Main Jetting on a 125


5 replies to this topic
  • rookie019

Posted 04 April 2012 - 11:56 AM

#1

Just looking for an opinion on what I should run for jets on my tt-r. I've cut the top of the airbox out, removed the screen, and added a bbr/Uni filter. Everything else is stock, and I'm roughly 200 feet above sealevel. I know 110 is good for the factory bike but wasn't sure if that would be adequate or if I should step up to a 112. Also does anyone have any tips for removing the filter from the airbox? Mine seems to have gotten stuck :/

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  • Racer

Posted 04 April 2012 - 06:29 PM

#2

The  #110 should be good with an opened airbox, you could try the #112 but I'm thinking you may have a bit of a stutter on top due to being too rich. The only way to tell for sure is to try it. As for the filter, pull harder lol!

  • rookie019

Posted 05 April 2012 - 11:38 AM

#3

Thanks! Are the jets still offered in the TT store? I searched for stuff for my bike and found this for the main:
http://shop.thumpert...0-p4653326.html
and this for the pilot:
http://shop.thumpert...5-p4650750.html
Are these the right ones?

  • Racer

Posted 05 April 2012 - 09:41 PM

#4

The correct main is the large round not the small round as listed, although I have used the small round Mikuni in a pinch but with the small round you won't be able to use the small plastic fuel splash guard. The pilot jet looks right but I actually prefer the #20 over the #17.5. Be sure to adjust the air screw after installing the new jets, a good starting is 1 1/2 to 2 turns out from seated position.

  • rookie019

Posted 06 April 2012 - 09:22 AM

#5

yeah even the tech page says they're large round type. not sure why I though they were small. anyway thanks for the help!

  • Racer

Posted 06 April 2012 - 10:31 AM

#6

You bet, let me know how you make out!




 
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