World of jets? Scooter tuning
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World of jets? Scooter tuning
Ive always wondered if the sprees or any carbed scooter sold in NY would be the same as the CA jet wise? Ive tried googling it with no luck. I know some cars are sold with hill assist and some with transmission that wont roll backwards.
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- Elite
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Re: World of jets? Scooter tuning
New York has a mean elevation of 1000 feet above sea level and California has a mean elevation of 2900 ft, that is only a difference of 1900 feet, jetting needs would be very close to each other.
However Colorado has a mean elevation of 6800 feet about sea level and Louisiana has a mean elevation of only 100 feet, those two states should use different jetting, however I don't think that they came with different jets, others can chime in with more information on that. My scooter had high elevation jets listed as optional. People who are not into motorcycles cannot fathom the concept of tuning an engine by changing jets, it is a waste of time and words trying to explain it to those individuals.
I have not heard of any scooters with hill assist, perhaps you could market a kit.
However Colorado has a mean elevation of 6800 feet about sea level and Louisiana has a mean elevation of only 100 feet, those two states should use different jetting, however I don't think that they came with different jets, others can chime in with more information on that. My scooter had high elevation jets listed as optional. People who are not into motorcycles cannot fathom the concept of tuning an engine by changing jets, it is a waste of time and words trying to explain it to those individuals.
I have not heard of any scooters with hill assist, perhaps you could market a kit.
1984 Aero 125 57 mph for sale.
Elite 150 64 mph for sale.
Elite 250 77 mph. for sale.
Red Honda Grom, modded to 250cc, 87 mph.
GSXR 1000 168 mph. My new favorite, scooters seems way too slow now.
Elite 150 64 mph for sale.
Elite 250 77 mph. for sale.
Red Honda Grom, modded to 250cc, 87 mph.
GSXR 1000 168 mph. My new favorite, scooters seems way too slow now.
- patthesoundguy
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Re: World of jets? Scooter tuning
The only jets on the microfiche are 68 and 65 for the spree as far as I remember. The 65 is for the restricted Iowa spree. The jetting would need to be smaller for the super high elevations wouldn't it?
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84 Spree stock
84 Spree Dio AF18E MHR Cylinder Arrow Pipe 28mm OKO
80 Express, 47mm DR BBKit, Weak Ends Intake, Boyesen Dual stage reeds, 19mm Delorto carb, MLM pipe
79 Express
85 Aero 80 stock
84 elite 125 stock
84 Spree stock
84 Spree Dio AF18E MHR Cylinder Arrow Pipe 28mm OKO
80 Express, 47mm DR BBKit, Weak Ends Intake, Boyesen Dual stage reeds, 19mm Delorto carb, MLM pipe
79 Express
85 Aero 80 stock
84 elite 125 stock
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Re: World of jets? Scooter tuning
I have taken my stock carb, stock cylinder, and stock block 98 elite sr from 562 feet in st louis all the way to 10,800 in the Rocky Mountain national forest with out changing jets. Obviously at 10k +elevation it was a little sluggish to start off but after it was not much difference. I figured I would have washed out a plug but at the end of the day there wasn't any issues. I bring my scoots to the mountains every chance I get and even my built bikes run fine. It sounds odd but it's true.
Back when the spree was produced c.a.r.b. was not yet worried about scooters. Carbs been around since Reagan but he wasn't worried about 49cc bikes, only 100 cc and above. I think it was in the 90s when they cracked down on 2 stroke 49cc scooters.
Back when the spree was produced c.a.r.b. was not yet worried about scooters. Carbs been around since Reagan but he wasn't worried about 49cc bikes, only 100 cc and above. I think it was in the 90s when they cracked down on 2 stroke 49cc scooters.
Re: World of jets? Scooter tuning
Thanks for the response guys, now I have another question. How would jetting be on 0 Celsius vs 60? I would assume the colder air would make it run leaner?
- Wheelman-111
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Re: World of jets? Scooter tuning
Greetings:
You are correct, air-cooled scooters actually overheat more in very cold weather. Weird huh?
You are correct, air-cooled scooters actually overheat more in very cold weather. Weird huh?
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
Re: World of jets? Scooter tuning
So that brings me to my next question, could you put a fuel injector on a carbed scooter redneck style? Like say a tiny injector meant for a smart car or and just kinda modified it and sealed it to the carb? Im just trying to pop the bubbles to understanding jetting.
1993 ch80, swapped with a ch250
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2021 DRZ400sm
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Re: World of jets? Scooter tuning
Adapting a small injector from say a motorcycle or lawnmower is only the beginning, you will need a microprocessor as well as input sensors, and a pressurized fuel sytem. But yes it could be done.
If you choose this journey, please post your pictures and story along the way.
I think it would be far easier to just buy a fuel injected scooter.
If you choose this journey, please post your pictures and story along the way.
I think it would be far easier to just buy a fuel injected scooter.
1984 Aero 125 57 mph for sale.
Elite 150 64 mph for sale.
Elite 250 77 mph. for sale.
Red Honda Grom, modded to 250cc, 87 mph.
GSXR 1000 168 mph. My new favorite, scooters seems way too slow now.
Elite 150 64 mph for sale.
Elite 250 77 mph. for sale.
Red Honda Grom, modded to 250cc, 87 mph.
GSXR 1000 168 mph. My new favorite, scooters seems way too slow now.
Re: World of jets? Scooter tuning
Now i wanna see a sr50 spree swapJohnniespeed wrote:Adapting a small injector from say a motorcycle or lawnmower is only the beginning, you will need a microprocessor as well as input sensors, and a pressurized fuel sytem. But yes it could be done.
If you choose this journey, please post your pictures and story along the way.
I think it would be far easier to just buy a fuel injected scooter.
- patthesoundguy
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Re: World of jets? Scooter tuning
At one point not that long ago I had found a kit online to add fuel injection to most small engines including scooters, it diddnt look too complicated. But it was pricey but cant remember how much it was
Dude! Ya Can't Fix Stupid!
84 Spree stock
84 Spree Dio AF18E MHR Cylinder Arrow Pipe 28mm OKO
80 Express, 47mm DR BBKit, Weak Ends Intake, Boyesen Dual stage reeds, 19mm Delorto carb, MLM pipe
79 Express
85 Aero 80 stock
84 elite 125 stock
84 Spree stock
84 Spree Dio AF18E MHR Cylinder Arrow Pipe 28mm OKO
80 Express, 47mm DR BBKit, Weak Ends Intake, Boyesen Dual stage reeds, 19mm Delorto carb, MLM pipe
79 Express
85 Aero 80 stock
84 elite 125 stock
Re: World of jets? Scooter tuning
What would be good though is if i found a sr50 engine and did a 70cc bbk on it with the 80 pound spree frame, could do 120ish`140ish kph. That thing would rip, but i can't find a engine or casing anywhere, not even from apprila.
Re: World of jets? Scooter tuning
MrJumps wrote:What would be good though is if i found a sr50 engine and did a 70cc bbk on it with the 80 pound spree frame, could do 120ish`140ish kph. That thing would rip, but i can't find a engine or casing anywhere, not even from apprila.
Never mind found just the crank case for 550 euros
Re: World of jets? Scooter tuning
I have a 09' SR50 70cc Malossi fuel injected engine sitting in my garage! It was my first scooter $3500!! DirtyD got me into the game. It did 50-55 sitting up after the kit and a pipe along with tranny mods. I bought spare cases and converted to carb. I just bought a 94cc malossi mhr team cylinder, stroker crank and pipe for it, it's on its way to Michigan from Italy.
01 Honda Elite S 120cc Taida H20
78 Honda Hobbit Athena
78 Honda Express/Hobbit Stage6/Athena LC 70
00 Gilera Runner PM Tuning 172
09 Aprillia SR50 Malossi Team MHR
81 Puch ZA50 Polini
71 CT70 Blue
79 Z50 Red
78 Honda Hobbit Athena
78 Honda Express/Hobbit Stage6/Athena LC 70
00 Gilera Runner PM Tuning 172
09 Aprillia SR50 Malossi Team MHR
81 Puch ZA50 Polini
71 CT70 Blue
79 Z50 Red
Re: World of jets? Scooter tuning
whitey wrote:I have a 09' SR50 70cc Malossi fuel injected engine sitting in my garage! It was my first scooter $3500!! DirtyD got me into the game. It did 50-55 sitting up after the kit and a pipe along with tranny mods. I bought spare cases and converted to carb. I just bought a 94cc malossi mhr team cylinder, stroker crank and pipe for it, it's on its way to Michigan from Italy.
Put it in a spree
Re: World of jets? Scooter tuning
I don't own a spree yet but I have adapted a piaggio athena/stage6 pro race cylinder to a Honda hobbit engine and mounted it to a honda express frame. I got it up to 67mph till I slowed down before the railroad tracks. Later I found I cracked the subframe, which explained the flexing I felt when the power band hit.
01 Honda Elite S 120cc Taida H20
78 Honda Hobbit Athena
78 Honda Express/Hobbit Stage6/Athena LC 70
00 Gilera Runner PM Tuning 172
09 Aprillia SR50 Malossi Team MHR
81 Puch ZA50 Polini
71 CT70 Blue
79 Z50 Red
78 Honda Hobbit Athena
78 Honda Express/Hobbit Stage6/Athena LC 70
00 Gilera Runner PM Tuning 172
09 Aprillia SR50 Malossi Team MHR
81 Puch ZA50 Polini
71 CT70 Blue
79 Z50 Red