some days

[carl winterMember]

some days you just wonder.crf come up for a top end rebuild and had ten days to my next pony express so do the rite thing order parts at the start of the week expect to grt them by week end and get valves seated on friday and put the rest together friday night ready to run in on sat ride sun and everything ready to race folowing weekend.sounds simple a no f&$king way.pic head up fri afternoon thinking every thing s good get home set up ready to put her back together piston in putting on base gaskett nothing lines up grab head gaskett no way so check piston 5mm to small not happy .oh well set the shims on the valves go to bolt cam down and it wont sit in so futher in spection pull valves out they are 5mm to long you could push the springs in with your little finger so how does a mechanic miss that so just wasted a whole weekend now wont get parts back till wedsday and have to try and run bike in for pony on weekend plus work SOME DAYS

[anthony tramontanoMember]

wow that has got to suck

[Aaron WildeMember]

You have had your CRF for how long and you are rebuilding it ??? Where have I heard this story before. :unsure: Back in the XR days when you thought of Honda you thought strong and reliable. We have Honda stationary engines that have done so many hours in horrific conditions with minimal servicing and they still wont die. We would not think of buying another product just because of past experiences.Yes these are ag products and hardly similar to a high performance motorbike engines. Surely all these CRF engine failures cant be just because of poor maintenance. Unless people buy Honda’s because like me in the past you hardly had to service them. Whats the story??

[GregMember]

CRFs require above average service care Aaron true as a Honda nut it pains me to say. I know of a CRF450 with over 400 hrs on it and never had the valves replaced but the guy as a very special way that he does his filters that works. Mick and I know of a CRF150 with I think it was 350 hrs the same. I know of many a CRF that has had the valves replaced under 50 hrs. It is air filter related, I was told at GHR once that their motard bikes would do a seasons racing and practice and the valves wouldn’t move (no dust) and they get the guts rev’ed out of them. Yet one dusty two day enduro and they may have the reshim.

I don’t think its as bad as it used to be on older models. You are right about the industrial engine eh can’t kill them with a stick :laugh:

TB

[Aaron WildeMember]

Nice to see that the engines are tough but it is the dust destroying them. Should get that bloke with the CRF at 400 hrs to do a “how to” on airfilter servicing. Sounds like we could all do with some schooling if he sees those results.

[GregMember]

He won’t cause he can’t use a computer :blink: True he failed our Insite course cause he couldnt use a computer can’t even turn it on.

Smart bush taught guy though, remind be and I will do a post on his method I have shared it verbally with others before.

TB

[carl winterMember]

Yeah i should of said I have a 250 so 50 hrs is prety much standard for a 250 for a piston kit but a pain in the arse having to do valves just lucky that they are cheap but as far as dust goes that is not my problem i fit clean filter every time I ride even if it’s not that dirty and i youse the same method as I have on my wr450 and it’s never had it’s valves done only checked and were still in toleranc when it had a full rebuild for peace of mind at 240hrs.i say honda just has shit valves

[anthony tramontanoMember]

i have the 08 crf450x and have not had any issues yet with 4600kms on the clock
air filter every ride and if its dusty i use filter skins (chux cloth)
engine oil every 500
gearbox 1000
poor maintinence will stuff the valves within 1000kms every time

[Author]

Posts