb sync only as the very last item of the tune-up...

- valve clearances checked
- new spark plugs installed, HT leads inspected
- cab bank fully inspected, cleaned and pre-adjusted (jets clean, idle screws set)
- new carb insulators installed
- all vacuum lines inspected (all possible leaks, like a ruptured diaphragm of fuel auto valve, eliminated)
- new air filter installed

I also place two office fans in front of the bike, to keep the engine near ideal temps as long as possible...
(once really hot the engine runs rich, thus starts to 'stomp' and hunt in idle...)

on older bikes the carb linkage itself can be a bit worn/loose, shafts might draw some false air, etc...
Click to expand...
How often do you perform a tune up like that? That’s very thorough.
 
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