ninjette.org - View Single Post

DannoXYZ · May 23rd, 2022, 02:30 AM

original resistor is 100 ohms, but doesn't lower voltage enough for some ignitors. Some people have had to use as high as 150 ohms for bike to start.

Same size valves, there are many variables that determine power-output. There's no single component that contributes to entire change.

COMPRESSION
08-12: 11.6:1 pistons
88-07: 12.4:1 pistons
For race-bike, use 13.5:1 pistons with race-petrol +105 RON

EXHAUST
08-12 new-gen models have exhaust header-pipe at least 5mm smaller than pre-gen models. Additonally 2-1 designs optimises mid-range torque and loses high-end flow & power compared to earlier 2-2 exhaust.

Tyga full exhaust has larger diameter header pipe with true 2-1 merge collector along with smoothest transitions to muffler. Tyga full-exhaust gives +22% +6 bhp, better than any other single upgrade! See my exhaust comparison here: https://www.ninjette.org/forums/showthread.php?t=338180

IGNITION
08-12: maximum 35-degrees BTDC @ 4000rpm
95-07: maximum 38-degrees BTDC @ 4500rpm
88-94: maximum 42-degrees BTDC @ 4500rpm

CAMS
08-12: int/exh = duration 225/223 deg, lobe-centre = 102.5/107.5
95-07: int/exh = duration 272 deg, lobe-centre = 110
88-94: int/exh = duration 280 deg, lobe-centre = 110

No, you cannot put earlier pre-gen cams on your new-gen. They are designed for rocker-arms instead of bucket-over-valves. Only aftermarket cams worth using are Beet cams from Japan.

CARBS
08-12: 28mm
88-07: 30mm
86-87: 32mm

There's no secret to making power with these engines. Extremely competent engine-builder & racer have gotten 48whp out of one (close to factory ouput!). You just have to know exact specs by taking apart engines and measuring them. Then knowing which ones to change and by how much.

May 23rd, 2022, 02:30 AM	#54
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	original resistor is 100 ohms, but doesn't lower voltage enough for some ignitors. Some people have had to use as high as 150 ohms for bike to start. Same size valves, there are many variables that determine power-output. There's no single component that contributes to entire change. COMPRESSION 08-12: 11.6:1 pistons 88-07: 12.4:1 pistons For race-bike, use 13.5:1 pistons with race-petrol +105 RON EXHAUST 08-12 new-gen models have exhaust header-pipe at least 5mm smaller than pre-gen models. Additonally 2-1 designs optimises mid-range torque and loses high-end flow & power compared to earlier 2-2 exhaust. Tyga full exhaust has larger diameter header pipe with true 2-1 merge collector along with smoothest transitions to muffler. Tyga full-exhaust gives +22% +6 bhp, better than any other single upgrade! See my exhaust comparison here: https://www.ninjette.org/forums/showthread.php?t=338180 IGNITION 08-12: maximum 35-degrees BTDC @ 4000rpm 95-07: maximum 38-degrees BTDC @ 4500rpm 88-94: maximum 42-degrees BTDC @ 4500rpm CAMS 08-12: int/exh = duration 225/223 deg, lobe-centre = 102.5/107.5 95-07: int/exh = duration 272 deg, lobe-centre = 110 88-94: int/exh = duration 280 deg, lobe-centre = 110 No, you cannot put earlier pre-gen cams on your new-gen. They are designed for rocker-arms instead of bucket-over-valves. Only aftermarket cams worth using are Beet cams from Japan. CARBS 08-12: 28mm 88-07: 30mm 86-87: 32mm There's no secret to making power with these engines. Extremely competent engine-builder & racer have gotten 48whp out of one (close to factory ouput!). You just have to know exact specs by taking apart engines and measuring them. Then knowing which ones to change and by how much.