Street Fighter
The M8 Street Fighter kit is for the customer wanting to go to a larger cubic engine and do an upgrade refurbish to the heads. The heads will get new guides, +1mm intake and +1mm exhaust valves and a performance valve job. These kits feature our 4.280 bore cylinder kits with our custom liners, made from 110,000 PSI ductile iron. These are made longer to support the piston at the bottom of the stroke. Also supplied are the new T-Man Premium High Lift Spring Kit, our custom made, fully coated Wiseco pistons with 3mm oil ring and top of the line Total Seal Rings. Pair this kit with one of our performance cams for big power and torque on a well mannered touring bike.
$3,642.88
*Price does not include NC Sales Tax or shipping
Pro Street Touring
These kits feature our 4.280 bore cylinder kits with our custom liners, made from 110,000 PSI ductile iron. These are made longer to support the piston at the bottom of the stroke. Also supplied are the T-Man Premium High Lift Spring Kit, our custom made, fully coated Wiseco pistons with 3mm oil ring and top of the line Total Seal Rings. The head has our proprietary CNC port work with oversized intake and exhaust valves. Intake and exhaust seats are removed and re-machined for oversize seats to ensure stability. This kit will take a 107″ to a 127″ and a 114″/117″ to a 130″ without any crankcase modifications. With this, you will also have your choice of T-Man cam, which will be determined by the power and torque desired and, more importantly, your riding style.
For more information on your build, you can contact us with any questions you have. We recommend you view our videos on our cylinder liners and our external breather kit. Also, be sure to take a look at our Oil Tank Vent Line Kit (a must-have on all big bore motors).
$4,229.92
*Price does not include NC Sales Tax or shipping
139" Pro Street 4x2
Introducing our Big Cubic inch, big power touring package. The 139” motor comes standard with our custom lined cylinders that feature longer bezel to keep piston rock down and keep the piston much more stable in the cylinder. The Pro Street 4×2 head is fully CNC ported with all new intake and exhaust seats, new guides, +4mm intake valves , +2mm exhaust valves and our Premium High Lift Springs. Pair this kit with one of our performance touring cams and see huge torque and horsepower that jumps right up and carries all the way through the RPM’s. This kit is perfect for the customer looking for big cubic inch power on a motor that can still be a legitimate pump gas touring bike.
This build does require a full bottom end service. Below you will find a spec sheet for the top end only and one for the top and bottom end service. If you would like more information on our M8 Bottom End Service, click here for more information.
*Price does not include NC Sales tax or shipping
Top End Service Only
$4,746.24
Top and Bottom End Service