Bogging down GS1000 c/w VM's - fixed!

[Jackbob]

Hi thought i would share this as ive seen a few posts recently that have similar issues.

To cut to the chase i have had lots of problems getting my bike to carburate cleanly - it was bogging down badly + stalling when twisting the throttle into the midrange area.

It seemed to be leaning out or running out of gas, but i actually think it was too rich low down and too lean at the top end (so i have gone up a couple of main jet sizes and it seems better up there too).

Here's what i did;

1) removed the pods i had fitted
2) set the needles back (lower) to the standard position (3rd notch)
3) refitted an original air box with standard suzuki paper/oiled foam element and oiled it (the foam outer that is).
4) replaced air box lid and its seal.

Now good.

FYI even with a K&N GS1000 specific free flow filter in the standard airbox with the lid on it wouldnt accelarate without bogging its that critical apparently.

Cheers

[KiwiGS]

Sweet!
Glad to see you got it sorted.

Cheers

[TheCafeKid]

Hi thought i would share this as ive seen a few posts recently that have similar issues.

To cut to the chase i have had lots of problems getting my bike to carburate cleanly - it was bogging down badly + stalling when twisting the throttle into the midrange area.

It seemed to be leaning out or running out of gas, but i actually think it was too rich low down and too lean at the top end (so i have gone up a couple of main jet sizes and it seems better up there too).

Here's what i did;

1) removed the pods i had fitted
2) set the needles back (lower) to the standard position (3rd notch)
3) refitted an original air box with standard suzuki paper/oiled foam element and oiled it (the foam outer that is).
4) replaced air box lid and its seal.

Now good.

FYI even with a K&N GS1000 specific free flow filter in the standard airbox with the lid on it wouldnt accelarate without bogging its that critical apparently.

Cheers

I wish this could be the automated sticky answer to every new member that comes on here with a bike and slaps pods and a pipe on it and then wonders why it runs like sh!t. LOL

[Don-lo]

You may need to get back close to stock mains too.

VMs are generally easier to rejet than CVs, also.

[TheCafeKid]

You may need to get back close to stock mains too.

VMs are generally easier to rejet than CVs, also.

Not quite completely true. While its a little easier to TUNE the VMs, having to change the needle position is a much bigger PITA because it requires a bench synch and then a dynamic sync every time you do it because the slides are mounted to the throttle control arm rather than simply being pushed by vaccum diaphrams.

[Jackbob]

Sweet!
Glad to see you got it sorted.

Cheers

Thanks - for the airbox, will send payment tomorrow.

[Jackbob]

You may need to get back close to stock mains too.

VMs are generally easier to rejet than CVs, also.

Yeah i will keep an eye on the plug colour - but it was far too lean on the boil previously (with an airbox not pods) so i think i am in the ballpark (VM30 carbs with 112.5 mains, '80 cylinder head, CV airbox). Carbs were originally (when i bought them) fitted with #100 main jets. Std pipes.

Thanks