This is an idea I have had in my head for a while and it recently became apparent that the original Sport Port Templates by Racelogic, are no longer available. In an effort to fill the gap left by this I have created a similar product. I did not want anything to do with plagiarizing Racelogic's product and started this from scratch, drafted in CAD. I measured existing cylinders to get my starting point, have researched, collected information and utilized various different ported cylinders I have owned and ridden and have created an exhaust port shape that I believe is well suited to a freeride/freestyle application, promotes reasonable ring life and is relatively simple for the at-home DIY enthusiast to replicate with simple tools.
My templates are printed on a magnetic sheet that slides into your cylinder and aligns with the top and bottom of the sleeve to easily locate and mark the areas to be modified. These include a revised exhaust port template that widens and reshapes the sides of the port and a bottom of sleeve template that modifies the intake side to allow for better flow into the transfers. The templates also include an instruction sheet spelling out the process from start to finish.
As it currently sits I have a template for Yamaha twin and triple cylinders, one for 77mm-80.5mm (6M6/650 cylinder) and one for 81mm-85mm (701 61x/62t and 760 64x cylinder).
In an effort to keep this a truly budget friendly option, I will be selling the templates for $25 shipped in the US and most of Canada.
I am not a master engine builder/two stroke guru, I am just a guy who has taken the time to do some research, ride and examine multiple ported engines, test some different porting and do some simple math.
Will this be the best, most high performance port job you can possibly get? No, you should pay an engine builder for that.
Will this offer a great performance boost with relatively little investment in time or money? Absolutely.
If you are not happy with the product upon arrival, put it back in the envelope, ship it back to me and I will refund your entire payment.
**UDPATE - I have since stopped selling these templates, instead they are free. Get the PDF here. **
My templates are printed on a magnetic sheet that slides into your cylinder and aligns with the top and bottom of the sleeve to easily locate and mark the areas to be modified. These include a revised exhaust port template that widens and reshapes the sides of the port and a bottom of sleeve template that modifies the intake side to allow for better flow into the transfers. The templates also include an instruction sheet spelling out the process from start to finish.
As it currently sits I have a template for Yamaha twin and triple cylinders, one for 77mm-80.5mm (6M6/650 cylinder) and one for 81mm-85mm (701 61x/62t and 760 64x cylinder).
In an effort to keep this a truly budget friendly option, I will be selling the templates for $25 shipped in the US and most of Canada.
I am not a master engine builder/two stroke guru, I am just a guy who has taken the time to do some research, ride and examine multiple ported engines, test some different porting and do some simple math.
Will this be the best, most high performance port job you can possibly get? No, you should pay an engine builder for that.
Will this offer a great performance boost with relatively little investment in time or money? Absolutely.
If you are not happy with the product upon arrival, put it back in the envelope, ship it back to me and I will refund your entire payment.
**UDPATE - I have since stopped selling these templates, instead they are free. Get the PDF here. **
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