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is it hot in here or am i just running lean?
Posted: Sat Aug 04, 2007 9:30 pm
by boulder_adventure_rider
Summary: '05 with 13k+ miles (seen action). Recently overhauled top
end upping one size on the piston. Concerns: seems to be knocking
more than it did at idle, possibly running a bit hotter and I'm
getting more backfiring when decelerating.
Details:
I've got a 2005 vintage with 13,000+ miles and recently I had the top
end reworked to the next size up. I've done the 500 mile break-in
and under load it runs like a champ. However at idle it seems to
knock a bit more than I remember. In fact, today I couldn't keep it
idling properly, so I thoroughly cleaned the carb, put in a fresh Uni
air filter and fixed a kink in the "T" mod for the carb.
Now, my neighbor has a 2007 that I've compare the sound to and it
does knock here and there compared to his showroom condition. Then
again I'm running closer to 1,100 rpm and he's closer to 1,300. This
explains some of the difference. But mine also seems to run a bit
hotter than it used to. Now this could be my paranoia, but my temp
gauge goes over the middle mark when idling on a not so hot day.
Lastly, I notice a bit more backfiring when I rev the engine or
decelerate quickly after speeding. I've check the exhaust for leak
and all seems tight.
Do you think after the overhaul (top end) maybe I'm running a bit
lean with a slightly larger piston/cylinder? I checked the sparky
and it looks normal. The main jet seems fine because it has full
strength under load. So perhaps the pilot jet is too lean? Any
thoughts or remedies I should try? Normally I've done my riding
around sea level, but now I'm living in Colorado I'm thinking maybe
the altitude and the overhaul necessitate a carb/rejet change.
Thanks - Brian
is it hot in here or am i just running lean?
Posted: Sun Aug 05, 2007 6:17 am
by Terry Hamrick
What sort of break-in did you give that new top-end?
albatross
wondering, wandering...
On 8/4/07, boulder_adventure_rider
wrote:
>
> Summary: '05 with 13k+ miles (seen action). Recently overhauled top
> end upping one size on the piston. Concerns: seems to be knocking
> more than it did at idle, possibly running a bit hotter and I'm
> getting more backfiring when decelerating.
>
> Details:
> I've got a 2005 vintage with 13,000+ miles and recently I had the top
> end reworked to the next size up. I've done the 500 mile break-in
> and under load it runs like a champ. However at idle it seems to
> knock a bit more than I remember. In fact, today I couldn't keep it
> idling properly, so I thoroughly cleaned the carb, put in a fresh Uni
> air filter and fixed a kink in the "T" mod for the carb.
>
> Now, my neighbor has a 2007 that I've compare the sound to and it
> does knock here and there compared to his showroom condition. Then
> again I'm running closer to 1,100 rpm and he's closer to 1,300. This
> explains some of the difference. But mine also seems to run a bit
> hotter than it used to. Now this could be my paranoia, but my temp
> gauge goes over the middle mark when idling on a not so hot day.
> Lastly, I notice a bit more backfiring when I rev the engine or
> decelerate quickly after speeding. I've check the exhaust for leak
> and all seems tight.
>
> Do you think after the overhaul (top end) maybe I'm running a bit
> lean with a slightly larger piston/cylinder? I checked the sparky
> and it looks normal. The main jet seems fine because it has full
> strength under load. So perhaps the pilot jet is too lean? Any
> thoughts or remedies I should try? Normally I've done my riding
> around sea level, but now I'm living in Colorado I'm thinking maybe
> the altitude and the overhaul necessitate a carb/rejet change.
> Thanks - Brian
>
>
>
[Non-text portions of this message have been removed]
is it hot in here or am i just running lean?
Posted: Sun Aug 05, 2007 8:25 am
by boulder_adventure_rider
first 500 miles under 4k rpm and varying throttle. now working on
the next 500 miles under 5k rpm. i'll probably check valve
clearances at 1,000 mile mark.
--- In
DSN_KLR650@yahoogroups.com, "Terry Hamrick"
wrote:
>
> What sort of break-in did you give that new top-end?
>
> albatross
> wondering, wandering...
>
> On 8/4/07, boulder_adventure_rider
> wrote:
> >
> > Summary: '05 with 13k+ miles (seen action). Recently overhauled
top
> > end upping one size on the piston. Concerns: seems to be knocking
> > more than it did at idle, possibly running a bit hotter and I'm
> > getting more backfiring when decelerating.
> >
> > Details:
> > I've got a 2005 vintage with 13,000+ miles and recently I had the
top
> > end reworked to the next size up. I've done the 500 mile break-in
> > and under load it runs like a champ. However at idle it seems to
> > knock a bit more than I remember. In fact, today I couldn't keep
it
> > idling properly, so I thoroughly cleaned the carb, put in a fresh
Uni
> > air filter and fixed a kink in the "T" mod for the carb.
> >
> > Now, my neighbor has a 2007 that I've compare the sound to and it
> > does knock here and there compared to his showroom condition. Then
> > again I'm running closer to 1,100 rpm and he's closer to 1,300.
This
> > explains some of the difference. But mine also seems to run a bit
> > hotter than it used to. Now this could be my paranoia, but my temp
> > gauge goes over the middle mark when idling on a not so hot day.
> > Lastly, I notice a bit more backfiring when I rev the engine or
> > decelerate quickly after speeding. I've check the exhaust for leak
> > and all seems tight.
> >
> > Do you think after the overhaul (top end) maybe I'm running a bit
> > lean with a slightly larger piston/cylinder? I checked the sparky
> > and it looks normal. The main jet seems fine because it has full
> > strength under load. So perhaps the pilot jet is too lean? Any
> > thoughts or remedies I should try? Normally I've done my riding
> > around sea level, but now I'm living in Colorado I'm thinking
maybe
> > the altitude and the overhaul necessitate a carb/rejet change.
> > Thanks - Brian
> >
> >
> >
>
>
> [Non-text portions of this message have been removed]
>
is it hot in here or am i just running lean?
Posted: Sun Aug 05, 2007 11:05 am
by Norm Keller
How many miles on your rebore? It is amazing how much more friction is created by new rings, piston, and rebored cylinder for the first while.
The slight increase in displacement can be ignored so far as jetting, etc. is concerned.
As for the noise, it might be piston slap if the machine shop weren't attentive to the specifications. Many shops will bore all motorcycle cylinders as though they were air cooled and often increase the clearance a bit over that needed for air cooled engines. They do this to reduce the chances of a piston seizure during break-in and hard use. This way they are less likely to be on the hook for a problem. The downside is that the rebore doesn't last as long and there is more piston slap.
HIH
Norm
[Non-text portions of this message have been removed]
f/s oem seat
Posted: Mon Aug 06, 2007 10:52 pm
by Don
I have an oem seat from a 2002
I went with a Corbin flat right away and this seat has been in the box
for sometime. have been cleaning out the garage and thought maybe
someone out there needs a good seat.
sell for 50 plus shipping
no rips like new condition