OK, here it is...
First, you need to get a X back harness. That site I gave you makes completly custom harnesses. Way better then buying by just weight, or even "standard" measurements. There is instuctions on there on how to meassure. Since this is the busy season, it might take awhile to make. (Been waiting nearly 3 weeks for new harnesses and collars...I'm getting quite impatient...) You'll also need a skijor line. This has a bungee built in, so the jerks will be absorbed. A 8 foot one should be perfectly fine. I use a 12 foot one, but I like to have the extra clearance, mainly for gravel being kicked up by the dogs, and it gives extra space in case of a sudden stop at high speeds. (We're usually going between 15-20 MPH) If you are running on a hard surface (pavement, gravel, etc), booties are also a good iea. Fleece ones will work fine.
Now, once you have all of your equipment, its time to get him use to everything. Key here is to make it FUN! Also, dont make training sessions more then 15-20 mins. You first want him to get use to the harness. Put it on, talk to him in happy tones. (Want him to be calm, yet excited) Let him run around in it for some time, just to get the feel of it.
Once he is use to this, its time to start getting him use to pulling. As you probably know, this comes quite natural, so it souldnt be too hard. To start off, attach the skijor line to the harness loop, and attach a milk jug with a few rocks in it to the skijor line. You want it less then 5 pounds. The rocks are really, just for noise. Then, attach a leash to his collar, and say "Hike!" in a short, sharp, happy tone, and start running. He should follow you. Go a short distance, stop and say "Whoa", in more of a slow, low tone. He should always be pulling, and if he looks bored, tired, etc, stop. The skijor line should always be tight.
Praise lots!!!
Once he is comfortable doing this, and is starting get know Hike and Whoa, you can complicate things a bit more. You will need to find a place with turns. A city block will work great. You should also bump the weight up to about 10-15 pounds. A small log or a very small tire will be fine. (Put a eyebolt into it, so you have a place to attach the line). Say Hike and run as usually, but this time, stay a bit behind him. Make sure his head is infront of you. Say Whoa, and stop. Keep repeating, slowing working your way back, until his is always infront of you.
Praise lots!!!!
Once he is comfortable running infront of you, its time to introduce turns. Start as usuall, and when you come to turn, move up next to him, so you are even with about his collar, (but dont slow him down), and depending on the turn say either "Gee" (right) or "Haw" (left), guide him around the turn with the leash. Now, you can either mix it up, and teach both Gee and Haw, or have him learn one compleatly first, then the next. Its up to you, and whatever one you think will work best. (I teach both at the same time). Make sure not to take the same path more then 2 or so times in a row. Mix this up a bit.
Praise lots!!!!!
Now that he is learning his turns, move back behind him. See if he will take it without your guidance. If he is hesistats a bit, guide him around again, and keep working on it. It may take some time.
Bump up the weight again to 15-20 pounds. A larger log, or larger tire is fine. A dumbell would probably work too I suppose. Now it is time to work on "On By". Start off as usuall, and come to a turn, instead of letting go around it, guide him pass it, and say "On by". Take the next turn. Mix up your "On bys" and turns. Also, it will help if you have someone have another dog on a leash, and have then stand near where you plan on running. Come up to them, and as you get ready to pass, say On By, and guide him past. Learning to go past other animals is a great thing to know. Probably one of the most important.
Bump up the weight to 20-25 pounds, and keep working on everthing. Once this begins to become easy, bump it up to 25-30 pounds. Keep working on everyhing, and once that is easy, its time for the bike.
Praise lots!!!!!
Since his is use to being next to the bike, that is a good thing. Problem is, he is use to being next to the bike, and it may confuse him on what he is suppose to do. Another person might help. For the first few bike runs, it is best to find a easy, straight path.
Also, it might be tricky to hook the skijor line to the bike. Personally, I loop mine around the handlebar stem, right below them. Some people prefer to loop it around closer to the tire. Both have pros and cons. Hook it higher, it has less chance of tangleing, but the center of gravity is higher, and you have less control. Lower, easier to tangle, but easier to control. You'll find what works best for you. Anyway, hook up the line, and hook him up. Get on the bike, and tell him Hike. If he is unsure, either start peddling a bit, or get another person. Have the other person run when you say Hike. When he starts running, start peddleing. Enough that he isnt pulling your entire weight, but not so much that the line is loose. Have him pass the other person, and go for about 1/2 mile. This can be a bit nerve-wracking. It can be scary at times. Keep calm, and dont let him sense your scared. That will make it worse. Act like you know what your doing, and are in control. (Well, dont act in control, be in control.)
Praise lots!!!!
Slowly increase the distance, speed, and slowly decrease how much to pedel.
A couple things to keep in mind- watch the temp and humidity. I dont run my dogs over 60º, and about 60% humidity. After the sun goes down, or before is comes up are best. Make sure though, if you run in low light, you have reflective tape on both you, and the dog's harness, and you are wearing bright colors. You can run in warmer temps, but dont have him pull you all the time, keep it slow, and make sure he is hydrated. Give him water about 3 or so hours before you run. (I use chicken broth to make it tasty.) You want him to drink about 2 or so cups.
Most importantly, make it fun, make it exciting.
If you have anymore questions, please ask!!!