Throttle body sinc.

staq50

Member
Joined
Oct 13, 2019
Messages
72
Location
Hawkes Bay, New Zealand
Hey, had this S10 for a couple of weeks now and been looking at the process of sincing these T.bodies, and to me seems a little backward?? wondering why we have one closed air/vacume blanked off (RHS) and other operating the vacume switch....thinking here why are these not equalised vacume points? so, I linked both together, and from the centre of that link i put a 'T' connection to run another line to the switch, backed out both air screws to 1/2 turn ......, and hey......makes a BIG difference to my off the bottom throttle response instantly, it has way less hesitation, revs faster.... just seems straight forward to equalise the bodies and low speed throttle pulses in this way...Has anyone else done this? my bike is stock, 2012, only slight mod is I have jumped the clutch switch.........I have also done this mod on my Japanese multies cyl. bikes with varing degrees of responces...any feed back here over this?
 

RCinNC

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Aug 30, 2014
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2,816
Location
North Carolina

Gigitt

Active Member
Joined
May 15, 2015
Messages
427
Location
Sydney Australia
Interesting idea. Trying to wrap my head around it. But are the throttle bodies synched with this mod?
technically they are not synced, but now equalised to each other. linking the TB with a tube can work, I've tried it on my Versys 650 but reverted back to unlinked.

By linking the TB you are trying to equalise the air each needs from each other, if one cyl is down on vac then it takes a bit from the other. as the bleed screws are not wound out much and the tube is small ID, you limit the air movement between cyl in the hose with the bleed screws. You need small 'restricted' air movement as opening the screws up too much throws it way out.

Thats the jist of it.
 

jbrown

Active Member
Joined
Sep 25, 2012
Messages
373
Location
Novato, CA
Are the throttle butterflies cable or servo driven?
The butterflies are on a common single shaft, driven by a servo motor. There is a cable driven accelerator position sensor and a throttle position sensor mounted on the throttle body. The throttle "sync" adjustment is not the old school synching of separate butterflies. It is simply an air bypass adjustment to equalize idle airflow past the butterflies (that inherently have slight variations).
 
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