Posts: 938
Joined: 10/10/2008
Location: MI, USA
Seems like there has been a few issues with bikes running dry of coolant and such but still no DNFs. Makes you wounder how long can a bike run with no coolant, how long could a bike run with no oil, ect.... Sounds like these modern day 4 strokes are a lot more durable than we think.
Posts: 2247
Joined: 3/28/2016
Location: Woodbine, NJ USA
Posts: 2602
Joined: 8/30/2013
Location: KY, USA
Posts: 8304
Joined: 10/19/2010
Location: AS, USA
Edited Date/Time:
racerx217 wrote:
Seems like there has been a few issues with bikes running dry of coolant and such but still no DNFs. Makes you wounder how long can a bike run with no coolant, how long could a bike run with no oil, ect.... Sounds like these modern day 4 strokes are a lot more durable than we think.
Who has run dry of coolant or oil?
much ty. How to spot a paid forum poster/artificial forum traffic producer (see list of actions/phrases below):
Copius pattern amounts of phrases like “Anyone have”..., “Anybody know?”.... and their variations.
Thoughts?
Any help is appreciated!
Thanks in advance!
Posts: 42
Joined: 8/6/2014
Location: Sanford, CO USA
Raced an enduro two weeks ago and was near the same minute as another dude on a crf 250. Saw him at the end of the day and he told me he had gone down early in the day and ridden the next 4-5 hours with the bike running "odd". Finally took a look at it during a gas stop and saw there was no coolant left. He dnf'd but bike was still running after who knows how long with no coolant.
Posts: 3671
Joined: 1/17/2013
Location: TN, USA
racerx217 wrote:
Seems like there has been a few issues with bikes running dry of coolant and such but still no DNFs. Makes you wounder how long can a bike run with no coolant, how long could a bike run with no oil, ect.... Sounds like these modern day 4 strokes are a lot more durable than we think.
kzizok wrote:
Who has run dry of coolant or oil?
Fairly sure it was Osborne's bike that lost coolant at Spring Creek in moto1 and he still managed a solid finish. Looked very good for Husky's resume.
There's something happening here, what it is ain't exactly clear.
Posts: 7122
Joined: 10/31/2013
Location: PA, USA
Posts: 8304
Joined: 10/19/2010
Location: AS, USA
Edited Date/Time:
racerx217 wrote:
Seems like there has been a few issues with bikes running dry of coolant and such but still no DNFs. Makes you wounder how long can a bike run with no coolant, how long could a bike run with no oil, ect.... Sounds like these modern day 4 strokes are a lot more durable than we think.
Some head gasket oil leakage.
much ty. How to spot a paid forum poster/artificial forum traffic producer (see list of actions/phrases below):
Copius pattern amounts of phrases like “Anyone have”..., “Anybody know?”.... and their variations.
Thoughts?
Any help is appreciated!
Thanks in advance!
Posts: 1050
Joined: 3/31/2014
Location: Mackay QLD, AUS
Posts: 233
Joined: 12/10/2016
Location: Duluth, MN USA
Edited Date/Time:
racerx217 wrote:
Seems like there has been a few issues with bikes running dry of coolant and such but still no DNFs. Makes you wounder how long can a bike run with no coolant, how long could a bike run with no oil, ect.... Sounds like these modern day 4 strokes are a lot more durable than we think.
No coolant, 3.34 laps.
Posts: 1694
Joined: 2/4/2015
Location: GBR
TheOriginalPancakee wrote:
I don't run oil or coolant. F that stuff
To right
Posts: 6058
Joined: 4/1/2008
Location: CA, USA
Posts: 5523
Joined: 11/16/2011
Location: Menifee, CA USA
BobPA wrote:
A bike with no oil is not going to last long.
...But a lot longer than you might think. We did a test at a dealership I used to work at, using a clapped-out old Honda streetbike and the dyno. We drained all the oil and then put it on the dyno for a full-throttle run with someone sitting on it. The thing lasted a good two or three minutes before it even started smoking. (It went downhill fast after that.)
Braaapin' aint easy.
Posts: 8345
Joined: 3/12/2011
Location: Fort Worth, TX USA
I went to change the oil in my bike once and when I pulled the drain plug, nothing came out. To this day, I have no clue where the oil went. I vividly recall putting oil in it the prior race and didn't do anything else to the oil after that. No clue how long it went without oil but it ran for years after that incident.
Posts: 3404
Joined: 4/1/2008
Location: TN, USA
Posts: 1034
Joined: 9/16/2016
Location: Katy, TX USA
Posts: 8304
Joined: 10/19/2010
Location: AS, USA
mx317 wrote:
It was reported that it was one of the rubber half-circles under the valve cover that came out.
What you said
much ty. How to spot a paid forum poster/artificial forum traffic producer (see list of actions/phrases below):
Copius pattern amounts of phrases like “Anyone have”..., “Anybody know?”.... and their variations.
Thoughts?
Any help is appreciated!
Thanks in advance!
Posts: 1779
Joined: 4/5/2016
Location: Morrison, CO USA
Posts: 6058
Joined: 4/1/2008
Location: CA, USA
Interesting, they told my friend it was a hose clamp failure a d evrn showed him the hose and clamp.
Posts: 6468
Joined: 2/3/2010
Location: Lehi, UT USA
I raced an entire enduro with no coolant (because I'm an idiot)...by the end it would idle...but I finished.
I had to rebuild the entire motor after.
09 YZ450
Posts: 936
Joined: 3/21/2013
Location: Canton, OH USA
In the early 2000s I had an 03 crf 450. In the 4 stroke class, my 3rd Moto I had to finish top 6 to make it. I was passing for 2nd on the last lap and my bike blew up at the bottom of the ski jump. Found a water pump seal went sometime during the Moto. It was probably only a 4 or 5 lap Moto. Kaboom.
Posts: 4812
Joined: 8/2/2006
Location: San Diego, CA USA
UpTiTe wrote:
Interesting, they told my friend it was a hose clamp failure a d evrn showed him the hose and clamp.
http://racerxonline.com/2017/07/26/observations-millville
When it’s your year, it’s your year, man. Ask The Smashing Pumpkins how well 1995 went for them. Everything they touched turned to gold including a double CD! Well, in years past Osborne’s valve cover gasket blowing out would’ve definitely led to a DNF but not this year. He nursed the bike home and then for good measure caught and passed Savatgy from a ways back in the second moto to take the moto win. He’s so hot right now.
Posts: 1306
Joined: 3/28/2015
Location: Satan's Hollow, OK USA
Posts: 8633
Joined: 10/31/2009
Location: CA, USA
My mate lost all the coolant in his 2016 CRF450, lasted the entire moto and still runs fine now i..e no rebuild after...just filled it back up with coolant after it cooled down and everything was fine.
As seems most of the experience here in this thread, I think that if you had a muddy race/tight course race, the bike may struggle to keep cool with no coolant and blow up...but a dry and open race where it has more chance to get more air cooling then the less likely its an issue.
I cant see ANY bike surviving more than 3-4 mins with no oil though, even if it did it would need a rebuild after.
Current rides: 2020 CRF450RWE and 2019 TC300
Occasional ride for VMX: 1985 CR500RF
Adventure/Road bike: CRF1000L
Posts: 703
Joined: 9/3/2015
Location: Bakersfield, CA USA
Oil and coolant is just added weight,
Thank you,
Fly Racing, WPS, Dt-1, Mika Metals, Maxima, 100%, Motostuff, Factory Connection, Evs
