Go Back   EcoModder Forum > EcoModding > Motorcycles / Scooters
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 08-04-2012, 12:02 PM   #1 (permalink)
EcoModding Lurker
 
greenjoe's Avatar
 
Join Date: Dec 2010
Location: Tennessee
Posts: 46
Thanks: 8
Thanked 8 Times in 5 Posts
Lets try a Hyosung GT250

Picked up a GT250 last weekend, 250cc v-twin, air cooled w/oil cooler. The bike has just over 5k miles and been wrecked twice, got it and some extra parts for $500. Just rode 153 interstate miles for a rough base, 72.9 mpg @ 65 -70 mph(gps). I will start this weekend with gearing changes and try to retro-fit the bodywork from the earlier 125cc Ninja project.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 08-04-2012, 05:16 PM   #2 (permalink)
Master EcoModder
 
Join Date: Feb 2009
Location: France - Paris
Posts: 762

la_voiture_de_courses - '03 Renault Megane Estate
OldContinents
90 day: 44.34 mpg (US)

xiao lan - '01 Audi A2
90 day: 38.88 mpg (US)

Brit iron - '92 Mini Mini
90 day: 45.5 mpg (US)

Prius - '09 Toyota PRIUS Lounge
90 day: 47.37 mpg (US)

Beemer - '06 BMW F800 ST
90 day: 53.06 mpg (US)
Thanks: 188
Thanked 33 Times in 30 Posts
Sounds good.

Let's hope the sprockets are current sizes ...
  Reply With Quote
Old 08-05-2012, 09:59 PM   #3 (permalink)
Master EcoModder
 
low&slow's Avatar
 
Join Date: Feb 2009
Location: Livermore CA
Posts: 341

l&s' Jag - '00 Jaguar S-Type SE
90 day: 25.86 mpg (US)

l&s' Vision - '82 Yamaha Vision XZ550RJ
90 day: 59.92 mpg (US)

L&S' Greenaero Ninja 250 - '99 Kawasaki Ninja EX250F Ninja 250R
90 day: 97.24 mpg (US)

SilverAero Ninja 250 - '04 Kawasaki EX250 Ninja
90 day: 88.24 mpg (US)
Thanks: 46
Thanked 176 Times in 91 Posts
Greenjoe, Great! Sounds like it has lots of potential. Please Keep us posted with your progress.
all the best, Vic
  Reply With Quote
Old 08-06-2012, 08:55 PM   #4 (permalink)
EcoModding Lurker
 
greenjoe's Avatar
 
Join Date: Dec 2010
Location: Tennessee
Posts: 46
Thanks: 8
Thanked 8 Times in 5 Posts
Changed the the gearing from 15/46 to 15/38 with a modified yfz450 sprocket & dropped the cruising rpm from 7900 @ 70mph(gps) to 6600 @ same speed. Also lowered the bike 1 inch in the front & 1 1/4 in the rear, stiffened the shock, changed handlebars, and a few other minor mods. Trying to put on a few miles to see a change in fe from the gearing. This thing really need some aero mods, I feel like a parachute riding it.
  Reply With Quote
The Following User Says Thank You to greenjoe For This Useful Post:
UltArc (09-10-2012)
Old 08-07-2012, 07:09 PM   #5 (permalink)
Master EcoModder
 
sendler's Avatar
 
Join Date: May 2011
Location: Syracuse, NY USA
Posts: 2,935

Honda CBR250R FI Single - '11 Honda CBR250R
90 day: 105.14 mpg (US)

2001 Honda Insight stick - '01 Honda Insight manual
90 day: 60.68 mpg (US)

2009 Honda Fit auto - '09 Honda Fit Auto
90 day: 38.51 mpg (US)

PCX153 - '13 Honda PCX150
90 day: 104.48 mpg (US)

2015 Yamaha R3 - '15 Yamaha R3
90 day: 80.94 mpg (US)

Ninja650 - '19 Kawasaki Ninja 650
90 day: 72.57 mpg (US)
Thanks: 326
Thanked 1,312 Times in 966 Posts
Can't beat the price.
  Reply With Quote
Old 08-12-2012, 02:33 PM   #6 (permalink)
EcoModding Lurker
 
greenjoe's Avatar
 
Join Date: Dec 2010
Location: Tennessee
Posts: 46
Thanks: 8
Thanked 8 Times in 5 Posts
Put on another 150 miles this week and ended up with a disappointing 61.9mpg. I think a big part of that could be from lowering the bike, it now stands alot straighter when on the sidestand, allowing more fuel in the tank before it gets to the filler neck. Also made a 16t front sprocket & will try it with 38t rear.
  Reply With Quote
Old 08-12-2012, 02:44 PM   #7 (permalink)
Master EcoModder
 
sendler's Avatar
 
Join Date: May 2011
Location: Syracuse, NY USA
Posts: 2,935

Honda CBR250R FI Single - '11 Honda CBR250R
90 day: 105.14 mpg (US)

2001 Honda Insight stick - '01 Honda Insight manual
90 day: 60.68 mpg (US)

2009 Honda Fit auto - '09 Honda Fit Auto
90 day: 38.51 mpg (US)

PCX153 - '13 Honda PCX150
90 day: 104.48 mpg (US)

2015 Yamaha R3 - '15 Yamaha R3
90 day: 80.94 mpg (US)

Ninja650 - '19 Kawasaki Ninja 650
90 day: 72.57 mpg (US)
Thanks: 326
Thanked 1,312 Times in 966 Posts
Quote:
Originally Posted by greenjoe View Post
Put on another 150 miles this week and ended up with a disappointing 61.9mpg. I think a big part of that could be from lowering the bike, it now stands alot straighter when on the sidestand, allowing more fuel in the tank before it gets to the filler neck. Also made a 16t front sprocket & will try it with 38t rear.
The best way to get super accurate fill ups is to use the same pump everytime and stand over the bike to keep it level and rock it once in a while as you get near the top. Find a part of the fill plate inside the filler neck that you can see and fill until the fuel just breaks tension and washes over it as you rock.
  Reply With Quote
Old 08-12-2012, 02:50 PM   #8 (permalink)
Master EcoModder
 
Join Date: Sep 2009
Posts: 5,927
Thanks: 877
Thanked 2,020 Times in 1,303 Posts
The last 3 times I filled the TU250X I got 2.36,2.37 and 2.38 gallons. Within .02 gallons difference. I hold it vertical and fill until the gas just touches all of the bottom of the neck. Less than 2.5 MPG difference between the two tanks I have measured. The third tank is full waiting for this week beginning Monday, weather permitting. $8.14, $8.17 and $8.32, price went up this week.

regards
Mech
  Reply With Quote
Old 08-12-2012, 02:59 PM   #9 (permalink)
EcoModding Lurker
 
greenjoe's Avatar
 
Join Date: Dec 2010
Location: Tennessee
Posts: 46
Thanks: 8
Thanked 8 Times in 5 Posts
I'm just leary on filling all the way up that way, afraid I'll lose some out the overflow when I put it back on the stand to go in and pay. Maybe a centerstand would remidy this? Thanks for the advice!
  Reply With Quote
Old 08-12-2012, 07:37 PM   #10 (permalink)
EcoModding Lurker
 
Join Date: Jan 2012
Location: California
Posts: 40

Hyosung - '07 Hyosung gt250r
90 day: 55.49 mpg (US)

Burgman - '07 Burgman 650 k7
Thanks: 8
Thanked 7 Times in 6 Posts
Coincidentally, I also modded my 07' gt250r following in the footsteps of L&S/ Allen and plan on riding the Barstow race later this year. I haven't test rode it enough to get an mpg reading yet. Still need to find a cheap source for aluminum sheets.

How did you mod the handlebars? Still using the same clamps? If not I am interested. I plan on converting the clip-ons to stock to make it easier to travel long distances.

The biggest obstacle with this bike is to make an aerodynamic front end, but at the same time keep the inverted forks clean.
How did you lower the front end? Change internal fork spring size?
If you fill up after 200+ miles the fill up error will be miniscule.
Good luck. Keep us updated.


Last edited by hyper-miler; 08-12-2012 at 07:43 PM..
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com