Left choke on for 1/2 hour, engine over heated

[throtl]

Today I thought Ill run the bike with the choke on for half an hour before work so I can run in the engine. Very strange that the engine got very hot. I let it sit for 5 minutes then toped up with fuel and oil and took it for a little spin, it was so hot that the seat was warm. I wont be doing that again. Take this as a warning guys.

 

[eichkay]

Nothing to do with choke , thats holding the throttle on for too long and no-air movement, thus overheating the motor..

You dont need to have the choke open all the way to warm the bike up either btw... once you start just back it off to half or lower, just enuff to keep the bike running to warm up...

 

[throtl]

Aha, that explains it, I also had it in the garge too. Hope I havnt degraded the engine. The point of it was to help run in the engine. The manufacturer says 34 freaken hours run in, thats a loooooooooooooooooooooooong time.

 

[eichkay]

Yes that is a long time... my bike has an hour meter on it and it nearly 2 years old and its nearly at 70hrs

 

[Scott]

You Dont need 34 hours to Run it in. The Manufacturers say Funny things about these Bikes, some quote 12HP engines, Marzocchi Suspension etc. Dont beleive everything in The Manual.

 

[Stunt101]

strange.... i use the choke to turn my CRF off!

& run in time should only b a tank of fuel at the most!

 

[eichkay]

We sell honda generators and the run in time is listed as 10hr's which is around 2 tanks of gas.

 

[Stunt101]

but for bikes the general is one tank, unless you abuse your engine then the recomendation is not to own a motorcycle!

 

[Power Man]

Run in 34hrs PFFFFFFF.
My bike took around 2- 5 hrs. for a good run in.

MUST DO'S FOR RUN IN

- Run the engine for the 1st time and as soon as you finish using it drain oil !
- run the engine in all types of speeds and senarios (eg flat track , up slight hils, up hills) and as time goes on rev it a little harder. This will ensure any metal shavings will dislodge and stick in you oil. This is why it is a good idea to drain as soon as you are finished using the engine.
After you think your bike has been run in give it a flush of oil to further remove and metal particles present.

 

[throtl]

I heard run in time was between 2-4 tanks depening on person. Heres what else it says-

During run in time please do not exceed 20km in second
30km in third
40km in forth

Iv already broken this, broken but not abused it.

On oil changes it says change transportation oil when you recieve the bike.
then change with
7 hours usage
18 hours usage
34 hours usage

 

[roost]

talking about running bikes in, i have done it to 5 race motors so far an no problems as yet, this method does work http://mototuneusa.com/break_in_secrets.htm

 

[throtl]

Roost thanks very much for that, if only I had access to that earlyer. Iv gone through about 1 and 3/4 tanks but will apply this technique.

 

[Mack]

After a hard run in I've seen identical bikes run much cleaner and cooler. Not to mention they develop much greater power right through the rev range.

 

[minidirt]

After a hard run in I've seen identical bikes run much cleaner and cooler. Not to mention they develop much greater power right through the rev range.

definately agree with this, i've seen many bikes that haven't really had a running in period so to speak of, never causes a problem.

 

[Mack]

The real issue with the gentle run in theory is not, is it better, but is it actually detrimental? The principles behind this issue are not complicated.

 

[minidirt]

well do you think it causes glazed rings/bore?

 

[Mack]

I'm sure it does. Then with blow-by occurring, and the heat produced by these engines, the bore can distort further, starting a vicious cycle. Your oil will become burnt and go to **** very quickly, you will have excessive crankcase pressure, the motor will not burn fuel as efficiently and start to build up carbon everywhere. The problems go on. These engines are nearly impossible to tune properly and will never perform as one that was run hard from the start.

Now luckily.... some guys can't resist giving their new bike some stick on the first day, and achieve a reasonable ring seal. They just did themselves a big favour! The poorest running bikes I have seen are those owned by the cautious types who have run in very carefully and over many tanks of fuel. Especially without loading up the engine. Things like letting it idle for 10 to 15 mins to warm up are a big no no.

 

[eichkay]

I just jumped on and rode my bike did 5min runs flat out up and down the gears let it cool down at a mates, have a few beers and then ride it home and then back to his the next day ,, this went on for the first few weeks i had the bike, that was my run in... Same bike, same jailing motor 2 years later, no smoke and very hi-compresson i cant normally jumpstart the bugger on concrete.

 

[noidea]

"normally jumpstart the bugger on concrete."

try 2nd or 3rd gear and try and put as much weight back as far as u can. But be careful if your giving it some throttle so that when it starts u dont flip it.

Ive done the W.O.T run in, engine seems fine. dont hav another of the same engine to compare it tho.

A very important thing with the run in of these engines is changing the oil frequently. You will understand when you do your first oil change and see the loose castings/metal shavings in your oil.

 

[minidirt]

must have some insane compression if you can't bump started, i'm sure you know, but really drop your ass onto the seat as you dump the clutch out.
and to the running in thing again, the only thing i really wouldn't advice would be giving it a work out or revving it heaps for an extended period of time, just for the reason the tight engine would get hot, so no extended hard work for, well lets just say not very long, (less than a tank) and it'll all be sic .

a mate of mine got a mini bike, he tells me that he let it idle for 15 minutes to run it in! funny thing is that the guy brakes every bike and car he has, he just stuffs them, the time he tries to look after one, he might have done his usuall harm.