cb125 rebuild

[mattish]

Hi everyone,

As Im sure you know Ive just finished rebuilding my cb125 and starting to run it in.

Just for reference I have changed the rings and the valve stem oil seals.

Today I decided to check the engine oil level and its gone down a fair bit, I estimate its probably burnt/lost around half on the dipstick in around 40-50miles. Does the engine burn oil while wearing the rings in?, or have I still got a problem somewhere

It doesnt look anywhere near as smokey as It used to which I guess is good.

Thanks for your time

[stinkwheel]

Yeah, it'll probably burn a fair bit of oil until the rings are bedded in and have sealed themselves properly. I presume you honed the barrels before fitting the new rings. If you didn't, the rings will take a fair bit longer to bed in to the exact profile of the barrel.

Remember, you've had the top-end off too. A fair proportion of your first fill of oil will have been pumped up there and will be lurking about in the rocker area and oilways.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[mattish]

Thanks for the prompt reply stinkwheel, the barrels were indeed rehoned. I have topped it up and plan to go out for a ride over the weekend

[SilvaRizla]

After about 50 miles you should see a vast improvement and then at the 100 mark it should all be normal, just make sure there are no leaks and you'll be sound
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I'm Ivan Dobski the Meatsafe Murderer only I never done it, I only said that I done it so they'd take the truncheon out of my bottom