crf450 04 hard to start and cuts out !" - Page 3

turtlemann14 · 08-10-2008, 07:30 PM

... it did for my bike

minimaterix · 08-11-2008, 09:36 AM

Quote:

Originally Posted by tigmaster

I would not go making this bike richer yet. That may cause more problems. It does not sound like a lean condition to me. Hardtail is going on the same thing I am questioning which is a stuck float needle or float. My first suggestion would be to disassemble the carburetor and clean it thoroughly. Remember guys, things don't just become lean for no reason. There is an underlying cause for everything. I would suggest a cleaning first.

If you could make a video of this problem occurring that would be great and speed up us solving the problem.

what shall i do with the carb just take it off and soak in gas or what and someone said it might be a problem with my gas tank cap its one of the pro billet whatever ones so it didnt come standard with the bike and it doesnt fit correctly it doesnt screw all the way down and some petrol leaks when i jump etc could this be the problem
and i cant really record a video because it happens randomly one mintute the bikes fine the next its dieing

tigmaster · 08-11-2008, 10:12 AM

The gas cap leaks? Does it have a breather tube attached to the top of it?

minimaterix · 08-11-2008, 10:45 AM

Quote:

Originally Posted by tigmaster

The gas cap leaks? Does it have a breather tube attached to the top of it?

yeah it has a cap on the breather tube tho it leaks from underneath the cap not the tube

tjscott2012 · 08-11-2008, 10:54 AM

well thats not good either, but warm up your bike, go ride it for a few minutes, park it, and then look at the spark plug. what color is the insulator?

minimaterix · 08-11-2008, 11:34 AM

Quote:

Originally Posted by tjscott2012

well thats not good either, but warm up your bike, go ride it for a few minutes, park it, and then look at the spark plug. what color is the insulator?

what is the insulator and do i need to take the plug out and can i just leave my bike to idle for abit to warm up because i cant ride it untill sunday my back yard is really small

tigmaster · 08-11-2008, 12:01 PM

Well... They seem to think your bike is running lean. However, things don't just become lean. How long has your bike been giving you trouble? Did it always do this? Something crazy like a huge elevation change would have to cause the bike from running great to cutting out randomly. Guys, not everything is a lean condition. I am not saying that it is not but ask questions that will take you there before just tossing out guesses.

OK, so now more suggestions. If this is a random problem then electrical could always be the man at fault. If you can't ride until Sunday, go through now and check all of the electrical connections. Look for anything loose, frayed, or rubbing on other things. Electrical problems are some of the oddest thins ever.

You could check the plug color but that would provide us with no useful data because there is not one single range where it cuts out. You said it cuts out sometimes at idle and sometimes while riding it. There is no reason to check the plug. Not going to be able to tell anything from checking the plug at idle or from "riding your bike for a few minutes."

Answer those questions I had in the first paragraph and we will go from there.

minimaterix · 08-11-2008, 12:25 PM

im sorry i did not state this but it was the first time ive been out on the bike i brought it last week sorry!

tigmaster · 08-11-2008, 12:28 PM

Oh... well this changes lots of things. Could be anything then. I would suggest a leakdown and compression test. If you are not sure then have someone do it but I would say you need to have that looked at first. If that all checks out then I would look at fuel mixture settings. You never did answer my question about the choke. What happens if you start it and run it with the choke on? Does it not die then? When you are going fast and you let off the gas fast does it make any loud popping noises?

minimaterix · 08-11-2008, 12:39 PM

Quote:

Originally Posted by tigmaster

Oh... well this changes lots of things. Could be anything then. I would suggest a leakdown and compression test. If you are not sure then have someone do it but I would say you need to have that looked at first. If that all checks out then I would look at fuel mixture settings. You never did answer my question about the choke. What happens if you start it and run it with the choke on? Does it not die then? When you are going fast and you let off the gas fast does it make any loud popping noises?

no it doesnt backfire when i go fast and lett of the gas and it will run with the choke on and for added info when i go slow well around 30mph around the track without givin it much gas it is ok but because it was a really wet day i couldnt get any power down asoon as i gave it gas the back wheel would just spin everywere when i done this then the problem of it dieing would usually happen when i took it easy it seemd to be fine so it must be overheating right?

08-10-2008, 07:30 PM	#21 (permalink)
turtlemann14 Pro Mototips Member Join Date: Oct 2007 Location: West Virginia Posts: 3,990 iTrader: (0)	... it did for my bike __________________ If it does not move at first, get a bigger hammer!! Myspace Yamaha 1982 xj550 under bike lights Kawasaki klx250 1979 custom fiberglass silencer+ Honda xr200r 1985 stock = Dakaw Dk250 2008

08-11-2008, 10:12 AM	#23 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	The gas cap leaks? Does it have a breather tube attached to the top of it? __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

08-11-2008, 10:54 AM	#25 (permalink)
tjscott2012 The Spam man Join Date: Nov 2007 Location: Hurley, Mo Posts: 4,867 iTrader: (0)	well thats not good either, but warm up your bike, go ride it for a few minutes, park it, and then look at the spark plug. what color is the insulator? __________________ 87 Banshee Red Frame, Black plastics. bone stock (for now) -Life is full of ups and downs, so I say, get a quad and jump those mother****ers

08-11-2008, 12:01 PM	#27 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	Well... They seem to think your bike is running lean. However, things don't just become lean. How long has your bike been giving you trouble? Did it always do this? Something crazy like a huge elevation change would have to cause the bike from running great to cutting out randomly. Guys, not everything is a lean condition. I am not saying that it is not but ask questions that will take you there before just tossing out guesses. OK, so now more suggestions. If this is a random problem then electrical could always be the man at fault. If you can't ride until Sunday, go through now and check all of the electrical connections. Look for anything loose, frayed, or rubbing on other things. Electrical problems are some of the oddest thins ever. You could check the plug color but that would provide us with no useful data because there is not one single range where it cuts out. You said it cuts out sometimes at idle and sometimes while riding it. There is no reason to check the plug. Not going to be able to tell anything from checking the plug at idle or from "riding your bike for a few minutes." Answer those questions I had in the first paragraph and we will go from there. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

08-11-2008, 12:28 PM	#29 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	Oh... well this changes lots of things. Could be anything then. I would suggest a leakdown and compression test. If you are not sure then have someone do it but I would say you need to have that looked at first. If that all checks out then I would look at fuel mixture settings. You never did answer my question about the choke. What happens if you start it and run it with the choke on? Does it not die then? When you are going fast and you let off the gas fast does it make any loud popping noises? __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

08-11-2008, 12:25 PM	#28 (permalink)
minimaterix C Rider Join Date: Apr 2008 Posts: 54 iTrader: (0)	im sorry i did not state this but it was the first time ive been out on the bike i brought it last week sorry!

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