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Author Topic: Carb Jets  (Read 2013 times)
V-SIX DS#121
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Posts: 42


Western NC


« on: April 25, 2010, 11:18:20 AM »

I need a little better MPG.  Will going to smaller jets help?  Tks Rick
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R J
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Posts: 13380


DS-0009 ...... # 173

Des Moines, IA


« Reply #1 on: April 25, 2010, 11:57:20 AM »

If the bike is stock, you are as lean as you dare get.......

Most of us did not buy this bike for it's known gas mileage.

To get better mileage, DO NOT DO ANY OF THESE:

1. Twisting of the throttle rapidly and for long periods of time.
2.  Stay under 56 MPH
3.  Jack rabbit starts from a stop.
4.  Don't hit the brakes before 40 ft from where ya need to stop.

That should help ya a lot, but it ain't no fun doin it.......

Hate to say it, but if you want gas mileage, sell the Valk and buy an ST1000.
« Last Edit: April 25, 2010, 11:59:28 AM by R J » Logged

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John U.
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Posts: 1085


Southern Delaware


« Reply #2 on: April 25, 2010, 02:18:48 PM »

I ride down hill as often as possible  cooldude
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98valk
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Posts: 13497


South Jersey


« Reply #3 on: April 25, 2010, 05:16:01 PM »

I need a little better MPG.  Will going to smaller jets help?  Tks Rick

u don't mention any mods to the bike, mpg getting now and at what speed the poor mpg is at.

suggest factorypro.com  read their constant velocity carb tunning guide. there are things u can do to get better mpg. it running higher hwy speeds, u need to make sure your not into the needle circuit of the carb, u want to be into only the pilot jet circuit, which means sometimes only going to a one size larger pj will do the trick.
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C  10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp

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Robert
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Posts: 17022


S Florida


« Reply #4 on: April 25, 2010, 05:29:42 PM »

Dont lean it out its already there advance the timing.
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“Some people see things that are and ask, Why? Some people dream of things that never were and ask, Why not? Some people have to go to work and don’t have time for all that.”
SgtBunny
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Posts: 427


"Don't be a Lemming!" - MCC

Kingwood, WV


« Reply #5 on: April 25, 2010, 07:30:41 PM »

As far as gas mileage, I have been wanting more mpg out of mine and found the following.

Mods made:
Dyna3000 installed
Cobra 6x6
Cobra needle kit

Gas mileage:

avg 65-70mph = 34 mpg
avg 75-80mph = 25 mpg

after racing Big Dog chopper = tank avg was 20mpg ...hmmmmm  Cheesy
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VRCC #29625
'98 Tourer

dago mooserider
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Posts: 174


San Diego, CA


« Reply #6 on: April 27, 2010, 08:20:15 PM »

I can only suggest slowing down. my valk has gotten 40+ mpg a couple times when I stayed  65 mph and under. At 75-80 it quickly goes in the toilet. I'm all stock except a k&n.
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98 valk, 2000 valk, 04 gsxr 750, 85 atc250r, 88 trx250r, 97 expedition (it's indestructible!), 12 civic si, 16 acura tlx, 18 f150.
John U.
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Posts: 1085


Southern Delaware


« Reply #7 on: April 27, 2010, 08:35:43 PM »

As Robert said, advancing the timing will help, as long as your right wrist isn't to exuberant. A 4 or 6 degree trigger wheel (no more than the 4 for an I/S) or the inexpensive ECT mod will help. The ECT mod gained me 2 or 3 MPG if I keep the rpm's below 3,000.
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Ricky-D
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Posts: 5031


South Carolina midlands


« Reply #8 on: April 28, 2010, 06:33:50 AM »

I need a little better MPG.  Will going to smaller jets help?  Tks Rick

Only if they have been changed to larger idle jets and/or larger main jets and/or the needle jets have been messed with.

Best is stock!

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2000_Valkyrie_Interstate
timk519
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Posts: 44

South-Central Ontario, Canada


« Reply #9 on: May 01, 2010, 06:02:08 PM »

The Dial A Jet by Thunder product's will get you a few more HP and MPG. They also allow you to adjust your jetting to altitude which makes a big difference in MPG.
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stude31
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Posts: 1100


Topeka,ks


« Reply #10 on: May 04, 2010, 02:22:22 PM »

Oh and don't ride south to texas with a 30mph head wind.  Tank gets empty rather quickly riding at 75mph.  Try 22mpg   Undecided   But it sure was fun !!!   crazy2
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Ricky-D
Member
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Posts: 5031


South Carolina midlands


« Reply #11 on: May 05, 2010, 06:45:44 AM »

The only modification I have made to my Valkyrie is a 6 degree trigger wheel.

My miles per gallon increased by about two miles per gallon with the trigger wheel.

I get a steady 40 miles to the gallon around town, get up to 42 and 43 miles per gallon on the interstate as long as I keep the speed under 70 miles per hour.

I use premium gasoline and have over a hundred thousand miles on the bike.

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2000_Valkyrie_Interstate
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