Engine mods..... (Motor of Death I) 102.03 HP 76.21 TQ
1. big bore 1123cc high compression Pistal pistons at 11 to 1
2. ported heads
3. oversized intake valves
4. DP cams & cams ECU
5. ceramic coated pistons (top) & combustion chambers
6. PC9 slick piston skirt coating
7. heat dissipating outer coating (black)
8. Febur oversized oil cooler
9. opened up stock airbox with BMC filter
10. large tube header with Leo Vince slip-ons
11. lightened stock flywheel (2lbs)
Motor of Death I died (crank bearings failed) I had to rebuild her
Engine Mods....(Motor of Death II) 106.57 HP 78.91 TQ
same as MOD I above but with....
1. ceramic crank bearings
2. lightened/balanced/polished crankshaft (848 style)
3. Carillo connecting rods
All dyno runs were done on the same Dynojet dyno, same operator,
same gearing, all runs were done in the industry standard 4th gear
if the dyno pull is performed in 5th gear, the HP will read aprox 5% higher.
I don't know why the overseas dynos seem to read higher TQ numbers, my numbers are in line with the USA dynos.
The actual numbers don't really matter, (except for bragging rights

)
what is important is the increase over stock, which for me was a 30% increase in HP & 10% in TQ
My next round of mods will be the intake system (V stacks) & a dyno mapping using a PCV, I'm hopping to get into the 112 HP range
My guess is that 115 HP is the max HP range of this style of motor and still be ridable.
I just went to a 520 chain kit with a 15/43 gearing which works for me as I can now hit redline in 6th gear

a larger rear sprocket is better than a smaller counter shaft sprocket in terms of chain strength. Aloha Alex