crf450 04 hard to start and cuts out !" - Page 6

minimaterix · 08-12-2008, 12:58 PM

Quote:

Originally Posted by tjscott2012

oh, was it running bad while you did that? i know in my manual it says to ride it full throttle in any gear, then stop, but i think thats accurate enough. lol, kind of alot to ask for in a garden with a 450

what do you think the problem is then ?

tjscott2012 · 08-12-2008, 01:02 PM

takes forever to start, gets hot, if i had to guess it would be cdi, but its beyond me

tigmaster · 08-12-2008, 01:25 PM

Well.... I guess I will jump back in here. Lean condition eh??? So anyways, THERE IS NO WAY TO DETERMINE FUEL MIXTURE ON THE LOW END BY LOOKING AT THE PLUG!!! So guys lets stop suggesting that as an option. The only thing you can tell from a plug check is top end mixture. And that is only done by making a high speed pass with the bike pinned and killing it while it is pinned while pulling the clutch in and stopping. However, we were not concerned with what was going on on the top end. He is having erratic problems that do not point to that.

Now, you have distracted him from doing reasonable and legitimate tests such as cleaning out the carburetor and checking the electrical system over. These need to be done to rule out a vast majority of problems. Obviously the bike has been touched lots. From the fact that there is a large amount of suspension work done, says to me that the bike has been raced. Check the things over I recommended and we can go from there. If you do not do those things I we will not be able to progress with this problem.

Also, what is this issue of overheating? Four strokes overheat if you are not going fast enough. Idling around will cause antifreeze to overflow. So what is the overheating issue?

minimaterix · 08-12-2008, 01:41 PM

Quote:

Originally Posted by tigmaster

Well.... I guess I will jump back in here. Lean condition eh??? So anyways, THERE IS NO WAY TO DETERMINE FUEL MIXTURE ON THE LOW END BY LOOKING AT THE PLUG!!! So guys lets stop suggesting that as an option. The only thing you can tell from a plug check is top end mixture. And that is only done by making a high speed pass with the bike pinned and killing it while it is pinned while pulling the clutch in and stopping. However, we were not concerned with what was going on on the top end. He is having erratic problems that do not point to that.

Now, you have distracted him from doing reasonable and legitimate tests such as cleaning out the carburetor and checking the electrical system over. These need to be done to rule out a vast majority of problems. Obviously the bike has been touched lots. From the fact that there is a large amount of suspension work done, says to me that the bike has been raced. Check the things over I recommended and we can go from there. If you do not do those things I we will not be able to progress with this problem.

Also, what is this issue of overheating? Four strokes overheat if you are not going fast enough. Idling around will cause antifreeze to overflow. So what is the overheating issue?

i fought it might be overheatin issue as when i am going fast which i couldnt do very well becasue the back end would flick out everywere and wheelspin it would cut out and btw cleaning out the carb shall i leave it to soak in gas or what?

tigmaster · 08-12-2008, 01:50 PM

For cleaning out the carburetor you can just use some carb cleaner and spray it through all the openings. If you were riding in the mud, your bike will over heat no matter what.

minimaterix · 08-12-2008, 01:52 PM

Quote:

Originally Posted by tigmaster

For cleaning out the carburetor you can just use some carb cleaner and spray it through all the openings. If you were riding in the mud, your bike will over heat no matter what.

cani use anythink else i dont have any carb cleaner?

tigmaster · 08-12-2008, 01:55 PM

You either need to use something pressurized or you will have to disassemble everything and scrub it with a toothbrush. It is always soaking in gas so that will do no good unless you scrub it.

tjscott2012 · 08-12-2008, 02:00 PM

Quote:

Originally Posted by tigmaster

Well.... I guess I will jump back in here. Lean condition eh??? So anyways, THERE IS NO WAY TO DETERMINE FUEL MIXTURE ON THE LOW END BY LOOKING AT THE PLUG!!! So guys lets stop suggesting that as an option. The only thing you can tell from a plug check is top end mixture. And that is only done by making a high speed pass with the bike pinned and killing it while it is pinned while pulling the clutch in and stopping. However, we were not concerned with what was going on on the top end. He is having erratic problems that do not point to that.

Now, you have distracted him from doing reasonable and legitimate tests such as cleaning out the carburetor and checking the electrical system over. These need to be done to rule out a vast majority of problems. Obviously the bike has been touched lots. From the fact that there is a large amount of suspension work done, says to me that the bike has been raced. Check the things over I recommended and we can go from there. If you do not do those things I we will not be able to progress with this problem.

Also, what is this issue of overheating? Four strokes overheat if you are not going fast enough. Idling around will cause antifreeze to overflow. So what is the overheating issue?

tigmaster, it was a 5 minute test that now rules out that its running lean. not really a waste of time

turtlemann14 · 08-12-2008, 02:16 PM

going up though the gears is bad at low speed it makes the engine run rich anyway...
thats why you keep it low in the gears and high in the rpm

why can't you let it idle with no load on the engine to check the plug?

you plug needs cleaned

this has to be electrical...
unless the float jets jammes some times

minimaterix · 08-12-2008, 02:21 PM

Quote:

Originally Posted by turtlemann14

going up though the gears is bad at low speed it makes the engine run rich anyway...
thats why you keep it low in the gears and high in the rpm

why can't you let it idle with no load on the engine to check the plug?

you plug needs cleaned

this has to be electrical...
unless the float jets jammes some times

ill take the carb off tomoro morning as it is 10pm here in uk where are the float jets in the carb ill take pics of all the carb thx

08-12-2008, 01:02 PM	#52 (permalink)
tjscott2012 The Spam man Join Date: Nov 2007 Location: Hurley, Mo Posts: 4,867 iTrader: (0)	takes forever to start, gets hot, if i had to guess it would be cdi, but its beyond me __________________ 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

08-12-2008, 01:25 PM	#53 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	Well.... I guess I will jump back in here. Lean condition eh??? So anyways, THERE IS NO WAY TO DETERMINE FUEL MIXTURE ON THE LOW END BY LOOKING AT THE PLUG!!! So guys lets stop suggesting that as an option. The only thing you can tell from a plug check is top end mixture. And that is only done by making a high speed pass with the bike pinned and killing it while it is pinned while pulling the clutch in and stopping. However, we were not concerned with what was going on on the top end. He is having erratic problems that do not point to that. Now, you have distracted him from doing reasonable and legitimate tests such as cleaning out the carburetor and checking the electrical system over. These need to be done to rule out a vast majority of problems. Obviously the bike has been touched lots. From the fact that there is a large amount of suspension work done, says to me that the bike has been raced. Check the things over I recommended and we can go from there. If you do not do those things I we will not be able to progress with this problem. Also, what is this issue of overheating? Four strokes overheat if you are not going fast enough. Idling around will cause antifreeze to overflow. So what is the overheating issue? __________________ --'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

08-12-2008, 01:50 PM	#55 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	For cleaning out the carburetor you can just use some carb cleaner and spray it through all the openings. If you were riding in the mud, your bike will over heat no matter what. __________________ --'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

08-12-2008, 01:55 PM	#57 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	You either need to use something pressurized or you will have to disassemble everything and scrub it with a toothbrush. It is always soaking in gas so that will do no good unless you scrub 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

08-12-2008, 02:16 PM	#59 (permalink)
turtlemann14 Pro Mototips Member Join Date: Oct 2007 Location: West Virginia Posts: 3,990 iTrader: (0)	going up though the gears is bad at low speed it makes the engine run rich anyway... thats why you keep it low in the gears and high in the rpm why can't you let it idle with no load on the engine to check the plug? you plug needs cleaned this has to be electrical... unless the float jets jammes some times __________________ 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

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