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Rough Take Offs

Started by gsatterw, June 20, 2013, 07:52:30 PM

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gsatterw

This may have been covered before, but I can't find any threads on it.

When I take off, my bike seems to have a rough time. When its in neutral, the bike will rev very nicely, but whenever I take off, I get some spitting and hesitation in acceleration. Happens both cold and warm. The effect is really present on take off, and less so while shifting through the gears. Seems to be a 5.5k and lower issue. The damn bike roars after that (while my gas mileage suffers). My jetting should be below in my signature.

Valves clearances are in good shape. Oil is good. Battery is good. I'm thinking maybe I need to clean out my jets or something?

Thoughts and ideas are greatly appreciated.

Thanks,
Graham  :bowdown:
2002 GS500
Progressive Springs|15w oil|Heavy Duty Fork Brace|R6 Rear Shock|Cbr900rr Rear Sets|Reverse Shifting|'89 Factory Clipons|R6 Throttle Tube|K&N Lunchbox|V&H Exhaust|Jets: 22.5/65/147.5|3 turns|Shorai Li/Fe Battery|Iridium Plugs|Blue SS brake line|Blue Levers|Blue Chain

Leadberry

Are you positive that it's an engine issue?  I've had similar symptoms from a loose chain.

sledge


gsJack

My 02 has taken off smoothly and run smoothly at any rpm for 98.6k miles but I've never messed with the carbs.   :dunno_black:  Do most of my running below 6k rpm now.  Thought it's 3 circuit carbs were a big improvement over the 2 circuit ones I had on the 97 GS.
407,400 miles in 30 years for 13,580 miles/year average.  Started riding 7/21/84 and hung up helmet 8/31/14.

gsatterw

I was just providing engine details to rule out the idea that it may be engine trouble.

Its highly possible the carbs are out of sync.

And I rejetted out of necessity. The guy before me (or who knows how many guys before me) put a v&h exhaust on and a k&n drop in filter and rejetted the to 22.5/60/127.5, so the low end was alright, mid-throttle was a bit lean and the higher throttle positions was outrageously lean.

Graham
2002 GS500
Progressive Springs|15w oil|Heavy Duty Fork Brace|R6 Rear Shock|Cbr900rr Rear Sets|Reverse Shifting|'89 Factory Clipons|R6 Throttle Tube|K&N Lunchbox|V&H Exhaust|Jets: 22.5/65/147.5|3 turns|Shorai Li/Fe Battery|Iridium Plugs|Blue SS brake line|Blue Levers|Blue Chain

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