Would like some opinions

My dad purchased a 2005 CRF250r yesterday with the understanding that the bike would not start and if he can not get it running the seller would refund the cash.


All that aside...  We were working through this yesterday and i'm fairly confident that the valves are to blame here, but would like another opinion.


The bike will not kick nor will it bump start.  When we attempted the bump start it would sound like it started to turn over but then would sputter out and die.  


As a precaution the plug is going to be replaced, but the current one shows good spark.  After kicking the bike a good 30 times removal of the plug shows a gas soaked plug tip.


Valve inspection shows both exhaust valves .011 and the left intake valve .004 with the right intake valve .001.


Knowing this valve is WAY out of spec, it it feasible to say that the bike would bump start if it is getting good spark?


Forgot to note, the bike has been sitting for 3 months.  We did not remove the carb but did drain the gas.


Thanks and sorry if this is not clear, i'm only 1/2 way through my 1st cup of coffee.

Edited by msw1382

I'm 99% sure it's the value's causing the problem.

My 05 eventually had the same starting issues as yours.

I bought it used for $2500 in April of 2010 and rode it hard for 7 months before I had the starting problem

Had my local bike shop first try shim's to get close to spec BUT warned me shiming may work for a week or a year. It lasted about a month.

I then had him send the head to get rebuilt (valve seat's, 4 new valve's etc) and changed the piston while the head was off.

I've got close to 140hr's and still running strong since the NOT cheap re-build

I believe it was exhaust valves but this was 3 year's ago.

Since I now have Clymer manual and if I had to this again today, I'd do everything but the head work myself and save $$$$$$$$ on the labour but depend's on your mechanical skill level.

Not sure what you paid the bike but get a quote from a bike shop. I guessing around a $1000.00, then figure out if you want to return to seller or keep.

As well, depending what the PO has done, there could be a new clutch ($400 approx.) chain and ring's ($200.00), tires etc etc etc in your future.

I run an hour meter and am meticulous about maintenance (log book etc) and figure I could get close to what I paid for it in 2010 but that's in MO..

Good luck

A combo of bad gas left over and out of spec valves could very well be your culprit here considering you have good spark. Depending on what the guy before you did to the bike before it stopped running maybe check out the timing chain make sure everything is timed correctly. 

We're mechanically inclined and have the service manual, this is just new territory.  


I think we may re-shim and see if this fires.  If not it will be a return.


Thanks for the thoughts!

The only thing re-shimming will do is letting it start, and delaying the problem. Do it right the first time. I have found that sometimes it's more cost effective to just buy a new head; I have been appraised up to $700 to rebuild a crf250r head, where you can buy a new oem head for $550. But what I have done is bought from fastheads, go to fastheads.com, they are expensive but well worth it, and they don't use oem stuff because they wear out way faster.

The only thing re-shimming will do is letting it start, and delaying the problem. Do it right the first time. I have found that sometimes it's more cost effective to just buy a new head; I have been appraised up to $700 to rebuild a crf250r head, where you can buy a new oem head for $550. But what I have done is bought from fastheads, go to fastheads.com, they are expensive but well worth it. And they dont use oem stuff because they know it wears out really fast

Take it back right now, it's got a worn out intake valve, very common. Unless they asking $1K for the bike as-is, it's not even remotely worth the hassle.

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