Yamaha Discussions about Yamaha ATVs.

Raptor Stock Jetting Specs???

  #21  
Old 06-12-2019, 06:12 PM
Weekend Warrior
Join Date: Jun 2019
Location: pelitier n.c. by the ocean
Posts: 1
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sixsixt,"05 660/719,,stroked, bbk,stage 3 hc sparks bigcore proform airfilter open airbox...160/165 mains,27.5 pilots, 21/2 turns on air screws .needle in bottom clip. problem is busting out in wot,a little backfire after reving. ran great before adding proform airfilter.changed mains from 150/170 now runs like crap. can you help me? thanks for your time and knowledge.........., david moody.first bike i ever built. pm me at [email protected] and thanks again
 

Last edited by David Moody; 06-12-2019 at 06:18 PM. Reason: adding more.
  #22  
Old Yesterday, 07:41 PM
Weekend Warrior
Join Date: Jun 2019
Posts: 2
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Originally Posted by sixsixT View Post
You left out the pilot jet numbers there slick. Better go back and hit the books.[img]i/expressions/face-icon-small-happy.gif

From what I've seen from Yamaha mechanics they don't get much training on how to work on a raptor either.LOL
So I have a problem I changed all of the Jets back to stock because I was having popping and backfiring now I still have a little backfiring and can get to a higher Rev but don't know what to do now
 
  #23  
Old Yesterday, 08:00 PM
Weekend Warrior
Join Date: Jun 2019
Posts: 2
Default 2002 660 raptor

So I have a problem I changed all of the Jets back to stock because I was having popping and backfiring now I still have a little backfiring and can get to a higher Rev but don't know what to do now
 
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