>
>xperience - yes; wisdom- ???, opinions- yes. Boring out the carb would be
>one of the last things I would do. The venturi is where the low pressure
>area is created and the fuel is draw up through the jet circuit to be
>atomized. More area = equal lower velocity = poor atomization = burppp,
>gurggle, sputter, your low and mid range throttle response will likely suffer
>(JMHO). I use to race small bore 2-strokes where throttle was pinned all the
>time and rowed the gear box up and down to change speed. Yes, our bored out
>carbs *seemed* to make more top end power but at the sacrifice of everything
>else. I'm sure you could put 'er on a dyno with the bored out carb and tune
>for more peak power, but I wonder how many humps and bumps there would be at
>the *normal* throttle settings - where you spend most of your time.
>
>But more importantly, I think you should carefully consider *change
>analysis*. Seems to me you have changed soooooo many things on your bike
>that it has the potential to be a tuner's nightmare! That said, if you do
>the pipe and jets, you can piddle around and get it like you want it - all it
>takes is time and determination. But once you bore that carb out, it aint so
>easy putting the metal back in if it don't run like you had envisioned.
>
>Knot
>
>ps: Like your seat mods, send pics - pleeeezzz
Knot,
Your insight is uncanny. I was browsing the archives before my post and
much information is to be had there about our wonderful carbs. But I
didn't gather enough info about modifying our stock carbs. I reflected on
my post as soon as I received it and realized that the pressure
differential wouldn't be enough, however, at this altitude I figured that
less fuel and more air would be better and that carefully selected jets and
needle position would compensate. I digress... sudden flow differences
would cause the hiccups that you mentioned and I would have a very
difficult time tuning those out.
I am not in the least bit worried about my mixed soup of mods, an
orthogonal matrix of variable selection/reduction with all the variables
present will almost always present the optimum solution. Take out a
variable and you'll end up have to re-do the matrix and start almost at
ground zero. After starting with a new variable each time the total time
spent is much more if you go one at a time... However, you need a cool head
a good understanding of what changes do what.... G knot you should come
visit for a week or so.
I think I'll check some salvage yards for a larger CV with the required
sizes already engineered in. Then I'll get rid of my air-box and make a
real screamer. OOps getting ahead of myself again.... See how easily
excited I get?
Perhaps this winter will only involve a port and polish and a shaving of
the head to raise the compression a smidge. Anybody do that yet on the KLR?
Thanks a bunch Knot.... I'm still striving to make the Pikes Peak event and
if I add any more stuff to my plate I'll be lucky to get to it next year.
LaterZ
Dash
Pics are on the way. Daryl went riding all day today and said that my new
saddle may not make it to my bike....
But I'll just make it better
next time...... Luckily it is the wrong color for his bike.
I
did Skip's tank mod at the same time.
Sorry about the lack of pictures on the project. I've missed my 4th
Deadline but I did get a whole bunch of stuff done recently, I've been
working frantically and didn't stop for photos.
Soon to be complete. Waiting on my new s-bend, as it is ready to fire
up. Installed all the relays and new wiring for the 210 watts of
illumination up front. Man those are bright, I'm still seeing spots. Also
did the new running lights and blinkers. I have found that the stock
flasher won't flash my new Lockhart Phillips' Stubbies, off to AutoZone for
lunch. Installed a brake light modulator, very nice.
More to come....
LaterZ
Dash