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Overheat the engine???

Started by dougwo, April 06, 2010, 01:39:09 AM

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dougwo

Well, I went on a 120miles back road trip with my buddies who ride a GSX-R1000 and Buell Firebolt. As you can imagine, I needed to beat the crap out of my GS to keep up. (They were doing 60mph on 25mph turns, and 85 on 40mph turns). BTW, my knees were sooo close to drag but I just have a pair of jeans!
As we got to our destination 60miles out, the idle just hung at 3k and did not come down unless I ease the clutch out.
HOWEVER, it does not happen prior this trip... And FYI, I just got my carb cleaned about 80mi prior to this trip.
It seems like it only happens after I do a lot of hard acceleration. and doesn't happen on a easy commute ride.

Any suggestion? Did I fudge something up?
Thanks!

gsf500RR

So you could keep up with the GIX 1000? Lol a the noob skill of the pilot riding it  :o

burnymcstalls

the 3k hang is something I have with my bike. I believe its a vac leak somewhere

dougwo

Quote from: gsf500RR on April 06, 2010, 04:26:07 AM
So you could keep up with the GIX 1000? Lol a the noob skill of the pilot riding it  :o
LOL! well, the route had lots of twisties and that's how I kept up with them. They are not aggressive by any mean when they are corning. They just like to ride "fast" (on straight stretch)
What are the usual suspects for vacuum leaks by the way??

burnymcstalls

usual suspects for vac leak would be a high idle, or an idle that isn't steady. Usually you can do the soapy water/ether trick. Spray some starting fluid around your carbs, but not into them. What you're looking for is the idle to go up due to the fact that a vac leak is pulling in the ether, and you'll know that you either have a bad seal somewhere, or maybe something like a hose with a crack in it.

I mention soapy water, because that works great for things that are leaking vac negatively, and blowing air out. A tire is a good example. put soapy water on a tire and see if bubbles form, and you know you have a leak. There might be other ways to go about it, but I'm fairly certain my issues were due to oversized fuel lines that wouldn't crimp with hose clamps, or I had a some type of gunky issue with my carbs

burnymcstalls

you also might want to check your oil level, and make sure its not too low or too high, as some other members have had "overheat" symptons, when its just been an oil problem

Allen

It sounds normal to me, it only happens after driving it hard, you can adjust your idle down a little bit til it drops back to 1500 and go from there; it will only idle a little lower when its not warmed up. But play with it and adjust it to 1500 when its hot and starts to hang like that.  Hope that works for you.

gregvhen

My bike will idle high too after running high rpms. it goes away when the engine eventually cools back to normal temperature. to cool it off quicker ride in 6th but only do about 40. this way your at really low rpms, but moving fast enough to cool the engine quicker.  I also use this for a cool down ride before I park the bike for the day.

lamahug

My 2004 GS500F also idles high at 3000RPM.  It does it intermittently, and is annoying!  But I am used to it now and don't have the courage to tackle the carbs.  I guess you have to take the gas tank off, and so forth.  I even have the service manual...  I am such a wimp for not fixing this.  :icon_rolleyes:

But I love my GS!  YEAH!  Everyone, give your GS a big hug.... :D




DoD#i

#9
The trip described should have no overheating issues, unless you have a fairing full of mouse-nest - riding fast on the open road, plenty of airflow over the motor. Overheating is much more likely when idling in gridlock (no airflow.) So I'd say any temperature effect is that of simply being properly warmed up to full operating temperature. That may not be happening on your easy commute, depending on the commute.
1990 GS500EL - with moderately-ugly paintjob.
1982 XJ650LJ -  off the road for slow repairs
AGATT - All Gear All The Time
"Ride a motorcycle.  Save Gas, Oil, Rubber, Steel, Aluminum, Parking Spaces, The Environment, and Money.  Plus, you get to wear all the leather you want!"
(from DoD#296)

dougwo

Sorry I haven't checked my post sooner... Thank you all for the help. High idle adjustment would make perfect sense because I was always wondering why my bike idle right on 1500RPM at start up on a 65 degrees day...  :icon_rolleyes:

gregvhen

Quote from: lamahug on April 20, 2010, 04:55:51 PM
My 2004 GS500F also idles high at 3000RPM.  It does it intermittently, and is annoying!  But I am used to it now and don't have the courage to tackle the carbs.  I guess you have to take the gas tank off, and so forth.  I even have the service manual...  I am such a wimp for not fixing this.  :icon_rolleyes:

But I love my GS!  YEAH!  Everyone, give your GS a big hug.... :D





I dont mean to be rude, but are you ghey?

burnymcstalls

Quote from: gregvhen on April 21, 2010, 08:37:50 AM
Quote from: lamahug on April 20, 2010, 04:55:51 PM
My 2004 GS500F also idles high at 3000RPM.  It does it intermittently, and is annoying!  But I am used to it now and don't have the courage to tackle the carbs.  I guess you have to take the gas tank off, and so forth.  I even have the service manual...  I am such a wimp for not fixing this.  :icon_rolleyes:

But I love my GS!  YEAH!  Everyone, give your GS a big hug.... :D





I dont mean to be rude, but are you ghey?

that is an irrelevant question. Pull your tank, dont look back

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