Quote:

Goal:
More torque in the 3000-6000 range. More HP above 6000 would be a bonus but rarely used and is not a primary goal.




Richard, it has already been covered but I would recommend going down one tooth on the front sprocket. Some increase in sportyness at the least expense and work. Doesn't require any motor retuning and can be undone easily.
Now, if you really want to make some improvements the 813 cams will do it. I had the 813 cams & 904 big bore done at the same time so can't say for sure which made the biggest difference where. My dealer (very experienced Triumph folks) said that more cc's would increase torque. Cams would help mid & high RPM's. Stock mine just crawled above 6,000RPM and felt like I was strangling it by 6,500RPM. Rarely got above 5,500RPM because it just didn't gain power. Now it pulls up to the rev limiter. *Now a proper EFI tune is needed to optimize the gains. The shop also indicated that if I did the big bore w/o cams I would likely be back soon for them. Good luck with any changes you make.

09 America, some modifications