Big Bore Master Price List

This is Forward Motion’s master price list of the biggest selection of big bore kits available by any engine builder in the motorcycle industry. All of these kits include these services and parts.

For 2-stroke engines, the package deals include;

Cleaning and disassembly.
Inspection and measurement.
Over-boring to big bore size.
Porting - You’ll get your choice of powerbands; more low/mid, more mid/top, broader powerband, and choices of fuel; pump or race gas.
Re-plating with nickel silicon-carbide composite plating and Diamond honing.
Head mods; resurfacing, squish and bowl machining, polishing.
Powervalve service with assembly and timing, ready for installation!
WISECO, VERTEX, PRO-X pistons, gasket kits, and top end needle bearing.
Piston check with ring end gapping.
Cylinder bore “break-in finish”, no safety measures needed, just ride!

Backed up by a 1-year warranty on the plating and free updates to the porting and diamond honing.

For 4-stroke engines, the package deals include;
Over-boring.
Plating with Diamond honing.
Piston kit and gaskets.
Piston check with ring end gapping and assembly of the rings.
Cylinder bore “break-in finish”, no safety measures needed, just ride!
Backed up by a 1-year warranty on the plating and free diamond honing.

JAPANESE DIRT BIKES

HONDA
CR80 1986-2004 92,100cc $400
CR85 2005-07 92,100cc $400
CR125 1972-88 134cc $350
CR125 1989-99 134,144cc $450
CR125 2000-04 134cc $450
CR125 2005-07 134,139,144 $500
CR250 1978-2007 265cc $550
CRF150R 165cc $425
CRF250R/X 2004-09 262cc $450
CRF250R/X 270cc 2004-09 CYLINDER WORKS KIT $595
CRF450R/X  2002-08 490cc Athena $795
CRF450R/X 2002-08 478cc $450
CR500 1984-2001 520cc $500

KAWASAKI
KX60 1985-2002 66cc $325
KX65 2000-11  72cc $350
KX80/85 1980-2011 100cc $400
KX80,85,100 1980-2011 107cc $400
KX125 1985-1993 134cc $450
KX125 1994-2012 144cc $500
KX250 1989-2007 265cc $550
KX250 1994-2007 295cc $660
KX500 1985-2001 525cc $660
KDX200 1995-2006 225cc $500
KXF250 262, 270cc 2004-10 $450
KXF450 472cc $450
KXF450 490cc Athena Kits (New cylinder) $750

SUZUKI
RM65 2000-09 72cc $350
RM85 2000-09 100cc $425
RM125 1976-88 134cc $265 (Sleeved cyls)
RM125 1989-2009 144cc $500
RM250 1989-2008 265cc $550
RM250 2003-08 295cc $660
RMZ250 262, 270cc 2004-11 $450
RXZ450 2006-09 472cc $450

YAMAHA
YZ80/85 1993-2012 105cc $425
YZ125 1994-2012 134,144cc,  $500
YZ250 1979-89 265cc $350 (Cast-iron sleeve)
YZ250 1990-2012 265cc $550
YZ250 1999-2012 295cc $660
YZ250F 2001-10 262, 270cc $450
YZ400F 1998-99 420cc $450
YZ426F 2000-02 444cc $450
YZ450F 2003-09 472cc  $450

EUROPEAN DIRT BIKES

HUSQVARNA
CR/WR125 1998-2011 144cc $450
CR250 1998-2009 265cc $550
GASGAS
MX/XC125 2000-2011 144cc $500
KTM
We can repair KTM 2-stroke cylinders to original but there’s no larger pistons than 1-2mm
TM
MX125 1998-2007 144cc $500
MX250 1998-2011 265cc $550  

HOW TO GET STARTED

Just CLICK & PRINT a copy of the Service Order Form and follow the directions on packaging your parts for shipping. All the options are listed for services, powerband choices, fuel types, spare parts, shipping methods, and payment options. Click here for the service order form

ALL INTERNATIONAL ORDERS GET OUR RUSH SERVICE FOR FREE!