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Old March 13th, 2018, 11:03 AM   #41
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Originally Posted by Triple Jim View Post
There isn't any oil pumped to the primary gears, they just sit where oil gets on them from the sump. Not that your post isn't good, I just didn't want B to think his oil pump may have a problem, just from hearing the gear whine.
I appreciate your respectful disagreement with my post.

If you go out to the garage and stand the EX250 up on its wheels (as level as you can), then crouch down and eyeball the location of the oil sight-glass and the (obvious beneath the right-hand engine side cover) location of the engine's crankshaft you'll realize that the resting (engine not running) level of the sump oil is below the crankshaft's primary gear.

When the engine is running the sump oil level is much lower (than this engine-off oil level sight-glass) due to the large percentage of the engine oil volume that is currently being pumped throughout the system.

The EX250 Service Manual Engine Lubrication System diagram shows pressurized oil delivered to each of the engine's three main bearings with outputs from the crankshaft into each of the piston big ends and at both ends of the crankshaft (with the right-hand end being the area of the cam chain and the primary gear).
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Old March 13th, 2018, 11:10 AM   #42
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Originally Posted by greg737 View Post
I appreciate your respectful disagreement with my post.

If you go out to the garage and stand the EX250 up on its wheels (as level as you can), then crouch down and eyeball the location of the oil sight-glass and the (obvious beneath the right-hand engine side cover) location of the engine's crankshaft you'll realize that the resting (engine not running) level of the sump oil is below the crankshaft's primary gear.

When the engine is running the sump oil level is much lower (than this engine-off oil level sight-glass) due to the large percentage of the engine oil volume that is currently being pumped throughout the system.

The EX250 Service Manual Engine Lubrication System diagram shows pressurized oil delivered to each of the engine's three main bearings with outputs from the crankshaft into each of the piston big ends and at both ends of the crankshaft (with the right-hand end being the area of the cam chain and the primary gear).
So if that's a possible cause of the whine, does it mean that maybe I haven't put enough oil when changing it? It was my first time, but the oil level was between the two lines, closer to the upper one, so I think I got that one right lol.
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Old March 13th, 2018, 11:15 AM   #43
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So if that's a possible cause of the whine, does it mean that maybe I haven't put enough oil when changing it? It was my first time, but the oil level was between the two lines, closer to the upper one, so I think I got that one right lol.
That's the part of my post that Triple Jim was absolutely right to be concerned about. It was never my intention to suggest that your EX250 was currently low on oil or that its oil pump wasn't operating properly.

You sound like a very conscientious owner, I'm sure you're doing a fine job with things like engine oil.
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Old March 13th, 2018, 11:20 AM   #44
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Greg, you're saying that oil pumped to the right main bearing gets out into the primary gear area and onto the gears? OK, I'll buy that. I think I was probably biased from my 2-stroke experience... those engines have sealed bearings, of course, so no oil gets to the primary gears by that route.
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Old March 13th, 2018, 11:30 AM   #45
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Originally Posted by Triple Jim View Post
Greg, you're saying that oil pumped to the right main bearing gets out into the primary gear area and onto the gears? OK, I'll buy that. I think I was probably biased from my 2-stroke experience... those engines have sealed bearings, of course, so no oil gets to the primary gears by that route.
Yes, the EX250 Service Manual Engine Lubrication System diagram uses what looks like a large comma (or maybe it's an apostrophe) to indicate locations where oil under pressure flows out of ports/vents in the camshafts and gearbox shafts and from the perimeters of plain bearings and there's a comma/apostrophe shown at both ends of the crankshaft.

(I'm looking at my Pre-Gen Service Manual but I'm pretty sure the crankshaft oil flow didn't change with the Next-Gen)
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Old March 13th, 2018, 12:00 PM   #46
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Originally Posted by greg737 View Post
But I absolutely love me some good straight-cut gear noise.

The 5th Generation VFR 800 (1998 to 2001) is the (everyday motorcycle) king of gear-whine with its gear-driven camshafts. All of those wonderful straight-cut cogs mated to each other from the crankshaft up to the four individual camshafts of the V-4.
Me too.

My son has a '98 VFR, and he loves the gear sound. It's pretty loud (in a good way).
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Old March 13th, 2018, 12:07 PM   #47
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Quote:
Originally Posted by Hesh View Post
So if that's a possible cause of the whine, does it mean that maybe I haven't put enough oil when changing it? It was my first time, but the oil level was between the two lines, closer to the upper one, so I think I got that one right lol.
Here's the proper procedure, just for reference -

https://faq.ninja250.org/wiki/How_do_I_check_my_oil%3F

One common mistake people make is to change the oil and filter, then fill the engine until the sightglass is at the proper level. Once the engine starts and oil is pumped into the filter the level drops - and it's too low.

That's why you need to run it briefly (there's plenty of oil to be safe temporarily), then shut it off and check it again after waiting the proper amount of time. The time delay gives the oil time to run back down to the sump - which is all factored-in to the correct level reading. The bike also needs to be help perfectly level to get an accurate reading.
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Old March 13th, 2018, 12:41 PM   #48
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Originally Posted by jkv45 View Post
Here's the proper procedure, just for reference -

https://faq.ninja250.org/wiki/How_do_I_check_my_oil%3F

One common mistake people make is to change the oil and filter, then fill the engine until the sightglass is at the proper level. Once the engine starts and oil is pumped into the filter the level drops - and it's too low.

That's why you need to run it briefly (there's plenty of oil to be safe temporarily), then shut it off and check it again after waiting the proper amount of time. The time delay gives the oil time to run back down to the sump - which is all factored-in to the correct level reading. The bike also needs to be help perfectly level to get an accurate reading.
Yeah, I read all that carefully before doing it and did it exactly how it's supposed to be and the oil level was good.

About the whining, I guess I'll have to learn to live with it if I don't find what's causing it for sure and get it fixed. I wouldn't mind it if it's a little, but it does silence the actual bike noise, which I'd much rather be hearing lol.
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Old March 13th, 2018, 05:32 PM   #49
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Get a header, that'll drown out the whining.
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Old March 14th, 2018, 04:20 AM   #50
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Originally Posted by Hesh View Post
Yeah, I read all that carefully before doing it and did it exactly how it's supposed to be and the oil level was good.

About the whining, I guess I'll have to learn to live with it if I don't find what's causing it for sure and get it fixed. I wouldn't mind it if it's a little, but it does silence the actual bike noise, which I'd much rather be hearing lol.
Enough of your whining, just get ear plugs!
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Old March 14th, 2018, 04:45 AM   #51
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Enough of your whining, just get ear plugs!
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Old March 14th, 2018, 07:22 AM   #52
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No seriously, I always wear earplugs and you can hear your engine much better.
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Old March 14th, 2018, 07:46 AM   #53
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No seriously, I always wear earplugs and you can hear your engine much better.
Pretending the noise isn't there isn't the solution for me lol. Gotta fix that mf.
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Old March 14th, 2018, 08:11 AM   #54
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Pretending the noise isn't there isn't the solution for me lol. Gotta fix that mf.
Yeah, noise could be a warning of impending mechanical issues.
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Old March 19th, 2018, 09:10 AM   #55
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I bought my 250 new gen brand spanking new and put the very first mile on the bike. It has made that whine since mile 1, and with 5k+ street/track/race miles on it, it makes the very same whine to this very day. No harm in ensuring proper operation though. Stopped worrying about it long ago...

Earplug tip is valid: they dull the less important stuff so you can hear vital things.

EDIT: Now that I think about it more, seems the whine is less pronounced on higher mileage bikes.
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