As you can tell by the many post I have made this evening I have a lot of down time at work. Well here goes another one.

On my daily commute (100 miles round trip) my bike runs just fine on the freeway. At the start of my trip I have to go through about 4 traffic lights to get to the freeway and the bike acts like normal. At the end of my trip I hvae to go through the gate of a military base, and two more traffic lights to get to where I work. This time at stop lights my bike wants to idel at 4000 RPM's and I hve to feather the clutch to keep them down.


any help is appreciated.

 

There could be a few things wrong. The routing of the throttle cable can be making the throttle stick but it would return better if the bars are turned.


A vacuum leak will ramp the rpm's up.


If and when you feather the clutch, does the idle settle down until you open the throttle a bit and then it ramps up again? If so the carbs may need to be sync'ed.

 

when I feather the throttle while holding the brake at a stop light it calms down. If I pull in the clutch the rpms go up. The weird part is this never happens at the beginning of a ride. Only at the end.

 

There may be a slide that is sticking.

 

When you say there may be a slide sticking, what is that?

 

Part No18 in the fiche:-

1991 Honda CBR1000F AC CARBURETOR (COMPONENTS) | MRCycles

 

Let's throw this at the techs.

Could be choke/enricher problems?

Bound up cable or sticky enricher lever on the carb end.

Like the bike's fully warmed up but enricher is stuck open causing excessive revs

 

orings, on the pilot jet needles - check them - might be air getting past

also make sure the all carb top caps are seated and sealing properly
and no microscopic holes or rip in the diaphragms, hold up against a bright light.

Lastly make sure the carb rubbers to the motor are tight and not
cracked or leaking
Bench sync them then put on the bike and properly sync with a meter making sure
idle is dialed in at it lowest sustainable setting from the get go

 

Today before work, I grabbed some carb cleaner and hosed the throttle linkage really good. then I fired up the motor and as per the directions on the can I shot some carb cleaner into the air box while the engine was running. The last thing I did was after the motor was warm enough to idle way out of spec (4K rps) I simpley turned down the idler screw until the rpms were so low the engine almost choked itself off. After that, I dialed up to the factory spec according to the manual. So far I noticed a night and day difference in how my bike acts around town after it warms up. So far so good. Fingers Crossed.

I'm still going to get a good carb sincronizer tool, and give the carbs a proper going over ( I found one for about $135.00) Just to be safe. considering I have found so much stuff the previous owner did that was not per the manual instructions, its the safe thing to do.

 

A sync will do you good. It's actually fairly easy to do on the 1000, the vacuum ports are atop the carbs. My 600 is a gong show compared to its big brother.