Just spent a bundle on my 86 Quadracer...
Piston,Rings, Bore,Gaskets...
I've Never broke in a New motor...I just break em...(hopefully not again)
Whats the best proceedure to enjoy the new found compression and power without killing it b4 its time?

Also...
how do you get the rear shock rebuilt(recharged)

Thanx!

 

I just went thru the same exact thing. I had never broken in a rebuilt engine, but the procedure i did seemed to work just fine. I got all the advice from just reading forums like this and compiled all the info into my own procedure. I also have an 86 Quadracer and just bored it to .060 over. First of all, what kind of piston did you install? If it's a Wiseco, or a forged piston, the procedure takes a little longer because a forged piston needs more heat cycles to seat the rings properly. If you didn't install a forged piston then you can just cut out the last cycle in each step. Here we go:

It is very imperative that you let the engine cool completely in between each cycle. This is what seats your rings properly. The more heat cycles, the better. Print this out, because you won't be able to remember every step and check them off as you go. DO NOT skip a step because each one is in succession to the next. Fill your tank with a fuel/oil mixture of 24:1. This is the factory recommendation for the LT250R. After one full tank of this mixture, you can go back with your original mixture. I prefer 32:1 in my Racer.
***PRINT THIS OUT***

First of all, start the bike up and let it just idle for a few minutes, this is to insure that you have no leaks. Shut it down and let it cool completely to touch. Do this step twice more, letting it cool in between completely.

Next start it up, let it idle 10 minutes, blipping the throttle slightly...Don't over rev past 1/4 throttle. Shut it down and let it cool completely to touch. Do this step twice more...letting it cool in between.

Now start the bike up, let it run 15 minutes, blip the throttle up to 1/2 throttle. Shut down and cool completely. Do this step twice more, letting it cool in between.
Ok, now repeat the above step, but increase your throttle to 3/4.

Now comes the easy and fun part:
Start up your bike, let it get to operating temp first, then ride it around for about 10 minutes without going past 1/2 throttle. Be sure to go thru all the gears, but don't over rev, and don't let the throttle stay at a constant speed for more than a few seconds..Keep blipping it...I fried a brand new set of rings my first time around doing this. After 10 minutes, shut it down and once again let it COMPLETELY cool down. Do this step once more...Let it cool.

Ok, now..isn't this fun? I know all this sounds repetitive, but it's imperative, especially with a forged piston and new rings. Do the above step once again but increase your run time to 15 minutes, and increase your throttle to 3/4. Go thru all the gears, don't over rev. Let cool and repeat.

Now it's time to see if the real power is there! Start bike, let it warm up, ride for 15 minutes, go thru all the gears with short burst to full throttle. DO NOT..DO NOT..DO NOT hold at full throttle for more than a second or two. Shut down after 15 minutes and let it cool. Do this step once more...Let it cool! Was the power there?

And last of all...you didn't think this was ever gonna end did you? Well, one final step is to ride it hard for about 10 minutes, with short bursts to full throttle in every gear. Shut it down and let it cool completely. Do this step one final time but increase your time to 15 minutes and run it hard thru all gears. Like you're running from the cops...LOL! This final heat cycle will allow it to get really nice and hot. Let it cool completely before riding again!

Well that's about it, you now have a nicely broken in engine that hopefully has lots of power! If your still precautious about burning anything up, just take it easy for a couple tank fulls and you should be fine. That's what I did, and mine runs great...Lots and lots of compression still..about 140 psi to be exact. Hope this helps and let me know how she runs! Good luck! If you have any questions, let me know. I'll be glad to help.