How hot to heat engine
 

Hello, how hot can I heat the 2006 engine cases in the oven to install my bearings?
On my first case I did 80 Celcius and bearings in freezer but it did not go smooth. I used the hammer quite a bit, but there is no play luckily.
On the second case, I plan on using a spray to freeze so it gets even cooler. How hot can I heat the case though?

i would think you can go much higher than that safely. a quick google shows 130deg C to be safe and other mentions of up to 150

That is strange. At that temperature the bearings normally drop in easily.

Ok this or next week, I will try around 120-130 degrees Celcius. I am also going to put bearings in over night in the freezer. Hopefully it goes smoother.

I normally do mine at 200F for half hour and I let the bearings sit in the freezer (in a zip lock bag) overnight. Seems to always work for me. I also freeze my crank the same way and everything just drops in place.

I used 120 C last time. Didn't freeze the bearings. The old bearings just dropped out, the new ones dropped in. No hammering needed.

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Will try, thanks

Well, I have to admit that my memory isn't always correct.
I found a video I posted on my instagram channel when I replaced the bearings. I actualluy used a small hammer and a drift, but no serious force was needed.

https://www.instagram.com/p/CLFfP6JBHN6/?next=%2F

Im gonna heat the cases to around 140C. I am also going to freeze the bearings and also use freeze spray. Maybe it falls in, maybe not. If it doesnt, hammer and a socket or something like that and a small love tap and it should fall in.

Dont want to start another thread, so I might aswell just ask it here.
The 125cc is unrestricted, but many is restricted for road legal use. Many just derestrict it after inspection. What is the difference in lifetime do yall recon? The piston unrestricted should be able to go 100h+ if not driven its ass off i believe. What about when its restricted?