Lash,
He is correct that going smaller on the countershaft sprocket puts
more
strain on the chain, but you can only go so large in the rear. The
JT
Sprockets 47 is the largest I've found. For my year, '95, the 14 is
the
smallest countershaft sprocket available.
The rule I've been told is 1 tooth in the front is equal to 3 in the
rear.
It's pretty close, but not exact. If you're doing mostly freeway,
going to
a 44 rear will increase your rpms at speed, not decrease them. You
reduce
the rear teeth or add to the front for the same effect. The stock
rear
sprocket has 43 teeth, so you'd need to go to a 40/41 tooth rear to
be the
same as going to a 16 front.
You do need to watch the power and RPM's. If you ride with a full
touring
load at speed in hilly area's, you may not like the lack of power
available
with the 16 tooth countershaft. Try it and find out. You could
always go
back to the stock CS.
You can add/remove a tooth on the front sprocket without replacing
the
chain. For me, with the 47 tooth rear and to allow the 16 front, I
had to
go to a 112 link chain. The stock 108 was way too short and a 110
put it
too close to the swingarm for riding in mud.
GregM
-----Original Message-----
From:
DSN_KLR650@yahoogroups.com [mailto:
DSN_KLR650@yahoogroups.com]
On
Behalf Of Gary LaRue
Sent: Sunday, February 24, 2008 11:46 PM
To: KLR Group
Subject: [DSN_KLR650] Sprockets - was drilling the carb slide
Hey all;
A guy once told me that if I wanted to gear my bike down a little for
going
into the really snarly stuff, it was better to buy a back sprocket
with two
or three teeth more, rather than go down one tooth on the counter
sprocket.
His reasoning made sense to me: If you go a smaller counter
sprocket, you
are bending the chain into a tighter loop there and putting the same
power
into one fewer links. Obviously, this would increase the strain and
wear.
With a larger rear sprocket that is not so.
Of course, if you want to ride the freeway to a location, then do a
quck
change along the road, it would be more practical to change the
countershaft
sprocket. *Duhh!* However, if you do most of your riding at slower
speeds,
and you stay at the lower sprocket gearing, his point makes good
sense to
me.
For me, moving in the opposite direction is indicated because I do
almost
all my riding at highway speeds, or at least very fast dirt roads.
(usually
40+ MPH.) Therefor, a higher gearing makes sense. When my original
chain
and sprockets are shot I could try to find a 44 tooth rear sprocket
which is
almost a perfect match for going up one tooth on the counter
sprocket. I
would expect that I would need a chain which is a link or two
shorter, but
maybe not. Why not go up one on the counter sprocket to get more
links into
the action instead? I may, but first I need to look at clearance
issues.
This is my first KLR and I'm not sure how much room there is down
there and
some bikes I've had over the years was a little too close for that.
If
there is plenty of room, I may very well do it that way. I suspect
it will
be fine since many of you have been doing it that way for a long
time.
Lash
----- Original Message ----
From: GMac999
To: Luc Legrain
Cc:
DSN_klr650@yahoogroups.com
Sent: Sunday, February 24, 2008 8:13:46 PM
Subject: RE: [DSN_KLR650] KLR650 : Drilling the carb slide
Luc,
I think it's the opposite. The smaller in front and larger in rear,
the
faster the engine turns for the same speed. The 14/47 is great for
off-road.
The 16/47 extremely close to the factory 15/43. I use the
15/47
as a compromise between added torque/power at lower speeds and the
capability to maintain 65 down the interstate. I don't usually try to
run
75-85 down the interstate, but if I need to, I go to the 16/47
combination.
On my '95 it's 5 screws to change the countershaft sprocket, 3 for
the cover
and 2 for the sprocket, then adjust the chain if I'm going from the
16 to
the 14. If going from the 14 to the 16, then I have to loosen it
before I
start.
GregM
-----Original Message-----
From: Luc Legrain [mailto:zrislois2klr@ yahoo.com]
Sent: Sunday, February 24, 2008 5:38 PM
To: GMac999; 'Jeff Saline'
Cc: DSN_klr650@yahoogro ups.com
Subject: RE: [DSN_KLR650] KLR650 : Drilling the carb slide
Thanks y'all for the fantastic, hands on, " been there,done that
"feed back
on the carb. Now, for some reasons the conversation switched to
sprockets..
That's good.. 'cause I'm kind of lost when it comes to teeth. On my
childhood bicycle, the smaller the sprocket in front and the bigger
in the
rear the faster you would go depending on how strong your muscles
were. On a
35-40 HP ( ?) engine what would be the "Ideal " combination?
--- GMac999 wrote:
> Jeff,
>
> I have the 14/47 combo also. You're right, it's great in the tight
> stuff.
> I'd even considered the 13/47, but couldn't locate one for the two
> bolt earlier models. I use it when it's a weekend of mostly off
road
> riding.
> When I have to run short commutes, less than 150 miles, I'll just
run
> the
> 15/47 as an all around. Longer runs, 4 -500 miles, I go to the
16/47.
>
> GregM
>
>
>
> -----Original Message-----
> From: Jeff Saline [mailto:salinej1@juno. com]
> Sent: Sunday, February 24, 2008 4:38 PM
> To: gmac999@yahoo. com
> Cc: DSN_klr650@yahoogro ups.com
> Subject: Re: [DSN_KLR650] KLR650 : Drilling the carb slide
>
> On Sun, 24 Feb 2008 08:53:48 -0800 (PST) GMac999
> writes:
> > Jeff,
> >
> > I drilled the slide out to 1/8" on my '95. What
> it took care of
> for
> > me was a slight lag at lower rpms when you twisted
> the throttle. I
>
> > can't tell any difference with the middle and
> upper rpms.
> >
> > SNIP
> >
> > GregM
> <><><><><><> <><><><>< >
> <><><><><><> <><><><>< >
>
> Greg,
>
> Thanks for another very good explanation. First it was a tire
> evaluation and now it's performance based on an internal carb
> modification.
> You're on
> a roll. : )
>
> It sure looks like you scored well with drilling the slide.
>
> I'm running a 14/46 combo in the dirt. Your 15/47 is about
mid-point
> between my 14/46 and 15/46 combos. Looks like it would be pretty
> comparable to a 14/44 combo. I know it's a significant improvement
> compared to the stock 15/43 combo. I bet you'd really like a 14/47
> combo in the dirt. It might be a bit slow in twisties.
>
> I sure appreciate your detailed and complete comments.
>
> Best,
>
> Jeff Saline
> ABC # 4412 South Dakota Airmarshal
> Airheads Beemer Club
www.airheads. org The Beautiful Black Hills of
> South Dakota
> 75 R90/6, 03 KLR650, 79 R100RT
>
>
>
>
>
>
>
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