LCGB Forums

The ability to post messages is restricted to LCGB members. Any questions contact us at lcgbadmin@googlemail.com

Fuel Economy

Need help with a tuning kit, how do you tune your scooter, which kit should I choose, and all general tuning and modifcations questions are for in here.

Fuel Economy

Postby GExS » Tue May 10, 2022 12:03 am

With petrol still going up, what kits are producing the best fuel economy in MPG?
GExS
 
Posts: 50
Joined: Sat Aug 15, 2020 8:08 pm

Re: Fuel Economy

Postby Rich Oswald » Tue May 10, 2022 11:18 am

TBH, I don't think economy has much to do with kits themselves. It's all about the set up. It's more to do with the carb' size and the jetting, the state of tune, the exhaust and its type, the scooter itself (ie: S1/2 or S3/GP), the weather, the size of the rider and the way that the rider, rides!

Rich'
User avatar
Rich Oswald
 
Posts: 8746
Joined: Fri May 30, 2014 3:30 pm
Location: Wiseman From The East (East Of The Pennines That Is)

Re: Fuel Economy

Postby Solid Air » Tue May 10, 2022 11:49 am

GExS wrote:With petrol still going up, what kits are producing the best fuel economy in MPG?

Standard ;)
User avatar
Solid Air
 
Posts: 979
Joined: Sun Jun 01, 2014 10:58 pm
Location: Cambridge

Re: Fuel Economy

Postby Rich Oswald » Tue May 10, 2022 12:23 pm

Solid Air wrote:
GExS wrote:With petrol still going up, what kits are producing the best fuel economy in MPG?

Standard ;)


Agreed!
User avatar
Rich Oswald
 
Posts: 8746
Joined: Fri May 30, 2014 3:30 pm
Location: Wiseman From The East (East Of The Pennines That Is)

Re: Fuel Economy

Postby Solid Air » Tue May 10, 2022 1:12 pm

Rich Oswald wrote:
Solid Air wrote:
GExS wrote:With petrol still going up, what kits are producing the best fuel economy in MPG?

Standard ;)


Agreed!


But keeping it standard is a completely different issue isn't it Rich?! :lol: I'm not sure it's possible for most riders to do that, I know I can't! Sod the MPG :twisted:
User avatar
Solid Air
 
Posts: 979
Joined: Sun Jun 01, 2014 10:58 pm
Location: Cambridge

Re: Fuel Economy

Postby MickYork » Tue May 10, 2022 3:05 pm

Weather conditions are a big factor. Get a strong headwind or steep hills and your mpg can plummit, especially if you're struggling with gearing. With my Avanti, Franspeed Race and 35mm Mikuni, I'm happy if I get 40mpg.....which I do sometimes but it cango to less than 30 if heavy on throttle or bad headwind
MickYork
 
Posts: 1476
Joined: Sun Jun 01, 2014 8:37 am

Re: Fuel Economy

Postby Rich Oswald » Tue May 10, 2022 6:00 pm

Agreed![/quote]

But keeping it standard is a completely different issue isn't it Rich?! :lol: I'm not sure it's possible for most riders to do that, I know I can't! Sod the MPG :twisted:[/quote]

Me neither, fun factor is far better than mpg. :P
User avatar
Rich Oswald
 
Posts: 8746
Joined: Fri May 30, 2014 3:30 pm
Location: Wiseman From The East (East Of The Pennines That Is)

Re: Fuel Economy

Postby GExS » Wed May 11, 2022 6:46 pm

I’ve heard GT kits with the reed valves can do economical.

I use a Suzuki 185 conversion with a 60x115 crank, 22 Jetex and standard exhaust. It’s very economical and quite quick.
GExS
 
Posts: 50
Joined: Sat Aug 15, 2020 8:08 pm

Re: Fuel Economy

Postby Nigel. S » Wed May 11, 2022 8:52 pm

My RT195 (198 or whatever it is a 60 crank gives you) gave me around 13.5 miles/litre going to Moffat and back. Not going too mad (Mostly. Gave it a good blat on A6 back to Penrith) as new rings, clutch spider, plates, which had yet to have a good run.
Nigel. S
 
Posts: 281
Joined: Fri May 30, 2014 11:47 pm

Re: Fuel Economy

Postby Leotech » Thu May 12, 2022 8:33 am

My RT235 with a reed gave about 13 miles per litre going to Moffat and back, Mixed riding, Motorway and A & B roads. I'm quite happy with that.


£2 a litre for E5 on the M6 near Carlisle, I'm not quite happy with that!
User avatar
Leotech
 
Posts: 246
Joined: Wed Jan 13, 2016 7:15 pm

Re: Fuel Economy

Postby Solid Air » Thu May 12, 2022 10:00 am

GExS wrote:I’ve heard GT kits with the reed valves can do economical.

I use a Suzuki 185 conversion with a 60x115 crank, 22 Jetex and standard exhaust. It’s very economical and quite quick.

Yes the GT with a smallish carb is economical and a good little kit BUT if you're thinking of changing to that from what you've got I wouldn't bother. They are very similar and what you'd pay out wouldn't reward you with performance or mpg to justify it.
User avatar
Solid Air
 
Posts: 979
Joined: Sun Jun 01, 2014 10:58 pm
Location: Cambridge

Re: Fuel Economy

Postby gp200ts1 » Thu May 12, 2022 10:09 am

My avanti with a phbh 30mm and an exbox st gives me about 80 miles to the tank. Don’t really care of the cost of fuel because the joy of riding the scoot far outweighs the monetary cost.
gp200ts1
 
Posts: 255
Joined: Fri May 30, 2014 2:43 pm

Re: Fuel Economy

Postby Warkton Tornado No.1 » Thu May 12, 2022 12:14 pm

Significant factors that I believe constructive to fuel economy:

With any static ignition, don't go 'safe' & then some. Even on a tuned engine, as long as premium fuels are used, it's unlikely timing needs to be backed off more than to 19°BTDC IMO.

A good oil that can work @ 2% can prove economical, though this subject has been discussed endlessly :roll:

An adequate, 'uphill' remote air filter that completely obviates the issue of saturation of the element (& your left loon pants leg) is a no-brainer. Unfortunately, even modified OEM filter set-ups will stifle any engine's potential even with moderate levels of tune beyond just the 'bolt on kit' scenario, which inevitably involves a venturi size of above 26 mm IMO....
Warkton Tornado No.1
 
Posts: 2112
Joined: Sun Jan 11, 2015 1:27 pm

Re: Fuel Economy

Postby Storkfoot » Thu May 12, 2022 12:56 pm

I have run my GT186 with three different exhausts and two different carbs over the last 9 years, or so. I had the barrel modestly tuned a couple of years back when it needed a rebore.

I don’t religiously monitor miles per litre but, having reduced the size of the carb recently, I did a couple of weeks ago.

Anyway, in a former set up of a PHBH30, remote filter, non tuned and early MB/bgm Clubman, it did about 14 miles to the litre on a run to Kelso about 6 or 7 years ago.

Now, with a smaller carb, a Mikuni TM24, remote filter, a bit of tuning and an exhaust that revs higher, an Avanti Xbox, it only produced 12.5 miles to the litre on a recent run of 170 miles.

I know this isn’t a great comparison, given the state of tune and exhaust were changed as well as the carb, but it does perhaps show that a smaller carburettor doesn’t necessarily bring with it substantially better fuel consumption.
User avatar
Storkfoot
 
Posts: 2102
Joined: Fri May 30, 2014 8:59 pm
Location: Merseyside

Re: Fuel Economy

Postby Bilko » Mon May 16, 2022 4:49 pm

I’ve debated putting my 25mm PHBL on my Reed valve iron 225 to see if I can squeeze some more MPG. But with the 30mm Dellorto it’s set up near perfect and I don’t want to faff about with it when I’m leaving for France/Belgium next week.
User avatar
Bilko
 
Posts: 375
Joined: Fri May 30, 2014 7:53 pm
Location: Belfast, Northern Ireland

Re: Fuel Economy

Postby Mr G in NYC » Thu May 19, 2022 12:07 am

A stock 125 or 150 will be best on petrol , scootering as it used to be !! G
Mr G in NYC
 
Posts: 613
Joined: Sat May 31, 2014 10:29 pm

Re: Fuel Economy

Postby jonashford » Sun May 22, 2022 12:35 pm

Targa is very good on fuel last weekend on 275r getting about 14 miles per litre at rough calculation
jonashford
 
Posts: 295
Joined: Fri May 30, 2014 5:43 am
Location: Louth Scooterists


Return to Tuning & Kits

Who is online

Users browsing this forum: No registered users and 10 guests