Sxr 849 tuning

[Mbien34e5]

Trying to get my new 849 motor from group k tuned. Stock exhaust and ignition, carbs have flame arrestors and choke plates removed. Jets are 77.5 and 137.5 pop off around 24psi. It stumbles hard off the line cleans up about 40-70% throttle and falls on its face full throttle only about 5800-5900 rpm. Any advice on getting this thing tuned would be appreciated

 

[kevbo]

Im sure this is not what you want to hear but......... You need to learn how to tune carbs or else pay someone else to do it. Asking here is useless because nobody can know exactly what your engine needs. You can learn a lot from tuning a cheap leaf blower first.

 

[Mbien34e5]

Im sure this is not what you want to hear but......... You need to learn how to tune carbs or else pay someone else to do it. Asking here is useless because nobody can know exactly what your engine needs. You can learn a lot from tuning a cheap leaf blower first.

More or less just trying to see if my jets are in the right ballpark. I appreciate your help though.

 

[Baja 252]

I ran the Group K 849 kit for several years, but unfortunately I don't know the jet sizes. When I bought it they set the carbs up for me. I would call them, I would think they would help get you in the ballpark.

 

[fastgtfairlane]

Sounds lean. +1 on contacting groupk and where to go. They should be able to help you since they did the work they should know what their setup needs and should get you close.

 

[Big Kahuna]

Errrrr. If GroupK built your motor reach out to them for jetting.