All Things Moto! Dirtbike Forums

Go Back   All Things Moto! Dirtbike Forums > Dirt Bike - ATV - Suspension Forums > 2-Stroke Dirt Bike Forums > 2-Stroke Dirt Bikes - KTM

Reply
 
LinkBack Thread Tools
  #1  
Old 08-04-2015, 06:17 AM
Beginner Class
 
Join Date: Aug 2015
Last Online: 08-07-2015 09:06 AM
Location: Australia
Posts: 7
Default 250Sx Jetting

     

What should i run for desert racing?
Reply With Quote
  #2  
Old 08-05-2019, 09:09 PM
Beginner Class
 
Join Date: Jun 2011
Last Online: 10-28-2019 01:31 PM
Location: Paraguay
Posts: 25
Default

Just make sure your main jet is not too lean. You can know for sure by looking at the underside of the piston crown. If it is black then the jet is too small and the engine is running too hot.
Reply With Quote
  #3  
Old 10-01-2019, 01:08 AM
Beginner Class
 
Join Date: Jun 2011
Last Online: 10-28-2019 01:31 PM
Location: Paraguay
Posts: 25
Default

too lean also causes carbon on the top of the piston. Close to the transfer ports there should be some clean areas on the top of the piston from the fresh air/gas charge keeping it cool there.
Reply With Quote
Reply

  All Things Moto! Dirtbike Forums > Dirt Bike - ATV - Suspension Forums > 2-Stroke Dirt Bike Forums > 2-Stroke Dirt Bikes - KTM


Thread Tools


Similar Threads for: 250Sx Jetting
Thread Thread Starter Forum Replies Last Post
Yz250 or 250Sx ? Eproductions What Dirt Bike or ATV 4 09-01-2015 08:27 PM
250sx Jetting 2Smokelove 2-Stroke Dirt Bikes - KTM 0 10-03-2014 09:11 PM
ktm 250sx at unadilla speedysvetz Photo & Video 3 08-22-2013 05:00 PM
Your KTM 250SX-F Aus_Rider_22 4-Stroke Dirt Bikes - KTM 4 02-02-2006 12:38 AM
Need some jetting help - 250SX DareDevil 2-Stroke Dirt Bikes - KTM 4 07-20-2005 12:46 PM


All times are GMT -6. The time now is 06:31 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright ©2002-2019, JDub Consulting, Inc. All Right Reserved.