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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-13-2017, 11:21 PM   #51 (permalink)
Master EcoModder
 
Join Date: Jul 2011
Location: WI
Posts: 422
Thanks: 131
Thanked 68 Times in 46 Posts
Quote:
Originally Posted by cRiPpLe_rOoStEr View Post
This Derbi looks so small. This in turn might lead it to be funny to ride on mountain roads.
It is small, but my son is also 6' tall. It's about 200 pounds wet.

It's got a decent frame, inverted forks, and sticky tires. On the right road, with the right rider, it would be hard to keep up with.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-14-2017, 06:28 PM   #52 (permalink)
Master EcoModder
 
Join Date: Feb 2010
Location: Elmira, NY
Posts: 1,464
Thanks: 211
Thanked 241 Times in 203 Posts
For those who are interested there is a number of videos and articles on tuning and porting 2 stroke engines. The pdf of Gordon Jennings's tuning guide is perhaps the most cited.
  Reply With Quote
Old 03-14-2017, 06:45 PM   #53 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 5,620
Thanks: 0
Thanked 537 Times in 482 Posts
Sometimes it's quite surprising how a rather simple tuning and porting can lead to a great improvement to the performance of a 2-stroke.
  Reply With Quote
Old 03-16-2017, 09:57 AM   #54 (permalink)
EcoModding Lurker
 
Join Date: Sep 2016
Location: dubai
Posts: 12
Thanks: 0
Thanked 1 Time in 1 Post
i love the 2 strokes.owned one rd 350 before,due to maintenance and poor availability of parts made me to sell it.but still love the ride
  Reply With Quote
Old 03-17-2017, 12:35 AM   #55 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 5,620
Thanks: 0
Thanked 537 Times in 482 Posts
Limited availability of replacement parts has been a concern here in Brazil too. I have already seen some Yamaha DT 180's retrofitted with Honda CG 125 engines and the owner of one of those told me his main motivation for that move was exactly this.
  Reply With Quote
Old 03-23-2017, 12:46 AM   #56 (permalink)
Master EcoModder
 
Stubby79's Avatar
 
Join Date: Sep 2012
Location: Victoria, BC
Posts: 728

Topoff (RIP) - '92 Geo Metro LSi
90 day: 48.54 mpg (US)

'91 Miata - '91 Mazda Miata
90 day: 27.11 mpg (US)

'86 Fiero GT - '86 Pontiac Fiero GT

Purple Penny Pincher - '95 Pontiac Firefly Base
90 day: 43.68 mpg (US)

Jett-Black - '01 Volkswagen Jetta
90 day: 39.32 mpg (US)

Firefly EV - '98 Pontiac Firefly EV
90 day: 107.65 mpg (US)
Thanks: 36
Thanked 218 Times in 159 Posts
Quote:
Originally Posted by earl92 View Post
i have a 4 stroke and its to fast to ride. but its quite heavey and have small pickup. how to increase pickup any one suggest me ?
Change your final drive ratio by putting on a larger rear sprocket. Less top speed, and probably worse gas mileage, but you'll get more acceleration.
__________________

  Reply With Quote
Old 03-26-2017, 09:12 PM   #57 (permalink)
EcoModding Lurker
 
Join Date: Mar 2017
Location: United States
Posts: 22
Thanks: 10
Thanked 2 Times in 2 Posts
I have a 2010 YZ250. I love 2 strokes. Sound smell and simplicity.
I also have a 2 stroke powered snowmobile. A 580 ski doo double.
  Reply With Quote
Old 03-31-2017, 08:09 PM   #58 (permalink)
EcoModding Lurker
 
Join Date: Jan 2008
Location: Maine
Posts: 57
Thanks: 3
Thanked 1 Time in 1 Post
I like (and own several) old 2-strokes. They're horrendously dirty compared to modern 4-strokes but they don't get ridden that much so the guilt factor is pretty low. My T-500 gets reasonable gas mileage (as does my H1) but my H2 is horrible. It's ported pretty heavily though and I mostly use it for LSR these days.

If I understood correctly, KTM is bringing a direct-injected 2-stroke to market next year.
  Reply With Quote
Old 04-01-2017, 09:36 AM   #59 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 5,620
Thanks: 0
Thanked 537 Times in 482 Posts
Quote:
Originally Posted by Frank View Post
I like (and own several) old 2-strokes. They're horrendously dirty compared to modern 4-strokes but they don't get ridden that much so the guilt factor is pretty low.
The problem had always been the oil, but nowadays it's been mostly solved due to the synthetic oils that can be used at a lower ratio, get better dilluted and then lead to a cleaner burn (they even decrease the spark plug fouling). There are always those Castor-based oils, renewable, biodegradable, and have a better dillution with the ethanol content currently added to the gasoline.


Quote:
If I understood correctly, KTM is bringing a direct-injected 2-stroke to market next year.
It's been rumored for a long time and still led to nothing.
  Reply With Quote
Old 10-06-2017, 01:28 AM   #60 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 5,620
Thanks: 0
Thanked 537 Times in 482 Posts
Yamaha TT 125


Vemaguet, a local variation of the DKW F94 wagon, made under license by Vemag (which had also assembled Studebaker cars and trucks)


Spotted this kart at a fuel station in Pelotas in 2010

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com