Vacuum screw on Intake Boots

[Big_Z]

what size is the screw/adapter on the intake boots that is used for synching carbs? Z1 lists 5mm and 6mm adapters and I'm not sure which i need.

1980 GS850G

Thanks,

Aaron

[rapidray]

It could be either. Unscrew one & measure it. DON'T lose the copper washer behind it! Ray.

[lurch12_2000]

what size is the screw/adapter on the intake boots that is used for synching carbs? Z1 lists 5mm and 6mm adapters and I'm not sure which i need.

1980 GS850G

Thanks,

Aaron

My 1100G is 6mm, but you should measure to be sure. I think most carb synch tools come with both sizes, unless you're making a home made tool!

[Steve]

My 1100G is 6mm, but you should measure to be sure.

Are you sure it's 6mm?

My mercury sticks only have 5mm fittings and I have been able to do 450, 550, 650, 750, 850 and 1100 so far.

.

[Sandy]

Pretty they are 5mm and most Yamahas are 6mm.

[rapidray]

I have done Suzukis for a LONG time & seen BOTH sizes on different bikes. Not both sizes on one bike but different bikes that some were 5mm, & some were 6mm. Ray.

[Nessism]

So far I've done GS450, 550, 850, 1000E, 1000G, 1100L...and all were 5mm.

[lurch12_2000]

Are you sure it's 6mm?

My mercury sticks only have 5mm fittings and I have been able to do 450, 550, 650, 750, 850 and 1100 so far.

.

Steve, you're right!
I double checked and I have the 5mm brass adapters.
Two 3 1/2" length for inner 2 carbs and two 1 1/2" length for outer carbs.
Sorry for misleading anyone.
Hopefully you can check my carbs when you're out here in a few weeks and see if I did it right

[Steve]

Hopefully you can check my carbs when you're out here in a few weeks and see if I did it right

I'll bring my sticks.

[bwringer]

I know they're 5mm on all shafties.

5mm on the few chain drive models I've encountered, too.