Honda CRF250R...trouble!

1against · 10-01-2006, 10:19 AM

I have a 05 crf250r, and for some reason it does not want to kick-start. If I roll it down a hill, and pop the clutch it starts right up, and runs fine. Something that I noticed it does now, is when I try to kick-start it, it likes to back fire, and it even shot a flame out the muffler once. I would say that out of 50 tries it may start once, and I have to keep the throttle open a little or it will die out. Just for some history on the bike. It has never Idled that great, but that was never a real big issue to me. Now that It dose not want to kick-start, you can see how that opinion has changed. I have already put a new spark-plug in it, and have checked the fuel lines, and drained the carburetor. Need help, please!

dirtbikenut · 10-01-2006, 02:45 PM

1against,
I looks like, to me that you should check your valve clearances. If one of the exhaust valves is too tight, it will not close all the way and will be held open piston comes up into the the firing stroke. This will also affect the idling since your compression is down slightly. You may or may not notice your compression being a little low due Hondas decompression mechanism.
Also, be sure to check the decompression mechanism's clearance also. If it is too tight it will not let the exhaust valves close all the way.
How many hours on the bike?

tigmaster · 02-06-2007, 09:22 PM

ya, dirtbikenut has a pretty good point there, check valve clearances. but as far as the honda decompression mechanism goes, it actually barely gets used, it doesnt work the way it seems it should. i would explain but it takes lots of time to do.

DAVO · 11-15-2007, 05:49 PM

check yr shims aswell a friend of mine as got same bike as u but 04 his bike is same as yrs hard 2 start bike shops hav said down 2 shims best of look

tigmaster · 11-15-2007, 05:57 PM

this thread is really old. lol.

10-01-2006, 10:19 AM	#1 (permalink)
1against C Rider Join Date: Oct 2006 Posts: 1 iTrader: (0)	Honda CRF250R...trouble! I have a 05 crf250r, and for some reason it does not want to kick-start. If I roll it down a hill, and pop the clutch it starts right up, and runs fine. Something that I noticed it does now, is when I try to kick-start it, it likes to back fire, and it even shot a flame out the muffler once. I would say that out of 50 tries it may start once, and I have to keep the throttle open a little or it will die out. Just for some history on the bike. It has never Idled that great, but that was never a real big issue to me. Now that It dose not want to kick-start, you can see how that opinion has changed. I have already put a new spark-plug in it, and have checked the fuel lines, and drained the carburetor. Need help, please!

02-06-2007, 09:22 PM	#3 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,659 iTrader: (1)	ya, dirtbikenut has a pretty good point there, check valve clearances. but as far as the honda decompression mechanism goes, it actually barely gets used, it doesnt work the way it seems it should. i would explain but it takes lots of time to do. __________________ --'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

11-15-2007, 05:57 PM	#5 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,659 iTrader: (1)	this thread is really old. lol. __________________ --'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

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Pro Moto Billet 2006 Honda CRF 250R Dream Ride Parts List	Mototips	DirtRider news	0	09-22-2006 06:14 PM
Honda Motorcycles Announces No More Two-Stroke Engines	Mototips	DirtRider news	0	09-11-2006 12:30 PM
Honda Announces No More Two-Strokes	Mototips	DirtRider news	0	09-08-2006 06:23 PM
BBR Motorsports Custom Honda CRF 50 David Bailey Motocross Replica Mini for Auction	Mototips	DirtRider news	0	08-24-2006 06:11 PM
2002 Honda Xr200	Mototips	Stolen Bikes in Canada	0	08-20-2006 03:42 AM

10-01-2006, 02:45 PM	#2 (permalink)
dirtbikenut C Rider Join Date: Aug 2006 Posts: 43 iTrader: (0)	1against, I looks like, to me that you should check your valve clearances. If one of the exhaust valves is too tight, it will not close all the way and will be held open piston comes up into the the firing stroke. This will also affect the idling since your compression is down slightly. You may or may not notice your compression being a little low due Hondas decompression mechanism. Also, be sure to check the decompression mechanism's clearance also. If it is too tight it will not let the exhaust valves close all the way. How many hours on the bike?

11-15-2007, 05:49 PM	#4 (permalink)
DAVO C Rider Join Date: Nov 2007 Location: manchester.uk Posts: 161 iTrader: (0)	check yr shims aswell a friend of mine as got same bike as u but 04 his bike is same as yrs hard 2 start bike shops hav said down 2 shims best of look

Remove advertisements Sponsored links