Broken Crank Z155

[spinnahonda]

Ha there...
Has anybody else had catastrophic Engine failure e,g ( BROKEN CRANK)
on a Z155
Im really really "disappointed" with DHZ the lack of product responsability
This engine was fitted to a registered Honda Cub C70 it was ridden in 60 to
80km zones.. Not Raced, Not Revved hard, Serviced.

No Warranty.. None. Nothing


Oh well what goes around comes around it just might take awhile DHZ

 

[pbk]

Ha there...
Has anybody else had catastrophic Engine failure e,g ( BROKEN CRANK)
on a Z155
Im really really "disappointed" with DHZ the lack of product responsability
This engine was fitted to a registered Honda Cub C70 it was ridden in 60 to
80km zones.. Not Raced, Not Revved hard, Serviced.

No Warranty.. None. Nothing


Oh well what goes around comes around it just might take awhile DHZ

you seem smart...

companies wont offer warranty on an engine that has been ridden and you also havent stated how old the engine is im guessing older than 3 months

and cranks dont just break

do you have some photos of the "broken crank"

 

[hman]

spinnahonda (not thrashed? i think your user name says it all). the engines are for offroad use only. these engines were not designed for the road which will place a lot more strain on your engine internals. how old is the engine? what gearing? what sort of set up and servicing do you do? which workshop fitted it? i would be more inclined to blame the mechanic that fitted it knowing what it was for. dont blame the engine supplier as i am sure if it was an issue inside a reasonable time frame dhz and the mechanic would work something out for you.

 

[sean01]

yep if it was within the warranty period then ken would change it with no drama's but since he isnt then i guess there's more to the story then your letting on.

have you pulled the engine down to verify its actually a broken crank shaft? and if so where exactly did it break?
i have never heard one breaking so its a little hard to think its a warranty issue..
i have heard and seen of slinger's breaking and making a nasty noise like a broken crank..

lol this actually reminds me of a dude in the states with the same engine and bike jumping up and down about not being about to keep a z155 running... turned out it was a massive rider/user error..

 

[The_GDFP]

While I agree that the majority of importers can't warranty a $500 engine to do more than initially run correctly, it's nonsense to blame the rider, sans facts. I see the same thing with kicker gears and pre-needle right side cases. You should not have to cross the toes on your left foot, face Mecca, sacrifice a goat, and get careful instructions from your toque to start a freaking mini.

Cranks are rarely broken by improper riding. Even over rev should only cause issue if the flywheel's loose or out of balance. Might not have the Paul Harvey on the break down, though. It's in a street bike, so likely the stator and flywheel have been swapped, or at least off. Page 2?

As for the fellow Stateside, he was sold an engine WAY wrong for his application. Fortunately it did NOT have the close-ratio transmission it had been advertised on the web site for a year to contain, or it would have been even more wrong for his use. Admittedly, the owner has created his share of the troubles with said Z155, but there were misrepresentations of the equipment and repairs from the other side of the dollar exchange, as well. :bolt:

 

[fusedminis]

Here is something else to ponder, I bought I a 155z from DHZ for my current build and wasnt able to start it for over 5 months due to still chasing all the parts, now I knew the warranty would only last for 3 months, but after 4 months when I finally looked at the engine, in my opinion it had been run, not just the "test" start but actually used in a bike. Some of the signs were heavy carbon build up on the spark plug and exhaust port, and there where a couple of the accessories that didnt look new. Since it was outside the warranty "period" and I was dumb enough not to notice before I didnt really bother, however I feel that this could be important information for the OP.

I do agree with FPM with respect to many importers not being able to warrant engines, however DHZ is one of the biggest, if not the biggest in AUS at the moment so if he cant then nobody should be able to, and I am sure some of the smaller companies would stand behind the products they are pushing.

Just fuel for thought

 

[westy465]

another point I would like to add. If I buy a japanese motocrosser ( which I have many) start it, then all warranty it void. now I had an issue with the chroming on my shock, where it was flaking off. yamaha said it was because a rock could have hit it on my drive home from the dealer, or when I ran it in rocks could have hit the chrome. no warranty. its a bloody new bike. but as soon as you walk it out of the store, no warranty. its all in the fine print.

 

[MiniFighter]

another point I would like to add. If I buy a japanese motocrosser ( which I have many) start it, then all warranty it void. now I had an issue with the chroming on my shock, where it was flaking off. yamaha said it was because a rock could have hit it on my drive home from the dealer, or when I ran it in rocks could have hit the chrome. no warranty. its a bloody new bike. but as soon as you walk it out of the store, no warranty. its all in the fine print.

ive had a simlar issue when i bought my 426. The dealer was so good, when i arrived to pick it up he had it loaded in his workshop ute with all the accesories i picked and everything..drove about 3kms to my house only to find the ute liner covered in oil.
Fork seals had blown/leaked when it was tied down.

took it straight back..no warranty.

i had to pay for the seals and was lucky enough (after a complaint to YMAF) the dealer covered the labour.

This was my 4th brand new bike with this dealer..no such thing as loyalty when $ are involved.

 

[sean01]

well while all the above info is all relevant we still don't know the whole story..

the finer details need to be expressed first..
and then there's things like if it has ever run low on oil or used a lot for compression braking or been run for long periods of time with an over tensioned chain..
all these things factor his problem..plus more

and yeah TBO ken gives more warranty then the local jap bike shops unless you purchase a special warranty (which is worth sht most of the time)

now the other thing is this guy could be calling it a broken crank when in fact it could only be a broken slinger or even a loose slinger nut. gee even a broken case can cause an issue like this. (we dont know if he has mechanical knowledge or even knows a spanner from a shifter)

then if it did have a broken crank you would need to check the balance of the magneto and also check it for out of round... just too many things to factor the reason...

also he hasnt mentioned if there's any engine mods or upgrades..

but id have to disagree about riders not being at fault... if you dont start the engine properly then your leaving yourself wide open for drama's..
and also from personal experience my yx160 bent a crank shaft which was caused by stripping all the teeth off the clutch basket.. i sure as sht cant ring the retailer and ask for a refund cause it was definitely caused by me.. too heavy on the clutch and basically riding like you stole it attitude.

i recon this thread this a waste of time anyways because your probly not going to hear the full story or see the evidence to back it up (full detailed pic's of the damage).
i think this thread is simply just a rant that old mate needed to get out of his system cause he hasnt logged back in since he posted the thread..

 

[spinnahonda]

Sum details

Ha Guys.. The engine was fitted by experienced motorcycle shop who has been in the industry building roadrace engines ect for over 20 years

I havent posted this to change anyones mind or rubbish anyone because i have way better things to do. I have never be motivated to go on-line but the lack of care that this company had was beyond my understanding.

Just for all the devil advocates out there i have enough knowledge and mechanical empathy to know when i didnt get value for money. irrelevant of price..

This engine was used in low pressure situations..

Never again Chinese.. Best of luck everyone

Go the singles!!!

 

[pbk]

Ha Guys.. The engine was fitted by experienced motorcycle shop who has been in the industry building roadrace engines ect for over 20 years

I havent posted this to change anyones mind or rubbish anyone because i have way better things to do. I have never be motivated to go on-line but the lack of care that this company had was beyond my understanding.

Just for all the devil advocates out there i have enough knowledge and mechanical empathy to know when i didnt get value for money. irrelevant of price..

This engine was used in low pressure situations..

Never again Chinese.. Best of luck everyone

Go the singles!!!

I dont know wether you realised but the engine you bought is chinese, Honda wont know squat about them and if they are good for road engines

so you still expect us to believe what you originally said 100% with out any photos or anything to show the damage?

and i find it funny how you say irrelevant of price, well it is for 600 bucks its pretty dam cheap and has stated above if your "broken crank" broke within a fair time period of you buying your engine Ken would have replaced it

did you take your engine to a shop to be diagnosed or have you diagnosed whats broken yourself?

 

[TDR]

Mate i understand what your getting on about but just because its "Chinese" doesn't mean it wont happen to a japan bike...
yes japan may have better quality control but doesn't mean there engines are 100% bullet proof either
and I'm not trying to put your mechanical knowledge down but not everything lasts for ever
so all I'm saying is by you having 1 troubled experience with a pit bike doesn't mean you have to say never again because think about it the majority of people on this website have minimal problems with these engines and look yes you have your few faulty engines pulled of the assembly line but its not just by Chinese pit bike company's it's also with cars boats everything just take that into mind because its not just china bikes that have problems its every thing. because all products have there ups and downs we just have to learn to live with that...

 

[TDR]

who me or the guy with the "broken crank"
Lol

 

[DHZ_XR8cing]

Id say a couple of loose nuts caused this problem. And im talking about the ones in the engine.hehe
The clutch nut and the one that holds the drive gears on the crank would of come loose.