650 Central also have a 145mm long rod kit.  JCEN11-1000. Not yet listed either.

$800 for rods and pistons. In stock.

Will later be offering a kit with sleeves or fitted to a ‘big-fin’ cylinder.

 

Wossner pistons for long rod kit

 

 

Wossner piston

 

 

Wossner piston

 

 

long rod kit

 

Mike “Mercury” Morse writes further …

Piston/ ring/wrist pin package is 11 grams lighter than a stock 650. They are sized at 79.99mm, to allow for potential honing of existing cylinders. Reduced headland for more power and better emissions, allowed by a truly complimentary squish band. (A true 10.5:1 is achieved)( to be verified). Modern ring package has 1mm top and 1.2mm 2^nd ring, with a 2mm 3 piece oil ring. Connecting rod is 145mm c-c, achieving a 1.96:1 rod/stroke ratio, moving the torque peak up in the power band, smoothing the short rod’s explosive midrange, increasing traction and peak power. Small end is bushed with premium C630 aluminum bronze and has 10% more area. Big end bearing has 3.5mm rollers for less skating at high speed.

650 Central … Mike “Mercury” Morse …

“To race is to live—all the rest is just waiting”

Note: … 3 standard types of XS650 motors

• 256 … 136mm rods … XS1-TX650
• 447 … 130mm rods … TX650A on non-european models
• 533 … 140mm rods … XS650B on european models

 

256 – 447 – 533 rods … from skull

650 Central has started producing a sump extension kit. MCEN40-2750. You wont find it listed yet.  A serious performance modification. 2 3/4″ deep (69.85mm).
Lowers the oil level freeing up the flywheels and clutch basket. Less flywheel drag implies better dyno numbers and lower oil temps.

Kit price … $135.

• extension-(cast for better heat dissipation),
• SS bolts
• 2 gaskets

 

 oil sump kit

 

Hattip Alvin.

650 Central … Mike “Mercury” Morse …

“To race is to live—all the rest is just waiting”