Synch vs Balanced

[fastpakr]

A carb can certainly go out of sync over time, so the answer to the question as stated is no. Not 'once sync'd, always sync'd. But it's a function of being bounced around on the bike and screws self adjusting from vibration, throttle plates wearing, etc. Not related to the engine.

You can rebuild a carb rack, synch it, toss it in a box (carefully packed, of course) and ship it anywhere in the world for someone else to mount on their bike. A member on one of the other forums I'm involved in has been doing that for other members for years.

[Steve]

If you balance a carb rack on one motorcycle, it will be perfectly synchronized when pulled and installed on another.

In a perfect world, yes. However, I am stuck in this world.

Differences in valve adjustments will subtly change how much a particular cylinder will draw. If one bike has different clearances on the valves, it will draw just a bit more or less air, which will affect the vacuum level.

Doing a vacuum sync on a bike then shipping the carbs will at least assure you that they are very close, but I would not guarantee them to be exact.

.

[Dave8338]

In a perfect world, yes. However, I am stuck in this world.

Differences in valve adjustments will subtly change how much a particular cylinder will draw. If one bike has different clearances on the valves, it will draw just a bit more or less air, which will affect the vacuum level.

Doing a vacuum sync on a bike then shipping the carbs will at least assure you that they are very close, but I would not guarantee them to be exact.

.

AAAGREEEEED.

If close is what you're after, close it is. To tune an engine "perfectly", it ALL has to be done as a package deal, with that individual engine.

Even variance in spark plug gap, plays a factor...

[Calvin Blackmore]

OK i was mistook
I was wrong and obistantate in my obstinancy


I was harping on a theoretical notion not disputing a very well known fact


carbs is delicate
need to be balanced

and any signifigant differantion among the rack will cause major performance problems

[Calvin Blackmore]

AAAGREEEEED.

If close is what you're after, close it is. To tune an engine "perfectly", it ALL has to be done as a package deal, with that individual engine.

Even variance in spark plug gap, plays a factor...

my ogd man nothing in the physical world is within the magical perfect spec

[Dave8338]

my ogd man nothing in the physical world is within the magical perfect spec

I am, but but but...as noted at birth, I am an anomaly!

[Calvin Blackmore]

I am, but but but...as noted at birth, I am anomaly!

happily anomaly loves company


cos in our english culture it rhymes so very very nice

[Dave8338]

happily anomaly loves company


cos in our english culture it rhymes so very very nice

NICE!

[BIKERTUCKER]

WOW ..... Have been away from the site for a while. Proof that drugs and motorcycles are a poor mix.