batrider
VIP MEMBER
- Joined
- Aug 9, 2008
- Messages
- 2,370
![United-States Country flag](https://www.accessnorton.com/images/flags/shiny/32/United-States.png)
The difference between a 105 NJ and a 106 NJ is like night and day. I think you will find the 105s way too lean. On my '72 Combat the 106s when new are just right. But I can start to feel a difference about 2000 miles later and need to replace at 4-5000 miles. The needles do wear also so I replace both at the same time. Probably a 1055 needle jet could extend this replacement interval on my bike. As it stands I'm only putting about 1500 mi a year on now.
The way I gauge the wear is to ride in 2nd gear at about 25mph on a flat surface with no load on the engine. With new needle jets it is smooth. With worn jets it will go uhhhh uh uhhhh uh uhhhh uh.
Very scientific description I know.
Russ
The way I gauge the wear is to ride in 2nd gear at about 25mph on a flat surface with no load on the engine. With new needle jets it is smooth. With worn jets it will go uhhhh uh uhhhh uh uhhhh uh.
![Smile :) :)](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png)
Russ