only getting 45mpg on 2001 svs?
kc at brgracing.com
Wed Jul 23 19:56:27 PDT 2008
Why is it when people start talking about fuel mileage it always goes to gee
you have to pull fuel out run it lean..... No that a hole lot of BS....
Ooops did I use my out side voice. Sorry guys gals. We do a lot of tune for
power and for fuel mileage. Time and time again when we have the fuel ratios
right we get both good power and when the customer can keep his hand / foot
out of the throttle get good fuel mileage. You can get just as crappy fuel
mileage with a motor that is running lean as you can with it running rich.
If the motor is going to make good power. Then in most case it will get good
fuel mileage. And the defiance is in the cam timing. We did not have some
much trouble back in the day when the cams where bolted on but with this dam
press on gear the cams are all over the place.
BRG Racing Products
"We Have Sickness For Quickness"
KC at brgracing.com
From: Randy Grein [mailto:randygrein at comcast.net]
Sent: Tuesday, July 22, 2008 9:42 PM
To: Suzuki SV650 Mailing List
Subject: Re: only getting 45mpg on 2001 svs?
Jetting on my street bike is stock - no changes at all. And I just
checked, with the fairing and hard bags I'm getting 55 mpg freeway,
averaging just over 70 mph. I did drop a tooth off the rear sprocket
which seems to have helped - makes me wonder what going to a 16/45
setup would do.
Randy Grein, WMRRA #41
On Jul 22, 2008, at 12:47 PM, Jo Rhett wrote:
> I take it from your numbers that before you started jetting it was
> very lean? And that the only way to get those 50-55mpg numbers is
> to lean it out, perhaps too much?
> On Jul 18, 2008, at 12:31 PM, Mike Carter, Jr. wrote:
>> Stock jetting, I would get 50~55 mpg frequently on my 2000 naked.
>> This was normal 55mph~60mph riding on back country roads. Highway,
>> it would drop down to around 48mpg.
>> Then I rejetted when I added my dual Renegades (152.5 mains, hogged
>> out stock air filter, 17.5 pilots, drilled slide hole, 2.5 turns on
>> the A/F screw, dynojet needle on the third clip) and it was dyno
>> tuned to have the perfect A/F ratio throughout the rev range. I
>> was getting 45 mpg EVERYWHERE. No matter, if I rode two up, one up
>> loaded for touring, track days, spirited street, highway...any
>> combo... I always got 45mpg in return.
>> When I did the 03 intake cam swap, it jumped up to 48mpg everywhere
>> with no changes...but my jetting was off (according to the dyno).
>> I had to up to 160F/162.5R mains. And as expected, my mileage
>> decreased to around 44mpg.
>> Now I have a set of 41mm Kehien FCR's... I really don't care about
>> mileage...it's just too much fun to ride now.
>> What I am trying to get at here is...if you have any type of
>> jetting change, open exhaust, etc... you will get right around
>> 45mpg. I've seen it on my bike and few other first gen SV's I ride
>> with as well. If I was to jet for mileage (and rideability
>> second), I would go with the stock setup (oe filter with the
>> snorkle in it, 137.5 mains, 15 pilots at 2.5 turns and stock needle
>> with no shim under it). But to get a compromise (I have rejetted a
>> few friends to this and they love it). Stock air filter (snorkle
>> still intact), 140 Mikuni mains, 15 pilot, 3 turns on A/F, drilled
>> slide hole, 1 shim under the needle and stock exhaust. Runs much
>> better and the throttle response is VERY good.
>> And who said jetting isn't fun?
>> ----- Original Message ----
>> From: Jo Rhett <jorhett at fastlizardracing.com>
>> To: Suzuki SV650 Mailing List <sv650 at micapeak.com>
>> Sent: Friday, July 18, 2008 2:41:07 PM
>> Subject: only getting 45mpg on 2001 svs?
>> I figured my gas mileage was a bit low, but after measuring for a
>> month or so it's pretty dead average 45mpg. I swear I used to get
>> 52mpg on my 2002 before I turned it into a racebike.
>> This could all be in the throttle hand, obviously. But 7mpg seems a
>> bit much for just that.
>> Besides cleaning the air filter, anything else I should check?
>> Jo Rhett / velociRaptor Racing
>> #553 WERA / AFM
> Jo Rhett / velociRaptor Racing
> #553 WERA / AFM
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