Page 1 of 1
rpm's surging when up shifting / like power shifting
Posted: Mon Aug 11, 2008 5:55 pm
by into112003
I have a 2003 klr 650 with 13,000 miles, a stage 1 Dynojet kit
installed,no airbox mod, clean stock air filter. Bike ran great with
this setup for last 2 yrs.Now bike starts easily, idles ok and pulls
good up through the gears but when I pull in the clutch while closing
the throttle to shift the rpm's continue to increase or surge up for
a second then drop after I close the throttle. Checked that carb is
getting plenty of gas from tank , choke is all the way off, throttle
cables are adjusted correctly and are not binding. Carb butterfly
always closes when throttle is released. I disasembled carb, cleaned
everything and inspected both diaphragm's slide and air cut off and
both seem to be in good condition and all jets are clean. Tested
slide with vacume cleaner for suction and it opend and closed
correctly when moving the throttle linkage. Youtube has some good
video's on the KLR,cvk 40 carb or cv carbs and how they work mostly
by Harley owners that use a keihin cv carb that was
helpful.Reinstalled carb and no change. I also reduced idle as low as
possible, ran it through the gears without the air filter to lean it
out but still surging. Tried spraying starting fluid around carb area
and exhast when bike was ideling cold for vacume leak but had no
effect.
Any ideas???
rpm's surging when up shifting / like power shifting
Posted: Mon Aug 11, 2008 7:04 pm
by Tumu Rock
--- In
DSN_KLR650@yahoogroups.com, "into112003" wrote:
>
> SNIP>>
bike starts easily, idles ok and pulls
> good up through the gears but when I pull in the clutch while
closing the throttle to shift the rpm's continue to increase or surge
up for a second then drop after I close the throttle.
> Any ideas???
>
Is the engine actually revving faster or is the tach showing that the
revs are increasing? If it's just the tach, could be a
regulator/rectifier issue. If it's the engine revving, could be that
the clutch is slipping a little under heavy load or it could be a
timing issue between the left and right hands...
da Vermonster
rpm's surging when up shifting / like power shifting
Posted: Mon Aug 11, 2008 10:33 pm
by Michael Martin
You might be on to something looking for a vacuum leak. How's the line to the petcock and the petcock itself?
Mike Martin,
Louisville, KY
----- Original Message ----
From: into112003
Tried spraying starting fluid around carb area
and exhast when bike was ideling cold for vacume leak but had no
effect.
Any ideas???
_
[Non-text portions of this message have been removed]
cam timing
Posted: Tue Aug 12, 2008 4:35 pm
by Wayne Blackburn
Has anyone tried changing the cam timing for better performance?
I spoke with a friend of mine about installing the 705 kit.
His answer was, Why not just ajust the timing.
This friend use to own a mc dealership and is someone
who knows his stuff about engines.
My thought was since it's time to check the valves.
maybe I could tweek the cam timing a bit.
My other question is,How much does the valve adjustment
effect the performance.
The reason I ask is, The old girl seems to have lost a bit
of her power.
Any ideals are welcome
Wayne
07 red [ the fast ones ]