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Main Area => General GS500 Discussion => Topic started by: mattb on October 05, 2004, 09:32:25 AM

Title: Low RPM issues????
Post by: mattb on October 05, 2004, 09:32:25 AM
Hey everyone.  New to the site and new to the bike.  Just picked up a '95 thats been in storage it's whole life from a friend of mine.  151 actual miles.  Dropped at 91 miles and sat after that until 5 days ago.  

I did a thorough cleaning on the carbs and got the machine running actually quite well over 4k rpm's.  It also idles perfectly.  The only issue I have is the low RPM range.  It seems very bogged and then all of a sudden a burst of power.  It's a little dificult to control.  Any thoughts?
Title: Low RPM issues????
Post by: tdan553527 on October 05, 2004, 09:50:40 AM
Typical for a GS, rejet, i believe that will take care of some of the low end, ignition advancer as well, or even a 15t front sprocket.
Title: Low RPM issues????
Post by: Ed_in_Az on October 05, 2004, 10:16:18 AM
Try 1 or 2 #4 brass washers available from ACE Hardware. Put them between the clip and the plastic washer on your carb needles. I used 2 on my 2000 GS and that smoothed it out. :cheers:
Title: Re: Low RPM issues????
Post by: scratch on October 05, 2004, 01:04:11 PM
Quote from: mattbI did a thorough cleaning on the carbs and got the machine running actually quite well over 4k rpm's.  It also idles perfectly.  The only issue I have is the low RPM range.  It seems very bogged and then all of a sudden a burst of power.  It's a little dificult to control.  Any thoughts?

Welcome!

Does it bog in that rpm range in the higher gears? If so, you are lugging the motor in too high a gear. The rpms are to be kept above 4000 in most gears. I only let it below 4000 in first, and no lower than 3500 in second.
Title: Low RPM issues????
Post by: mattb on October 05, 2004, 01:15:39 PM
Yes, thats correct.  It happens in the higher gears also.  Running at that high of an RPM is new to me.  I'm used to cruisers I think.  Thanks for all the input.  Should I try the washers on the needles trick, or is this normal for the bike?
Title: Low RPM issues????
Post by: Kerry on October 05, 2004, 01:40:53 PM
Good for scratch!  I totally glossed over the RPM numbers.

He's right.  If you try to roll on the throttle "under load" (not with the clutch pulled in  :roll:) at 3500 RPM or less, the engine WILL bog down.  I usually cruise between 4K and 5K RPM around town, higher on the highway.  Takeoffs from stoplights will see me at 7K or 8K (briefly).

I only go below 4K when I'm stopping or coasting or when I'm tooling along a flat neighborhood street at 25-35 mph.

I think the bike is OK for now.  Put some more miles on and see if you can't get a better feel for it.
Title: Low RPM issues????
Post by: Ed_in_Az on October 05, 2004, 02:15:50 PM
My bike was like a light switch without the washers. It turned on at 5,000rpms. There was nothing below that. With them it's a very smooth increase in both RPMs and matching power increase as the RPMs rise. If yours is on or off like mine was, I'd try it. Otherwise :dunno: