I just had a dyno-tune performed on my "new" bike after the break-in period following a 904 BB (it was a 790cc). This was at a Triumph dealer. I asked the service manager if this included balancing the carbs and she said "of course". After it was all said and done (the guy doing the runs seemed to know his stuff, and spent a long time analyzing and tweaking with the sniffer in each exhaust) I ended up with:

Left Carb:
- 155 Main, 42 pilot, 2 shims

Right Carb:
- 150 Main, 42 pilot, 1 shim

In the notes he remarked that airflow was different from left to right.

I had a chance to talk to him and asked about this difference and remarked that I thought that the carb balance screw would remedy this. He said not really and showed me the different charts he ran and this and that. I was short on time so I didn't get into it, plus I knew he was consulting the the other mechanic who I know is Triumph and Ducati factory trained and works on race bikes and such while he was making these decisions.

Has anyone else heard of this? I don't remember reading where anyone else had different jets on their carbs.

BTW, my bike is running awesome. I went from 56 hp and 43 ft/lbs torque running long TORS and airbox eliminated pre-big-bore, to 70 hp and 53 ft/lbs torque with Specialty Spare Long slash-cuts.

Here's my dyno-run chart showing the old run and new ones:
[image]http://i89.photobucket.com/albums/k214/airbuspete/TBA/dynorun.jpg[/image]
Here's a lame cell-phone video of one the runs - taken from outside the room looking through a window:
[image]http://s89.photobucket.com/albums/k214/airbuspete/TBA/?action=view&current=0428091230a.flv[/image]

I thought I knew how to embed the photo and video but I guess not...You can see them if you click my name and check out my photobucket.

Last edited by Pete777; 04/29/2009 6:43 PM.