Best guess is the machinist took .060" off the piston edges so compression loss will be negligible. File this issue under Oops and forget about it.
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The "Not a Project" CB450DX (project log + pics)
- Thread starter CB450DX
- Start date
CB450DX
Veteran Member
Gave up on this.
Read in multiple places people just dismissing it as snake oil or whatever. And I do agree that early oil changes can probably accomplish the same thing.
All the last 4 or 5 (I don't even know anymore) oil changes were done super early, between 800~1500km so I think the engine probably does not need a flush. Especially since I changed it from mineral to brazilian semi synthetic (motul 5000+ locally produced with recycled oil) and now motul 5100 (imported) semi syntetic. Just going to put new Motul 5100 15w50 on it and that is it.
Just bought the motul Clean & Boost for the gas as well. I already run premium 103 octane so it should be fun (I run 103 mostly because it has a smidge less ethanol on it, but I did run it on E30 just fine).
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CB450DX
Veteran Member
I would worry about it, but I already hit 160+kph (100 mph) multiple times before even finding out with absolutely no issues so it's clearly fine and happy hehe. Love to hear the exhaust crackling after I park the bike.
Back in the day, a few techs I worked with used a pint of ATF in the engine oil a day before an oil change (car engines though). Just read some posts at Bob is the oil guy and apparently there are better products to use for it these days, though even those products might be problematic for a wet clutch...
CB450DX
Veteran Member
There was a period of time when I was still early researching and learning about oils that I fell hard into the liqui-moly additives and teflon and ptfe and whatnot rabbit-hole. Seemed like a good idea.
Well, it was a terrible idea for multiple reasons, one of which is the fact that Liqui-Moly has no official representation over here it seems (or its a weak one) so their stuff is RIDICULOUSLY expensive.
More than double the price of Motul 300v for an additive, and triple the price for a freaking oil - 300v is my gold standard of oil ever since I saw a guy blow a hole into a CRF300F bottom end running over a crashed bike on a motocross course and not only still do multiple laps with basically no oil, but he won the race and the championship, and, as is tradition, he revved the hell out of the bike until it died - Terrible to watch, but the fact that he had to rev it for quite a long time is more reason for me to like that oil. One day the CB shall drink (or burn) such expensive liquor.
Back then I believe the Motor Oil Geek channel had just put out a video on oil additives, and then another video about how how engines have all these things that are hydraulically actuated and the additives/etc really did not help with the concentration of smudge in these things, some in fact made it worse [plus a lot of interesting info about how early oil changes at the start of an engine's life are even more important nowadays].
It also reminded me of the Honda VTEC guys talking about how some engines that were only run on low RPM and would not use VTEC would get stuck VTEC valves that could be sometimes fixed by the good ol' italian tune up of just revving the hell out of an engine for a bit to get the valves unstuck. There's some videos of people just revving some terrible sounding honda engines and then out of a sudden the terrible sounds stop and the engine just runs absurdly nice.
Never looked back on oil additives since, even if my bike has zero hydraulics
It's funny because over here brands like STP/Bardahl still have a huge following for their additives, mostly older people who have been using them for decades.
Well, I put the "boost and clean" additive in the tank. Smelled like kerosene pretty much. Ingredients say "light solvents and selected additives" so pretty much what I expected.
Did not notice a thing riding, but let's see on the next few cold starts. The bike has started needing quite a few seconds spinning to wake up. Once it wakes up it wakes up exactly as usual though, so I'm not too worried.
Well, it was a terrible idea for multiple reasons, one of which is the fact that Liqui-Moly has no official representation over here it seems (or its a weak one) so their stuff is RIDICULOUSLY expensive.
More than double the price of Motul 300v for an additive, and triple the price for a freaking oil - 300v is my gold standard of oil ever since I saw a guy blow a hole into a CRF300F bottom end running over a crashed bike on a motocross course and not only still do multiple laps with basically no oil, but he won the race and the championship, and, as is tradition, he revved the hell out of the bike until it died - Terrible to watch, but the fact that he had to rev it for quite a long time is more reason for me to like that oil. One day the CB shall drink (or burn) such expensive liquor.
Back then I believe the Motor Oil Geek channel had just put out a video on oil additives, and then another video about how how engines have all these things that are hydraulically actuated and the additives/etc really did not help with the concentration of smudge in these things, some in fact made it worse [plus a lot of interesting info about how early oil changes at the start of an engine's life are even more important nowadays].
It also reminded me of the Honda VTEC guys talking about how some engines that were only run on low RPM and would not use VTEC would get stuck VTEC valves that could be sometimes fixed by the good ol' italian tune up of just revving the hell out of an engine for a bit to get the valves unstuck. There's some videos of people just revving some terrible sounding honda engines and then out of a sudden the terrible sounds stop and the engine just runs absurdly nice.
Never looked back on oil additives since, even if my bike has zero hydraulics
It's funny because over here brands like STP/Bardahl still have a huge following for their additives, mostly older people who have been using them for decades.
Well, I put the "boost and clean" additive in the tank. Smelled like kerosene pretty much. Ingredients say "light solvents and selected additives" so pretty much what I expected.
Did not notice a thing riding, but let's see on the next few cold starts. The bike has started needing quite a few seconds spinning to wake up. Once it wakes up it wakes up exactly as usual though, so I'm not too worried.