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CYLINDER BORING - IRON SLEEVE

 Singles

LC180  Bore and hone with piston purchase $47.50
LC181  Bore and hone with customer's pistons 85.00
LC201D Deglaze cylinder 16.00

CYLINDER BORING - ALUMINUM NIKASIL PLATED

Singles

LC145 Bore and re-nikasil single cylinder - w/Piston purchase 210.00
LC146 Bore and re-nikasil single cylinder - w/customer piston 230.00

Athena Big Bore Cylinders from Bigborethumpers.com are an all new casting specifically for big bores. They are not simply bored out stock size blocks. Athena makes these blocks with larger water jackets and thicker cylinder walls to help with cooling. Athena kits come with new cylinder, piston, rings, pin gaskets. Click here to see the complete line of Athena cylinder kits.


KTM PISTONS...

KTM 250SX-F 2006 - 08
DISPLACEMENT BORE SIZE COMP RATIO PART# MFG CODE NOTES PRICE
250cc 76MM 13:1 247623

Standard Bore - Deglaze 170.88

KTM- 400SX 2000-'02, 400EXC 2000-'02
DISPLACEMENT BORE SIZE COMP RATIO PART# MFG CODE NOTES PRICE
416cc 91MM 12.5:1 4734M09100 2 mm over. Disc.

NEW : KTM- 450SX 2003-'06
DISPLACEMENT BORE SIZE COMP RATIO PART# MFG CODE NOTES PRICE
467cc 97MM 12:1 4805M09700 2 mm over. Disc.
467cc 97MM 13:1 4806M09700 2 mm over. Disc.

450 SX-F 2007 - 09
DISPLACEMENT BORE SIZE COMP RATIO PART# MFG CODE NOTES PRICE
450cc 97MM 12.5:1 260955

Standard Bore - Deglaze 170.88
450cc 97MM 13:1 260956

Standard Bore - Deglaze 170.88

450 XC 2008 Quad
DISPLACEMENT BORE SIZE COMP RATIO PART# MFG CODE NOTES PRICE
450cc 89MM 12.5:1 274221

Standard Bore - Deglaze 185.30
450cc 89MM 13:1 274219

Standard Bore - Deglaze 185.30

KTM- 520 SX/EXC2000-'02, 525 2003-'07
DISPLACEMENT BORE SIZE COMP RATIO PART# MFG CODE NOTES PRICE
532cc 97MM 11:1 4731M09700 2 mm over. 178.50
532cc 97MM 12.5:1 4732M09700 2 mm over. 200.60

525 XC 2008 Quad
DISPLACEMENT BORE SIZE COMP RATIO PART# MFG CODE NOTES PRICE
525cc 95MM 12.5:1 274173

Standard Bore - Deglaze 185.30
525cc 95MM 13:1 274174

Standard Bore - Deglaze 185.30

MORE SOON...