Oil Flush

[Tonup76]

Switching from regular to synthetic oil.......and yes, it's motorcycle oil not just regular car synthetic (Mobile 1 T4 to be exact).  I'm going to follow the standard oil change procedure, UNLESS someone suggests I flush out the engine.  
IF SO, how do I do that?  A guy told me to put a few drops of kerosene in the oil, let her run, get warm and then drain.  Will that work and is it necessary?


You guys are always so helpful so any advice here would be appreciated.  Thanks.



Oh yeah, my bike is a 1973 cb750f with about 17k on her.  

[vern401]

that will work but word of caution to ya.
1 it will take more than a few drops 1/4 cup will be fine
2 run it ONLY long enough to get the oil flowing through the engine good.
3 let it sit for an hour or so and repeat IDLE only engine run.
4 drain engine and oil tank well, replace oil filter.

kerosene has very little lubricating qualities to it. I have used diesel fuel for this also.

the dlush is to remove the mineral deposites on the engine that regular oil leaves behind. these deposites seem to not react well with synthetic oils. Take note that going from mineral oil to synthetic oil though good in my opinion can have some problems.
1. synthetic oil can and usualy does find places to leak that mineral oil does not.
2. once switched over go through a so called break in period with the bike.... I would do a second oiil and filter change after only 1000 miles or less.
3. if your clutch starts slipping then it is more than likely the oil.

[Re-run]

I got lucky when I did my change to synth. I did nothing. I drained well and put it in and never looked back.
When I drain, I do tank first, then filter, and then pan. After that, since I have a large pan, I leave it under but move it forward some and with the filter housing off, I hit the starter quickly a bit to pump out more oil.

If it is a motorcycle synth, clutch slip should be 0 but it has happened when people didnt get the engine clean and sludge got on the plates and caused slip.

Another option for cleaning is to dump in part of a can of seafoam and idle for a bit.

Vern's 4 steps should work good though.

[Tonup76]

I just wanted to thank you guys for the advice.  I made the change to synth and it's the best thing I think I've ever done with my bike.  It's like a new bike!!!  WOW!!!  

Thanks again.

[vern401]

thats what the forum is for. To help its members keep there bikes in great running shape.
All thats left for you now is to enjoy the ride.