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Post by aerologic on Oct 17, 2009 13:17:16 GMT -5
I have some smoke at startup. It goes away fairly quickly. My compression is pretty good, 118 or so. Is this normal? It has always done this and I do believe it is more blue than white.
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shep
1st Gear
Posts: 93
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Post by shep on Oct 18, 2009 10:07:50 GMT -5
Seems be be the nature of the rotary. My bike and cars all do it. As long as your carbs not flooded, I think you're fine. Its supposed to burn oil, so smoke is inevitable. As long as its not excessive, your fine.
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Post by ziggystardust on Oct 18, 2009 14:49:41 GMT -5
Got to agree with shep, my A model runs really well and has the same start up smoke, clears in no time.
If I stop for a few minutes when the engine is hot and re start with the throttle slightly open it will blast some smoke from the exhaust then clear immediately.
Z
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Post by aerologic on Oct 18, 2009 15:55:50 GMT -5
Thanks guys.
Just rode the CBX for 100 miles. 50 degrees. Very nice!. Rode the RE-5 20 miles yesterday in 41 degree weather. That was nippy for me!!
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Post by aerologic on Oct 19, 2009 16:07:29 GMT -5
I've noticed that my RE-5 does use some oil. I'm used to my CBX that uses none, zero. What is considered normal oil usage on an RE-5? I have not kept good enough records and I don't have enough miles to know what my usage is..
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shep
1st Gear
Posts: 93
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Post by shep on Oct 20, 2009 10:26:48 GMT -5
Don't know off the top of my head, but the FSM should list the flow rate for the oil metering pump. I can check when I get home if ya want.
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Post by aerologic on Oct 20, 2009 11:00:06 GMT -5
Hi Shep,
Not the metering pump. Yes that is documented. I mean engine sump oil. How much usage is normal? 1 QT per 1000 miles? Maybe the number is not really known and it's probably not ducumented...
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Post by tom93gts on Oct 20, 2009 15:19:42 GMT -5
Mine seems to not burn any measurable amount of oil from the sump, but I guess I don't really pile on too many miles either so could be I just didn't notice. I don't even notice the metering pump supply going down, how many miles should that tank usually last?
I was getting a lot of smoke at startup, but my petcock was leaking and the carb would over fill then drain into the throttle body. Startup would slightly flood the engine and puff out a big cloud that quickly burnt off. I fixed that and get very little smoke if any now.
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Post by aerologic on Oct 20, 2009 16:54:39 GMT -5
Tom,
Yikes! Not seeing the metering pump tank go down would scare me heck out of me. Have you done the calibration test in the Service Manual? I found some turkey baster at WalMart for 99 cents that was graduated so I just pulled the hose off of the tank and stuck the turkey baster in the line and filled it with oil and did the timed run. Of course I plugged the metering tank with something.
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shep
1st Gear
Posts: 93
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Post by shep on Oct 21, 2009 10:27:47 GMT -5
If you're burning a noticeable amount from the sump between oil changes, that could be a bad sign. Especially if its a qt per 1k miles. At that rate, you'd prob show significant signs of smoke. Do you get any blueish smoke at high rpms?
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Post by aerologic on Oct 21, 2009 11:35:59 GMT -5
Hi Shep,
I don't have any data really on oil consumption. I don't know what I initially filled the sump to. I just noticed that it was tending towards the low side. Heck. I have only ridden the bike for a couple hundred miles total anyway. I only have smoke the first minute or so. Nothing then as far as I can tell.
I know what the sump is at now. Now with cold coming, I doubt I'll get more than a couple hundred miles the rest of the year.
Plus I have to prime a lot with the throttle while cranking. That may be dumping oil in there via the metering pump. I'm probably OK. Compression is good.
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Post by aerologic on Oct 21, 2009 11:37:30 GMT -5
An additional thought. When I filled the sump after I got the bike and did an oil change, I might have thought that the "screw" should be in when checking oil. That would account for a big difference. A quarter inch at least.
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Post by Jess on Oct 22, 2009 18:25:56 GMT -5
Dave,
Oil sump check is performed with bike on center stand and dipstick set in the tank... Not screwed in.
There is always a POSSIBILITY of oil from the sump passing into the combustion chamber. It is most likely a sign of a weak jacket seal/oring.
However, this is not fatal, nor is it something to get worked up about... The motor could blow tomorrow, or it could go another 100,000 without issue.
Don't create problems where none exist. There are many variations that might disgiuse themselves as low sump oil. Until you specifically take exacting measurements... you can't make real observations.
Just my 2 cents.
Best,
Jess
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Post by aerologic on Oct 23, 2009 5:34:46 GMT -5
Jess,
I hear ya. Thanks.
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Post by Jess on Oct 23, 2009 21:40:27 GMT -5
No worries Dave... Enjoy her, she looks great!
Best,
Jess
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