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Wiseco kit owners, how long does it take to break in the pistons/rings?

  • Thread starter Thread starter koolaid_kid
  • Start date Start date
K

koolaid_kid

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I just got my GPz back on the road. It has an 810cc bore kit in it. How long does it take to break them in? I realize it should be measured in time, but I have only miles as a measurement device.
I file fit the rings and assembled the engine myself. All other work was professionally done. I am tuning it myself using my wideband, but don't want to do any WOT runs until the rings are sufficiently broken in.
Thanks in advance.
 
What works for me is:
About 50 miles of loading/ unloading piston rings (up and down short hills at 45-50 mph) 2-4,500 rpm. Oil and filter change.
About 150-250 miles mostly cruising while varying rpm's between 2,500 and 6,000 with 50% loading/unloading rings. Oil and filter change.
500 miles of normal-type riding with some bursts to 8,500-9,000. Oil and filter change.

Done. ;)

Fill with your favorite synthetic oil and enjoy!

Other opinions/techniques are sure to come...


Daniel
 
On my latest rebuild the bike was ran around town using liberal throttle for about 20 miles or so, followed by retorquing the head gasket and checking the valve clearances. After this I started doing freeway roll-ons using more and more throttle. Started with fifth gear then forth and eventually 3rd gear pulls to redline by the time the engine had crossed the 75 mile mark. Engine is running great without a hint of oil useage.:)
 
I agree with first response as well as the fact that you want to vary the throttle as much as possible during the last 500 miles without being to hard on it.

Thats the same procedure my mechanic had me do when I did my break in.
 
after 6000 trouble free miles. If you read it then you would have noticed that it was caused by something else.

Ergo the on the advice of my mechanic.

Not to mention that during regular riding before I had problems I would regularly take it to redline and ride it hard.

He is asking about break in. Which worked. I gave my 0.02 you want to discredit them then fine.
 
Dizzixx said:
after 6000 trouble free miles. If you read it then you would have noticed that it was caused by something else.

Ergo the on the advice of my mechanic.

Not to mention that during regular riding before I had problems I would regularly take it to redline and ride it hard.

He is asking about break in. Which worked. I gave my 0.02 you want to discredit them then fine.
Click to expand...

Geeze man chill. In your other thread you are going on and on about how the rings are bad and the engine is burning oil. I've been watching your thread closely and so far there is no mention of "caused by something else".
 
Yeah, he didn't circulate the oil or some such ****e.
Sounds to me like he never sealed the rings.
 
Sorry, just frustrated.

Dont want to take away from this thread. I replied to you in mine.
 
As the others have said, don't beat the engine up too much by running it at the red-line but don't be afraid to pull through all your gears and then let the engine do the braking while you downshift through the gears. Doing this at varied speeds should set the rings properly in just a few miles.

I'd still recommend running through at least two tanks of gas before I started to abuse the bike. :)
 
Thanks for all the responses, folk. This is my first high performance 4 stroke 4 cylinder air cooled bike and I just wanted to collect as much data as possible. FWIW, I don't beat on my bikes, but I do ride enthusiastically. All other 4 stroke cars I have owned (including the fully-forged turbo engine I built for the TransAm I broke in easily, per manufacturer's recommendations.
This one I am being careful with (it's been a pricy engine, all things considered) because I want both maximum performance and longetivity. I have decided on the following:
Vary the rpms as much as possible
Don't keep the revs down to specified limits, (5k, then 6k, incrementally up to the limit of 11k) just keep them varied
Don't just nail it while breaking it in, just roll into the throttle until the desired rpms are reached.

I've already done one oil change, and another is scheduled prior to this weekend's Rally.
I'll be tuning the carbs with my LM-1 btw. Should be very interesting, it's my first bike to tune with a wideband.
Again, thanks for all the responses. For those that are watching this thread, the break-in seems to be doing well. All I have done to the carbs (stage 3 jet kit) is drop the needles one notch. It is running surprisingly well for an engine that has not had the carbs tuned at all.
 
tkent02 said:
You forgot one thing, open the throttle! That's what it needs.
Click to expand...
Throttle? Is that the right hand rest, or located somewhere near there? I thought that was the life saver cylinder, since when it rotates counter clockwise the noise increases, and loud bikes save lives (it has a kerker). ;););)
 
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