14 rmz450 losing oil

Luke_Richards
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Luke_Richards
Edited Date/Time 6/11/2022 2:49pm
My 14 rmz450 is puking oil somewhere out the back of the engine, hard to tell exactly where, oil was just changed with exact amount, but when I checked the check bolt
A lot came out. Unsure if the hours because I bought used

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therealmclovin 7/6/2019 6:39pm
7/6/2019 6:39pm
Clean it up and run it for awhile see if you can find where the leak starts and go from there
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motomike894
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motomike894 7/6/2019 6:52pm
7/6/2019 6:52pm
Looks like Either your head gasket or maybe coming out of the oil overflow tube where it goes on the top, or the tube has little crack around there letting some oil
Blow by
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dirtmike86
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dirtmike86 7/6/2019 6:54pm
7/6/2019 6:54pm
Check the valve cover gasket. If its running fine I dont think a head gasket will be the culprit.
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Rotaholic
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Rotaholic 7/6/2019 6:59pm
7/6/2019 6:59pm
Is it using coolant? Head gasket can blow into the cam chain area and pressure builds and oil pukes out the breather where there is a hole at the top. Check the valve cover gasket first I guess.

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SEEMEFIRST
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SEEMEFIRST 7/6/2019 7:15pm
7/6/2019 7:15pm
If you have more volume than you put in, you are either adding gasoline or water to your oil.

Physics says: You put a quart of oil in, you won't get any more than a quart out.
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coastlinecascot
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coastlinecascot 7/6/2019 10:03pm
7/6/2019 10:03pm
I would guess you over filled the oil and it's blowing out the small hole at the top of the overflow tube
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MotoGUY
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MotoGUY 7/7/2019 5:49am
7/7/2019 5:49am
We just had an oil leak on sportbike at work and couldn’t find the culprit whether it was cases or a seal. Yamaha said to clean it up and cover the engine in baby powder and then run the bike you can confirm where it comes from. Just pressure wash off afterwards. Pretty easy to confirm where it’s coming from.
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Luke_Richards
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Luke_Richards 7/7/2019 10:00am
7/7/2019 10:00am
I’m assuming I have to much oil, it’s not burning coolant and runs fine, should I drain and when I fill it back with oil remove the check bolt and go off that reading instead of the 1200ml it says to put in with a filter change?
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Rotaholic
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Rotaholic 7/7/2019 12:13pm
7/7/2019 12:13pm
Make sure you drain it from all 3 drain bolts.
powertrip456 7/7/2019 12:35pm
7/7/2019 12:35pm
I don’t have a Suzuki, so I’m kind of irrelevant, but 1200mL sounds like too much. Did you get that from the manual?
Rotaholic
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Rotaholic 7/7/2019 12:41pm
7/7/2019 12:41pm
1200ml is stamped on the oil filter cover. The manual actually specifies 1100 for an oil change, 1150 for oil and filter and 1200 for an engine rebuild.
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powertrip456 7/7/2019 12:44pm
7/7/2019 12:44pm
Rotaholic wrote:
1200ml is stamped on the oil filter cover. The manual actually specifies 1100 for an oil change, 1150 for oil and filter and 1200 for an...
1200ml is stamped on the oil filter cover. The manual actually specifies 1100 for an oil change, 1150 for oil and filter and 1200 for an engine rebuild.
Ok. Sorry for wasting your time then!
Rotaholic
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Rotaholic 7/7/2019 12:48pm
7/7/2019 12:48pm
Rotaholic wrote:
1200ml is stamped on the oil filter cover. The manual actually specifies 1100 for an oil change, 1150 for oil and filter and 1200 for an...
1200ml is stamped on the oil filter cover. The manual actually specifies 1100 for an oil change, 1150 for oil and filter and 1200 for an engine rebuild.
powertrip456 wrote:
Ok. Sorry for wasting your time then!
The best thing about suzuki is nothing has changed in the last 12 years, so it's easy to remember. It's also the worst thing about suzukis lol
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Luke_Richards
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Luke_Richards 7/7/2019 1:16pm
7/7/2019 1:16pm
Rotaholic wrote:
Make sure you drain it from all 3 drain bolts.
I pull the engine plug and the screen and the filter, am I missing another drain plug somewhere lol
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Rotaholic
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Rotaholic 7/7/2019 2:23pm
7/7/2019 2:23pm
Engine plug, then by the gear shifter is the metal oil screen, then under the left hand plastic engine gaurd, down the bottom is an 8mm drain bolt, it will have a different washer to the other bolts around it. You will get a lot of oil out of that bolt.
zuk338
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zuk338 7/7/2019 2:36pm
7/7/2019 2:36pm
Rotaholic wrote:
Engine plug, then by the gear shifter is the metal oil screen, then under the left hand plastic engine gaurd, down the bottom is an 8mm...
Engine plug, then by the gear shifter is the metal oil screen, then under the left hand plastic engine gaurd, down the bottom is an 8mm drain bolt, it will have a different washer to the other bolts around it. You will get a lot of oil out of that bolt.
Yup drain at minimum the crankcase drain and the ignition cover drain. I always did all 3 just to clean the magnetic screen. 1100ml is correct as posted above.
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BobbyM
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BobbyM 7/7/2019 3:05pm
7/7/2019 3:05pm
Luke_Richards wrote:
My 14 rmz450 is puking oil somewhere out the back of the engine, hard to tell exactly where, oil was just changed with exact amount, but...
My 14 rmz450 is puking oil somewhere out the back of the engine, hard to tell exactly where, oil was just changed with exact amount, but when I checked the check bolt
A lot came out. Unsure if the hours because I bought used

Support the moto sponsors.
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G MONEY
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G MONEY 7/7/2019 5:37pm
7/7/2019 5:37pm
Luke_Richards wrote:
My 14 rmz450 is puking oil somewhere out the back of the engine, hard to tell exactly where, oil was just changed with exact amount, but...
My 14 rmz450 is puking oil somewhere out the back of the engine, hard to tell exactly where, oil was just changed with exact amount, but when I checked the check bolt
A lot came out. Unsure if the hours because I bought used

trade it in
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G MONEY
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G MONEY 7/7/2019 5:40pm
7/7/2019 5:40pm
Luke_Richards wrote:
My 14 rmz450 is puking oil somewhere out the back of the engine, hard to tell exactly where, oil was just changed with exact amount, but...
My 14 rmz450 is puking oil somewhere out the back of the engine, hard to tell exactly where, oil was just changed with exact amount, but when I checked the check bolt
A lot came out. Unsure if the hours because I bought used

BobbyM wrote:
Support the moto sponsors. [img]https://p.vitalmx.com/photos/forums/2019/07/07/358806/s1200_images_1.jpg[/img]
Support the moto sponsors.
hey bob m hope all's well jb
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Mike_Lawlor
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Mike_Lawlor 7/8/2019 3:40am
7/8/2019 3:40am
Mine leaked around the cam chain tensioner before. It’s easy to take it off and put a new gasket on.
mxpro252
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mxpro252 7/8/2019 5:58am
7/8/2019 5:58am
Rotaholic wrote:
Is it using coolant? Head gasket can blow into the cam chain area and pressure builds and oil pukes out the breather where there is a...
Is it using coolant? Head gasket can blow into the cam chain area and pressure builds and oil pukes out the breather where there is a hole at the top. Check the valve cover gasket first I guess.
What’s this “hole at the top of the breather” you speak of? Is there intentionally a hole in the hose up where it routes over the fi before routing down to the linkage?
Luke_Richards
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Luke_Richards 7/8/2019 5:13pm
7/8/2019 5:13pm
Rotaholic wrote:
Is it using coolant? Head gasket can blow into the cam chain area and pressure builds and oil pukes out the breather where there is a...
Is it using coolant? Head gasket can blow into the cam chain area and pressure builds and oil pukes out the breather where there is a hole at the top. Check the valve cover gasket first I guess.
mxpro252 wrote:
What’s this “hole at the top of the breather” you speak of? Is there intentionally a hole in the hose up where it routes over the...
What’s this “hole at the top of the breather” you speak of? Is there intentionally a hole in the hose up where it routes over the fi before routing down to the linkage?
Yes it’s a factory hole
Jmicmoto13
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Jmicmoto13 6/10/2022 8:17pm
6/10/2022 8:17pm
Was there ever a solution to this? Just rode my new to me 2012 RMZ450 and this same thing happened.
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Luke_Richards
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Luke_Richards 6/11/2022 9:20am
6/11/2022 9:20am
Jmicmoto13 wrote:
Was there ever a solution to this? Just rode my new to me 2012 RMZ450 and this same thing happened.
To much oil, are you draining from both drain holes?
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tylermx967
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tylermx967 6/11/2022 10:19am
6/11/2022 10:19am
I BRAKED THE OIL PLUG ON SUSZUKI RM85 FORM MAKING IT TO TITE AND MY DAD SAY YOU STRIPED IT AGANE TY SO WE GOED TO THE MUFLER SHOP AND SNAKE THAT USE TO WRESTLE IN TEXAS CHAMPIONSHIP WRESTLING BUT NOW A MECANIC GIVED US A BOLT TO BE DRAIN PLUG FORM ALICE CHALMERS TRACTOR AND WE PUT IT IN TO MAKE A NEW BIGGER HOLE AND NEVER LEAKS THE OIL
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Jmicmoto13
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Jmicmoto13 6/11/2022 12:42pm
6/11/2022 12:42pm
tylermx967 wrote:
I BRAKED THE OIL PLUG ON SUSZUKI RM85 FORM MAKING IT TO TITE AND MY DAD SAY YOU STRIPED IT AGANE TY SO WE GOED TO...
I BRAKED THE OIL PLUG ON SUSZUKI RM85 FORM MAKING IT TO TITE AND MY DAD SAY YOU STRIPED IT AGANE TY SO WE GOED TO THE MUFLER SHOP AND SNAKE THAT USE TO WRESTLE IN TEXAS CHAMPIONSHIP WRESTLING BUT NOW A MECANIC GIVED US A BOLT TO BE DRAIN PLUG FORM ALICE CHALMERS TRACTOR AND WE PUT IT IN TO MAKE A NEW BIGGER HOLE AND NEVER LEAKS THE OIL
Tyler, my man, what’re have you been! I have been searching for your eternal Suzuki wisdom!
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Jmicmoto13
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Jmicmoto13 6/11/2022 12:47pm
6/11/2022 12:47pm
Luke_Richards wrote:
To much oil, are you draining from both drain holes?
Yep, that’s what it was! I drained it out of the bottom plug and filled it up with 1050ML on Thursday. Went and rode and oil is puking everywhere. Tore it down today and cleaned it, then drained the oil from the bottom plug and stator drain plug. 1500ML came out. I simply didn’t drain all the old oil and it was overfilled with my additional 1050. Problem solved! Thanks for the response!

*as an aside, it’s majorly stupid to have a hole at the top of the crank case vent tube Suzuki. It was squirting out of there all over the back of the engine. Would be much easier to diagnose if it was coming out the bottom of the drain tube. Rant over.
Sandusky26
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Sandusky26 6/11/2022 2:49pm
6/11/2022 2:49pm
Jmicmoto13 wrote:
Yep, that’s what it was! I drained it out of the bottom plug and filled it up with 1050ML on Thursday. Went and rode and oil...
Yep, that’s what it was! I drained it out of the bottom plug and filled it up with 1050ML on Thursday. Went and rode and oil is puking everywhere. Tore it down today and cleaned it, then drained the oil from the bottom plug and stator drain plug. 1500ML came out. I simply didn’t drain all the old oil and it was overfilled with my additional 1050. Problem solved! Thanks for the response!

*as an aside, it’s majorly stupid to have a hole at the top of the crank case vent tube Suzuki. It was squirting out of there all over the back of the engine. Would be much easier to diagnose if it was coming out the bottom of the drain tube. Rant over.
Moto Hose makes a new breather that routes towards the front of the engine, looks way better than all those hoses.
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Rotaholic
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Rotaholic 7/1/2023 11:07am
7/1/2023 11:07am

Hard to see in that photo, take off the valve cover gasket and clean and inspect. 

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OwenJakes 4/4/2025 10:52am
4/4/2025 10:52am
Jmicmoto13 wrote:
Yep, that’s what it was! I drained it out of the bottom plug and filled it up with 1050ML on Thursday. Went and rode and oil...
Yep, that’s what it was! I drained it out of the bottom plug and filled it up with 1050ML on Thursday. Went and rode and oil is puking everywhere. Tore it down today and cleaned it, then drained the oil from the bottom plug and stator drain plug. 1500ML came out. I simply didn’t drain all the old oil and it was overfilled with my additional 1050. Problem solved! Thanks for the response!

*as an aside, it’s majorly stupid to have a hole at the top of the crank case vent tube Suzuki. It was squirting out of there all over the back of the engine. Would be much easier to diagnose if it was coming out the bottom of the drain tube. Rant over.
Sandusky26 wrote:
Moto Hose makes a new breather that routes towards the front of the engine, looks way better than all those hoses.

Fellow yellow riders - I am wondering if anyone has re-routed their vent hose and removed the tee in it? I'm trying to clean some things up on mine and I'm not quite sure why the crank vent is so elaborate on this bike.

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