Main Motorcycle: 2017 Bonneville T120
Join Date: Nov 2017
Location: Burlington, WI
Thruxton 1200 to Bonneville T120 ECU Swap and TuneECU
I'll summarize the whole event but i just wanted to share an experience with the community. Because the engines between the Thruxton 1200 and the T120 are nearly identical, we installed a Thruxton 1200 ECU to a T120 just to see if it would work. Differences being the Thruxton has a lighter crank and 11:1 CR instead of T120s 10:1 CR.
It took us swapping out the ECU, instrument cluster, and ABS module before the ECU was happy. It was very hard to start and once it did start, it idled at 3000 rpm and ran poorly.
I was hoping to pick up 10-15 hp +/- from the more aggressive tune but it was a failure. This was attempted on a stock T120 with Vance and Hines slip-ons.
Other than the compression ratio and lighter crank, I'm not aware of any other mechanical changes between the Thruxton and T120 engine. The air box and exhaust are different, but I believe the bike would still start and at least idle some what decently. I must be missing some other difference.
All of this may be a moot point as TuneECU has listed the Bobber 1200 as a bike that can be remapped. Is the T120 in the works for mapping ability?