Despite my bike’s radical intake/exhaust, I’m getting pretty close on jetting and the resulting drivability. The bike idles nicely for full stoplights and takes throttle well from low rpms through the range. I have a miss near WOT above 5K (guess). The plugs are “sooted” a bit still, but I can see some lighter browns beginning to form. The pic below includes some around town riding and necessary idling returning home.
The current set-up: 47.5 pilots
270-Y-0 NJ
“7F6” Dyno Tune JN
145 Main.
So, my next step was to install the Canadian 336-Y-0 NJ with 51X11 JN (just received).
However, upon examination of the needles (pics below with slots aligned), I think the new NJ/JN is going to change everything in a major way. The length difference concerns me. The stock 5HX12 is in the middle, the “7F6” to the right and the 51X11 on the left. Their length measures:
5HX12 – 53.41
7F6 – 57.38
51X11 – 51.38
The stock and Dyno needles are designed to run the original 3mm nylon spacer under the clip. I cannot find any info. whether the 51X11 uses that spacer (?). If it does not, then what about the hole left in the slide?
I think the proper move is to is to install that set-up AND drop the main back to perhaps a 135-137.5. The Canadian set-up is going to be way rich! ??
It appears to me that the Dyno Tune “Stage 3” kit relies on an oversize main, then compensates with a really lean (large) needle to get mid-range correct. Perhaps that was done to keep kit costs down and use the stock NJ.
Another alternative is to tune on my “lollipop” baffle (now full open) to attempt to send back more sound to exhaust port and affect the WOT miss.
I’m hoping someone has experienced switching between a “Dyno” set-up and a “Canadian” set-up to save some garage time.
The current set-up: 47.5 pilots
270-Y-0 NJ
“7F6” Dyno Tune JN
145 Main.
So, my next step was to install the Canadian 336-Y-0 NJ with 51X11 JN (just received).
However, upon examination of the needles (pics below with slots aligned), I think the new NJ/JN is going to change everything in a major way. The length difference concerns me. The stock 5HX12 is in the middle, the “7F6” to the right and the 51X11 on the left. Their length measures:
5HX12 – 53.41
7F6 – 57.38
51X11 – 51.38
The stock and Dyno needles are designed to run the original 3mm nylon spacer under the clip. I cannot find any info. whether the 51X11 uses that spacer (?). If it does not, then what about the hole left in the slide?
I think the proper move is to is to install that set-up AND drop the main back to perhaps a 135-137.5. The Canadian set-up is going to be way rich! ??
It appears to me that the Dyno Tune “Stage 3” kit relies on an oversize main, then compensates with a really lean (large) needle to get mid-range correct. Perhaps that was done to keep kit costs down and use the stock NJ.
Another alternative is to tune on my “lollipop” baffle (now full open) to attempt to send back more sound to exhaust port and affect the WOT miss.
I’m hoping someone has experienced switching between a “Dyno” set-up and a “Canadian” set-up to save some garage time.