What you need: A dremal, and a right angle for the dremel, you can get one at lows or home depot. I can get away with only 1 bit for this job. If you dont have one already just send it in to get it ported, this is only for people who like messing with sh*t and are willing to take the risk doing this, like me.
Specs for a fairly aggresive port job but nothing crazy: Widen main transfers 2mm, Widen Rear transfers 2mm. Widen exhaust port 1.5mm each side for a totall of 3mm. Raise exhaust Port 1mm. Raise intake 3mm. Clean up transfer tunnels by making the flat edges round and smooth, make the intake bridge round, instead of flat. Use a permanent marker to mark the cylinder inside so you know how much to cut. After your done, you must chamfer the ports, get rid of the sharp edges by using the dremal at a 45 degree angle lightly, then use sand paper on the edges till smooth. The right angle tool on your basic dremal will barely fit when you do the transfers, but it works, if you think you can do this than take your time and good luck. this WILL give you more power when done right, widening the ports give more power, the only timing change is raisng the exhaust port 1mm.
widening the transfers give you low to mid power, raising the ports give more mid to top, raise them too much and you have a fast bike, but all top end.
Pics of the porting and dremal will come as project progresses, i will use slightly different specs for my build, but the ones i gave work great for an all arounder. also a digital caliper will be handy, so you know how much to mark it up.
you will ask, why not just send it out, its not worth it etc etc. #1 because i can its my choice, and i dont recomend you do this if you cant. #2 It feels good having a fast blaster that i can say i built. Any non believers please dont comment. It will take a bit, but once its done ill post up vids of the blasty running, might even post a vid of it racing a stock raptor 660 in the future.
Option: Get a 1mm base plate spacer and run two gaskets(thin paper ones), and get your cylinder deck milled 1mm to make up for the raised jug.
Specs for a fairly aggresive port job but nothing crazy: Widen main transfers 2mm, Widen Rear transfers 2mm. Widen exhaust port 1.5mm each side for a totall of 3mm. Raise exhaust Port 1mm. Raise intake 3mm. Clean up transfer tunnels by making the flat edges round and smooth, make the intake bridge round, instead of flat. Use a permanent marker to mark the cylinder inside so you know how much to cut. After your done, you must chamfer the ports, get rid of the sharp edges by using the dremal at a 45 degree angle lightly, then use sand paper on the edges till smooth. The right angle tool on your basic dremal will barely fit when you do the transfers, but it works, if you think you can do this than take your time and good luck. this WILL give you more power when done right, widening the ports give more power, the only timing change is raisng the exhaust port 1mm.
widening the transfers give you low to mid power, raising the ports give more mid to top, raise them too much and you have a fast bike, but all top end.
Pics of the porting and dremal will come as project progresses, i will use slightly different specs for my build, but the ones i gave work great for an all arounder. also a digital caliper will be handy, so you know how much to mark it up.
you will ask, why not just send it out, its not worth it etc etc. #1 because i can its my choice, and i dont recomend you do this if you cant. #2 It feels good having a fast blaster that i can say i built. Any non believers please dont comment. It will take a bit, but once its done ill post up vids of the blasty running, might even post a vid of it racing a stock raptor 660 in the future.
Option: Get a 1mm base plate spacer and run two gaskets(thin paper ones), and get your cylinder deck milled 1mm to make up for the raised jug.
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