Hanging rev 250r air cooled passed leak down test

[barnett468]

.
PS: Don't forget the gas level test with the clear plasic tube.

At the very least, it looks like their is a lite at the end of the tunnel.





OMG...its "light" as in "light bulb, NOT "lite" as in "lite beer" you tard!

[knipfeldustin]

As of now my plan is to test with the needle clip all the way down first.

Next ill try a different plug (prob tommorrow) .... U want me to go to a 7 or 10 ? I have seen both suggested here

I will then perform the air screw tests.

I will order some larger main jets this afternoon in the 400s range. Say 400, 410, 420 for starters ?

[knipfeldustin]

I'll do the gas tube test today also

[knipfeldustin]

On the race fuel subject....when i first got this bike and took it home I drained the tank and carb ....the smell of the whatever was in it was like nothing I've ever smelled before. I had a 310esr that ran on 110 so I'm familiar with what 110 smells like and whatever came out of is tank smelled like neither reg old pump gas or fresh race gas.......I've never smelled old race fuel though maybe that's what the funny smell was.....it was nothing like the turpentine smell of old gas ....def a first time smell for me and a friend both.

[barnett468]

.
Howdy!

As of now my plan is to test with the needle clip all the way down first.

That won't hurt, however, raising the needle will NOT increase the amount of fuel at WOT where your problem is. There is very specific reasons we suggest the things we do, and I even explained the purpose of doing this. Not ALL of us here are tards...well...not ALL of the time anyway.

Next ill try a different plug (prob tommorrow) .... U want me to go to a 7 or 10 ? I have seen both suggested here

I mentioned a 10 plug around 10 times now. I have not changed my mind. Unless the person suggestiong a 7 meant a 7 in a Champion [their number system is reversed] that person either doesn't like you very much or they are....well....possibly a tard.

I told you that a 10, which is just one heat range colder, will lower your cylinder temps by as much as 212 blazing degrees. Since your combustion chamber is already blazing hot enough to auto ignite the gas, if you think that making it even more blazing hot is a good idea then by all means feel free to do it. At least we'll finally get to see your combustion chamber along with what's left of your top end when you have to remove it because your piston vaporized into a plasma gas.

I will order some larger main jets this afternoon in the 400s range. Say 400, 410, 420 for starters ?

As I mentioned several times, according to your description of how it runs on top end there is no indication that it is lean even with the 370. This is because you stated it less "dogginess" or was less "doggy" with the 370 then it did/was with the 390. Most peoples suggestions here are based upon your description of the problem. As I said, I'm not sure exactly how the word/term "dogginess" or "doggy" translates into a specific performance issue with your engine, but I do understand how it might relate to how the girl I dated last night looked after I sobered up enough this morning.


OMG...Hey BACON...either get some glasses or quit drinkin!

[DohcBikes]

All these words, one main jet change, and a short, pissed off ride.

You said its revving when you let off the throttle after a wide open run. What if the EGT is high enough, and the pilot is lean enough, that when it re-enters lean the pilot circuit, it takes off revving. Anybody got a theory on that? As some here know, im no scientist.

More changes, more ride reports please.

[DohcBikes]

Theres so much conflicting info in this thread now that its really hard to follow.

Thats why tuning a bike is best done as a physical act.

Stop ruling things out by discussion, or you'll never find the issue. Get out there and TRY some stuff.

TUNING 101: If you change something, and it gets worse, do the opposite. If you change something and it gets better, even a tiny bit, do it more. The common theme here, CHANGE THINGS.

At this point my recommendation is to get a CR250F engine for it

[knipfeldustin]

No problem ill take it from here. Thanks everyone for the help up to this point.

[barnett468]

On the race fuel subject....when i first got this bike and took it home I drained the tank and carb ....the smell of the whatever was in it was like nothing I've ever smelled before. I had a 310esr that ran on 110 so I'm familiar with what 110 smells like and whatever came out of is tank smelled like neither reg old pump gas or fresh race gas.......I've never smelled old race fuel though maybe that's what the funny smell was.....it was nothing like the turpentine smell of old gas ....def a first time smell for me and a friend both.

Maybe it was the smell of race gas and pump gas mixed together.


Oh...My...GOD!

[DohcBikes]

LMFAO^^^^^Cmon Dustin you gotta see the humor in that one.........Right?

Just wanna hear some tuning results, then we can help. Your problem is a common one, but it happens for several reasons. If you make more changes, we will be more likely to be led in the direction of the culprit. Try to understand that it is very difficult to diagnose an engine over the internet. (even though the people on this thread are very good at it.)

Sincerely though good luck with the process, but dont rule ANYTHING OUT

[barnett468]

I will order some larger main jets this afternoon in the 400s range. Say 400, 410, 420 for starters ?

Yes, I might start with the 420 at this point. If it fixes it but burbles at wot then go down 1 at a time until it's happy. Don't worry about the burble at lower rpm's, that can be fixed with a smaller jet needle or shorter jet needle choke height or different needle etc..

[DohcBikes]

I might start with the 420 at this point.

Yes absolutely.

I think in this case it WOULD be best to start with the 420.

[El Camexican]

On the race fuel subject....when i first got this bike and took it home I drained the tank and carb ....the smell of the whatever was in it was like nothing I've ever smelled before. I had a 310esr that ran on 110 so I'm familiar with what 110 smells like and whatever came out of is tank smelled like neither reg old pump gas or fresh race gas.......I've never smelled old race fuel though maybe that's what the funny smell was.....it was nothing like the turpentine smell of old gas ....def a first time smell for me and a friend both.

Did you clean your petcock?

[knipfeldustin]

Yes I will perform more tests and get back to you guys. Yes my petcock is clean.....and yes that was funny (mixed fuel joke) I'm not against you guys or trying to piss you all off. I am working on these tests but I do feel the need to comment back whenever someone asks me something I will meSs around with it today and see what happens.

[barnett468]

.

Did you clean your petcock?

. . .

I don't know who did it but someone cleaned the bejesus out of this one!





Holy cr_p...it's a talking pig AND a naked chicken!