GL1200: High RPM when hot / or clogged (?)
I'm hoping someone has some experience, or can tell me what they think is going on with my bike.
I have an 84 GL1200 Aspy. A couple of times I've experienced this condition, then it seemed to clear up by itself.
The 'condition' is that after some time at sustained speed / RPM's (like 70 and 3,400). Then I'll get into town where I'll just be at more like 15-25 MPH and 2,200 RPM (approx)... The bike will be stuck revving at 3,000 or higher! Even at idle the RPM's won't come down. The latest occurrence (yesterday)... this happened, but it seemed ALSO to be influenced by the engine temperature... The bike was running very hot after a lot of slow twisties on a hot day and getting stuck in a bit of stop-n-go traffic. When the bike got hotter, the idle RPM got to about 4,000.
I managed to get home safely and park the bike.. by this time the bike would idle at 'only' 2,400 RPM... which I saw as an improvement. Later, I started the bike up... and thankfully it was idling normally (about 1,000 rpm)... But, I didn't do anything to fix it. Which is why I think the temp had an influence.
I suspect the issue is something to do with the fuel system... maybe a chunk of debris is blocking or holding something in the wrong place... But, could it be an electrical thing?
I know it wasn't the throttle cable or linkage... I was able to see and feel that all that was moving normally.
I know it wasn't the choke cable or linkage... I could see those components working normally as well.
I did rebuild the carbs recently, and USUALLY the bike runs very well and reliably.
There IS some debris in my gas tank still (rust granules) and I do clean my bronze fuel filter every few gallons. (which is why I suspect something is getting lodged in the carb causing the revving).
This type of thing has happened before, and I attributed it to debris in the carb. And it seemed to clear itself... But, this is the first time engine temperature seemed to play a role.
So... does anybody have any idea of what could be happening with my bike?
Craig - Novato, CA