Won't rev past 6,500

[Doug VK]

Hi, I've got a completely stock 1979 GS1000L with 7,500 miles. New Suzuki air cleaner. The bike runs excellent, very powerful. But, let's say I full throttle it from 3,000- it starts pulling stronger and stronger until it hits between 6,500 and 7,000, than it falls flat, doesn't pull any more and doesn't
rev anymore. Bikecliff in the welcome blog says that one should install electronic ignition if you have a 1979 model. Do you think that the points are floating? They are the original points that have been gaped correctly.

[Rob S.]

Does the new Suzuki air cleaner coincide with the problem?

Did it ever, in your ownership, rev past 6500?

[Doug VK]

Does the new Suzuki air cleaner coincide with the problem?

Did it ever, in your ownership, rev past 6500?

I bought the bike and never road it before new parts were installed, ie. air cleaner.

[Rijko]

Bikecliff in the welcome blog says that one should install electronic ignition if you have a 1979 model. Do you think that the points are floating? They are the original points that have been gaped correctly.

No need to ditch the points, if set correctly the GS will run perfect with them.

[Rob S.]

I bought the bike and never road it before new parts were installed, ie. air cleaner.

I never buy a bike I haven't red lined.

[Rijko]

Can you rev the bike higher than 6500 standing still ?

[Rust_to_Redemption]

Perhaps the mechanical advancer is not working properly? I had a similar problem on a different bike which turned out to be a sticky mechanical advancer. After I gave them a proper cleaning and lubing and re-installed, the bike rev'ed perfectly through the whole range. Could be something to check on.

[Doug VK]

Can you rev the bike higher than 6500 standing still ?

yes, it doesn't seem to have a limit free revving it.

[Doug VK]

I think looking into the advance is a good idea.

[Rijko]

I think looking into the advance is a good idea.

it is.

Carb float level may also be an issue.

Have you done any other work on the bike like valve clearance check,
cleaning the carbs, or changing o-rings on the carb boots ?