MPG report. Wow
#41
02-21-2013, 04:52 AM
Join Date: Jan 2013
Location: Las Vegas, NV
Posts: 1,422
Hey go cytosis, I figured out the non-vacuum cold start. (Sorry for the thread derail, just saw him pop up and had to mention it).
I think Deej might have brought it up?. It worked in 0ºF the other day. Get on, kickstand up, pump the forks up and down, choke it, fires by the 3rd hit on the starter, if not, rinse and repeat(only had to repeat once).
Back to fuel mileage.
The only real difference I've seen in mpg had to do with re-gearing. With 14-47 I consistently got 60 mpg. With 14-42 I get 63-65mpg. Why? rpm to speed ratio is better stock.
I also think my very cool-cold weather helps, my fuel is more dense than it would be if I were back in Tucson(10-80ºF in NH, 40-110º in Tucson). Which I actually noticed on my EX-500. I got 50mpg in the cooler NE climes for years, I rolled into Tucson and I was lucky to hit 45mpg with slower and more consistent speeds in 6th gear, nothing else changed except environment.
So making the bike cooler(to an extent) by removing the smog crap, putting a higher pressure radiator cap, and what else I don't know, should increase mpg?
I don't really care about my mpg just get a laugh calculating it in my head when I pull up to a pump, go through the long process of gloves off, tank up, gloves on and the guy in the Prius is still pumping and I got off way cheaper and with way more smiles per mile. And even more eco-friendly because my bike is mostly recyclable, but the Prius giant battery is a lot of toxic waste waiting to happen thanks to manufacturing processes. But I digress, again. I apologize. Blame my typing teacher and ADD.
I think Deej might have brought it up?. It worked in 0ºF the other day. Get on, kickstand up, pump the forks up and down, choke it, fires by the 3rd hit on the starter, if not, rinse and repeat(only had to repeat once).
Back to fuel mileage.
The only real difference I've seen in mpg had to do with re-gearing. With 14-47 I consistently got 60 mpg. With 14-42 I get 63-65mpg. Why? rpm to speed ratio is better stock.
I also think my very cool-cold weather helps, my fuel is more dense than it would be if I were back in Tucson(10-80ºF in NH, 40-110º in Tucson). Which I actually noticed on my EX-500. I got 50mpg in the cooler NE climes for years, I rolled into Tucson and I was lucky to hit 45mpg with slower and more consistent speeds in 6th gear, nothing else changed except environment.
So making the bike cooler(to an extent) by removing the smog crap, putting a higher pressure radiator cap, and what else I don't know, should increase mpg?
I don't really care about my mpg just get a laugh calculating it in my head when I pull up to a pump, go through the long process of gloves off, tank up, gloves on and the guy in the Prius is still pumping and I got off way cheaper and with way more smiles per mile. And even more eco-friendly because my bike is mostly recyclable, but the Prius giant battery is a lot of toxic waste waiting to happen thanks to manufacturing processes. But I digress, again. I apologize. Blame my typing teacher and ADD.
#42
02-21-2013, 05:37 PM
If you have not visited this site yet, you may find it helpful in addition to our forum here.
I just found this a couple of days ago. I will just give it this way as it's easier for me.
Google this and you should get it. klx250s homepage
Click the dropbox *carb mods continued* and scroll down and you will see a great pic of the octopus that I am removing. His bike is an 07.
I think you can also find some useful stuff on HMF's site.
I'm pulling the octopus off-capping the front top of carb-Bill Blue plate on the head.
I intend to leave the crankcase vent line (right above the header/muffler connection) where it's at now but will open the hole in the airbox with a 1/2 inch bit.(need to 2bl check that). Some drill it some melt it through.
If I can remember some of the places I've been finding pics I will let you know.
Steve
#43
02-22-2013, 10:12 AM
I'm glad I found this thread and I'm not the only one getting crappy mpg's.
I have an EFI KLX250SF (I live in Thailand) and for what it is this thing drinks it up. Flogging it pretty good constantly at sea level bone stock, on 91 octane, I only get about 55mpg.
For comparison, a BMW 650GS I used to own (also fuel injected) got over 70mpg loaded down touring and my last bike, 1100GS, would get just under 50mpg.
I wouldn't really care as much if the thing had a bigger tank....
I have an EFI KLX250SF (I live in Thailand) and for what it is this thing drinks it up. Flogging it pretty good constantly at sea level bone stock, on 91 octane, I only get about 55mpg.
For comparison, a BMW 650GS I used to own (also fuel injected) got over 70mpg loaded down touring and my last bike, 1100GS, would get just under 50mpg.
I wouldn't really care as much if the thing had a bigger tank....
#44
02-22-2013, 05:48 PM
Join Date: Jan 2013
Location: Central West NSW, Australia
Posts: 143
Comparing a little carburetted 250 to a fuel injected BMW 650 isn't fair. That 650 is loping along at tiny throttle openings and self tuning for the low altitude while the 250 is getting it's neck wrung constantly with fixed tuning. I wouldn't be surprised if the KLX is running lean from the low altitude and needs a little more fuel to bring it's power back up so you can lay off the throttle a bit.
#45
02-22-2013, 06:16 PM
Join Date: Jan 2013
Location: Las Vegas, NV
Posts: 1,422
Comparing a little carburetted 250 to a fuel injected BMW 650 isn't fair. That 650 is loping along at tiny throttle openings and self tuning for the low altitude while the 250 is getting it's neck wrung constantly with fixed tuning. I wouldn't be surprised if the KLX is running lean from the low altitude and needs a little more fuel to bring it's power back up so you can lay off the throttle a bit.
#46
02-23-2013, 03:02 AM
Yes, my KLX is fuel injected so I'm trying to compare apples to apples. I haven't had any other fuel injected bikes other than the beemers-I would be interested to hear people's experience with other fuel injected bikes. One thing is for sure, fuel injection should definitely be getting me better mpg's than a carbed bike!
My drive is some city madness mixed with steep mountains and I typically shift around 6-8k rpm's--definitely not hammering on it like some of you guys do!
My drive is some city madness mixed with steep mountains and I typically shift around 6-8k rpm's--definitely not hammering on it like some of you guys do!
#48
02-23-2013, 01:33 PM
Hey go cytosis, I figured out the non-vacuum cold start. *(Sorry for the thread derail, just saw him pop up and had to mention it). *
I think Deej might have brought it up?. *It worked in 0ºF the other day. *Get on, kickstand up, pump the forks up and down, choke it, fires by the 3rd hit on the starter, if not, rinse and repeat(only had to repeat once).
I think Deej might have brought it up?. *It worked in 0ºF the other day. *Get on, kickstand up, pump the forks up and down, choke it, fires by the 3rd hit on the starter, if not, rinse and repeat(only had to repeat once).
Drilled starter is still your best bet, but even that looses effectiveness at the low temperatures you speak of.
#49
03-02-2013, 01:00 AM
Small aluminum engines? They should be the quickest to get up to temp. It's the crazy cooling sys. that our bikes have. Do your homework on Thermo Bob's mod. My bike is a new bike since I installed his kit. I'm shocked that this bike run's as well as it does, as delivered. Thank's Thermo Bob!
#50
03-02-2013, 08:05 AM
I'm glad I found this thread and I'm not the only one getting crappy mpg's.
I have an EFI KLX250SF (I live in Thailand) and for what it is this thing drinks it up. Flogging it pretty good constantly at sea level bone stock, on 91 octane, I only get about 55mpg.
For comparison, a BMW 650GS I used to own (also fuel injected) got over 70mpg loaded down touring and my last bike, 1100GS, would get just under 50mpg.
I wouldn't really care as much if the thing had a bigger tank....
I have an EFI KLX250SF (I live in Thailand) and for what it is this thing drinks it up. Flogging it pretty good constantly at sea level bone stock, on 91 octane, I only get about 55mpg.
For comparison, a BMW 650GS I used to own (also fuel injected) got over 70mpg loaded down touring and my last bike, 1100GS, would get just under 50mpg.
I wouldn't really care as much if the thing had a bigger tank....