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Canadian Daves JustKDX
Tech help - KDX 200 cylinder Boring
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[QUOTE="motopsycho87, post: 1421628, member: 121282"] 1stly with JulienD's post, though what he says is true, it is virtually impossible to match the stock porting, you can still improve on stock porting, once again, seek A Graham Bell's book for advice on that! A lot can be done with a £15 rotary tool set :nod: . 2ndly, take the barrell off and look at it, that is your best option, normally it is down to clearence to oilways (transfers on 2t) and coolant ways to determine overbore. I would say it is just wiseco's opinion, if they can supply something and get people to buy it they will. I doubt anyone on this forum is going to go into the proper engineering aspects of an overbore, where you need to find the forces being applied to the aluminium cylinder, the amount of heat, the aluminium's heat dissipation properties blah blah blah blah. Basically, if it looks safe, go ahead, trial and error is the way forward :D! If you overbore 2mm you will need to tickle your ports up a little, as all ports should have a gentle radius flaring into the cylinder, but once again, a cheap rotary tool and you can work wonders, once you start cleaning up ports and flowing things a bit you'll be amazed how much material you want to remove! It's a 2 stroke, have some fun with it! No matter what you do you are going to make it less reliable, just make sure it is jetted to suit and that you are running a decent ratio of oil (so many tests indicate roughly 16:1 has performed best in race situations!). [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Tech help - KDX 200 cylinder Boring
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