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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-04-2023, 01:13 PM   #1 (permalink)
EcoModding Apprentice
 
Join Date: Nov 2020
Location: The Pas, Manitoba
Posts: 189
Thanks: 242
Thanked 94 Times in 68 Posts
Aprilia SR 50 R

Hey all,

I have been thinking about modifying my 2007 Aprilia SR 50 R. Itís a 2-stroke 50cc with an EFi system that gets 90-120 MPG as I commute with 50-80 km/h speeds. Itís already very clapped out so I donít feel bad about chopping it.

My original big plan was to chop it into a recumbent bike, inspired by Akira. Iíve been so busy with cars that I donít want to do that right now. I figure a better idea is to use coroplast and aero mod the existing frame. I have lots of coroplast already so it should just cost me for pop rivets and paint. Doesnít have to look good as it already brings laughter lmao.


So what do you think?



Attached Thumbnails
Click image for larger version

Name:	D4BA9B15-8BC8-4899-928B-741B9CA26076.jpg
Views:	247
Size:	19.0 KB
ID:	33322   Click image for larger version

Name:	D3DEFB69-CE24-423A-A4CB-B65B7CDA70D6.jpg
Views:	261
Size:	36.3 KB
ID:	33323  
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-09-2023, 03:13 AM   #2 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 11,741
Thanks: 0
Thanked 1,484 Times in 1,322 Posts
Is that engine fitted with the direct-injection system originally developed by Orbital?
  Reply With Quote
Old 02-09-2023, 07:23 PM   #3 (permalink)
EcoModding Apprentice
 
Join Date: Nov 2020
Location: The Pas, Manitoba
Posts: 189
Thanks: 242
Thanked 94 Times in 68 Posts
I’m not sure. Mine has the Morini engine with Ditech injection. I believe it works off some sort of crazy air compressor setup.
  Reply With Quote
Old 02-09-2023, 07:29 PM   #4 (permalink)
EcoModding Apprentice
 
Join Date: Nov 2020
Location: The Pas, Manitoba
Posts: 189
Thanks: 242
Thanked 94 Times in 68 Posts
I stripped the fairing pieces of the bike to get a good look at the frame. I figured I have enough time to do some modest changes on the bike.

Right away, I noticed that the helmet storage area (under the seat) could be used as a spot to sit.



I think this will work perfect for the first stage of modifying this bike. It seems like it wonít take much effort to make a seat and move the feet down a bit. Itís not much for drag reduction but it will absolutely cut the frontal area down. Iím curious to see if handling will improve.
Attached Thumbnails
Click image for larger version

Name:	B9F6097E-17C6-4035-A9B9-E5C3AE3C2CE0.jpg
Views:	228
Size:	22.4 KB
ID:	33406  
  Reply With Quote
Old 02-11-2023, 12:31 PM   #5 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 11,741
Thanks: 0
Thanked 1,484 Times in 1,322 Posts
Quote:
Originally Posted by JacobLeSann View Post
I believe it works off some sort of crazy air compressor setup.
That air-assisted injection was developed by Orbital, as a guide to the fuel spraying pattern.
  Reply With Quote
The Following User Says Thank You to cRiPpLe_rOoStEr For This Useful Post:
JacobLeSann (02-13-2023)
Old 02-19-2023, 12:34 AM   #6 (permalink)
EcoModding Apprentice
 
Join Date: Nov 2020
Location: The Pas, Manitoba
Posts: 189
Thanks: 242
Thanked 94 Times in 68 Posts
Akira?



So far so good!

Havenít had to make all that many changes to get the seat in. Just careful marking and cutting with handheld jigsaw. I realized fast that I couldnít fit into the helmet bucket so I cut most of it out and made a custom seat. I used a piece of flat 1/4Ē plexiglas and cut a blank out. Tried to use a heat gun to bend it but it just snapped. I put it in the oven at 300 degrees until it became malleable and then I notched it on top of the desk chair in my shop and sat down. Very hot but itís nicely molded to my rear.

Mechanically, all I needed to do was reroute the fuel filter. You can see in my photos that Iíve carved out the right side of the seat bucket, and stitched in some plastic. Thatís to make room for the new routing. Iíve also removed the stock air box and will be replacing it with a washable cone filter and an air box of my design. The stock one is good from a dust perspective but very restrictive and way too bespoke to find replacement filter otherwise.


Anyhow, I feel like Kaneda. More scrunched up, though. Almost like riding a BMX. I donít mind; itís much better than how I rode it before.



Hereís whatís on my mind for tomorrow. I plan to mount the storage pod right behind my back and use some plastic to streamline it into a nice kammback tail. I also want to use some scrap plastic to clean up little open areas and try and smooth flow. Wheel discs too, if I can. Most importantly, a dustbin fairing for the front. The radiator is mounted above the front wheel, so a dustbin will work perfect. It even has exit ducts on the stock fairing behind the front wheel opening!


Excited to see what kind of numbers I get. Wonder how fast itíll go.
Attached Thumbnails
Click image for larger version

Name:	8954F57B-7C6E-4878-98C0-0CE72A2DA47D.jpg
Views:	218
Size:	98.3 KB
ID:	33454   Click image for larger version

Name:	059E94A5-1AB4-4C4B-8AF2-18DD79E20475.jpg
Views:	14
Size:	91.3 KB
ID:	33455   Click image for larger version

Name:	9EF0904A-2E14-48C5-85F6-951FC8564556.jpg
Views:	14
Size:	22.4 KB
ID:	33456   Click image for larger version

Name:	26140DEB-8E8A-4739-8FCA-531546025F6B.jpg
Views:	220
Size:	54.5 KB
ID:	33457  
  Reply With Quote
The Following User Says Thank You to JacobLeSann For This Useful Post:
Joggernot (02-19-2023)
Old 02-19-2023, 12:23 PM   #7 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,495
Thanks: 2,813
Thanked 1,057 Times in 643 Posts
Look up Craig Vetter. He has been aermodding scooters for years. It sounds like what he has been doing is exactly what you are trying to do.



So, have you considered laying back, instead of crouching forward ?


Attached Thumbnails
Click image for larger version

Name:	Screenshot_20230219-111431_Chrome.jpg
Views:	205
Size:	31.4 KB
ID:	33462   Click image for larger version

Name:	Screenshot_20230219-111458_Chrome.jpg
Views:	218
Size:	35.1 KB
ID:	33463   Click image for larger version

Name:	Screenshot_20230219-110016_ArtFlow.jpg
Views:	203
Size:	174.5 KB
ID:	33464   Click image for larger version

Name:	Screenshot_20230219-112005_Gallery.jpg
Views:	205
Size:	193.0 KB
ID:	33465  
  Reply With Quote
The Following 3 Users Say Thank You to Cd For This Useful Post:
Grant-53 (02-19-2023), JacobLeSann (03-10-2023), MetroMPG (03-09-2023)
Old 02-19-2023, 12:26 PM   #8 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,495
Thanks: 2,813
Thanked 1,057 Times in 643 Posts
Something that Craig learned, was that crosswinds are brutal when you have a long tail like that.
Window screen allows some of the crosswind air to pass through, while directing the rest of the air in the path you want.

Edit : I was only slightly familiar with the bike.
After looking at it again, I have to say, I would love to see you come close to the look.
The main thing I worry about is safety. You would be so low to the ground that people would not see you - and those that do wouldn't be able to judge at what distance you were because it's so foreign to people. https://commons.m.wikimedia.org/wiki...Akira_moto.jpg

I see you just posted the lay back design. Love it.
Most definitely has the Akira vibes.
I wonder if there is a way to lay back the entire front end without too much work . ( future designs )
I like the angular look too of your sketch.
BTW, You have skills with your art !

Last edited by Cd; 02-19-2023 at 12:59 PM..
  Reply With Quote
The Following User Says Thank You to Cd For This Useful Post:
JacobLeSann (03-10-2023)
Old 02-19-2023, 08:52 PM   #9 (permalink)
Master EcoModder
 
Join Date: Feb 2010
Location: Elmira, NY
Posts: 1,753
Thanks: 312
Thanked 347 Times in 291 Posts
Some states have a minimum seat height laws. A 15% reduction of body shell to a Kamm effect tail would help with the crosswinds. Make sure the center of mass is ahead of the center of pressure.
  Reply With Quote
The Following User Says Thank You to Grant-53 For This Useful Post:
JacobLeSann (03-10-2023)
Old 02-21-2023, 03:12 AM   #10 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 11,741
Thanks: 0
Thanked 1,484 Times in 1,322 Posts
Quote:
Originally Posted by Cd View Post
This position doesn't seem so comfortable.

  Reply With Quote
The Following User Says Thank You to cRiPpLe_rOoStEr For This Useful Post:
JacobLeSann (03-10-2023)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2023, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com