Quote from: matt.e on April 22, 2011, 05:58:44 PM
Okay cam has a slight bend in it Yay!!! That would of caused the belt to run weird on the pulley. If I decide to keep it, I'll get the parts and i'll get them fitted for free. The offer was given from him to pay for the whole lot but that isn't fair on him. I would only do that if it was from direct fault of that persons actions etc. I have confidence in this mechanic and he came through in everyway. I got an answer what caused and it makes perfect sense. Thanks everyone with your suggestions on what it could be or to look for but most of all thanks to..................for the real old fashioned service.

you said in your original post that it's been "cammed up", if you bought them new you can go back to them for some sort of help with the fix, if they were 2nd hand you're screwed i guess, god knows how you bend a cam anyway!
can you put the std cams back in it?

paul.

cam bent? timing belt put on too tight?

I reckon the cam pulley coming off would bend the cam alright!! 

If I havew to replace mine NEW nuts will be used for sure as a mayyet of course!! 

The 750 has done 85,000k so far and I reckon the pulleys are the originals and work well still!! 

What is the workshop data on replacement of these?? (Interval, time frame??) anyone know?? 

Yep getting paranoid now , heh!! 

Probably a good idea to shoot Chris a message.

Good to hear that you now know the answer to your problem Mat.







                                  Mmick

Quote from: matt.e on April 21, 2011, 05:00:53 PMBefore anyone says it, no it's not a recurring problem because the first time it was the pulley that come away causing the belt to make a mess but this time all pulleys were intact and spun freely(except the one with the damaged valves.) The belt still had it's teeth barr the ends of the belt that were now stretched, a little melted and a mangled mess. In some areas the back of the belt only held the teeth on by this fabric looking material and no actual rubber belt was there.

(emphasis mine) Matt, there's the root of the problem. The cam stopped, which is how the belt was broken. If the belt were to somehow fail, none of the teeth would be missing or melted, it would break in a similar manner as the belts I managed to break in our youtube "jackass" video.

If at all possible, I would really like to get that damaged belt. I want to send it to engineering (along with a link to this thread) so I can get their thoughts and observations about the whole situation.

Quote from: matt.e on April 22, 2011, 05:58:44 PM
Okay cam has a slight bend in it Yay!!! That would of caused the belt to run weird on the pulley. If I decide to keep it, I'll get the parts and i'll get them fitted for free. The offer was given from him to pay for the whole lot but that isn't fair on him. I would only do that if it was from direct fault of that persons actions etc. I have confidence in this mechanic and he came through in everyway. I got an answer what caused and it makes perfect sense. Thanks everyone with your suggestions on what it could be or to look for but most of all thanks to..................for the real old fashioned service.

I am very glad that a solution as well as some financial help has been found. I have never heard of a bent cam before. However, there was a time (before working on other peoples' bikes) that I would re-use the cam nuts. Never again! They can only be used once. Upon analysis, a fresh one versus a used one can shift the cam's timing 2 degrees! When degreeing cams, I used old nuts for all the wind-up, set it up 2 degrees off using a new nut, then double check.

Quote from: mattyvas on April 23, 2011, 12:38:56 AM
So it's also nice to know that it wasn't a belt failure and particularly a CA belt failure as there are many of us who use the products and have never had any issues. I am sure Chris will also be happy to know that his product was not at fault.
...
Have no fear Chris your products reputation is still intact.

Yes, I literally would have gotten ill to my stomach and lost sleep over this had I read this thread during the time between Matt's posts.

Quote from: dragonworld on April 23, 2011, 06:54:24 PM
The 750 has done 85,000k so far and I reckon the pulleys are the originals and work well still!!  What is the workshop data on replacement of these?? (Interval, time frame??) anyone know??  Yep getting paranoid now , heh!! 

I don't know the interval, however, unless noticeably worn down, I would not change the timing belt sprockets on my own Ducati. And I do the same for my drive-chain sprockets. As I advise customers: I have no reason to recommend procedures other than Ducati's official status quo with regard to the timing belts or their sprockets.

Phew... epic. I need a beer.

Thankfully we see light at the end of the tunnel, and I think it was good of Chris to get involved, hopefully matt.e still has the belt and it would be interesting to hear what Chris's engineers say. Phew!!







                                      Mmick

sorry to see anyone have issues with their bike, glad to see it's been diagnosed and is hopefully on the mend.
There is an upside to this saga though, hopefully new members who don't know who chris and cacycleworks are will catch on and support a business that goes above and beyond for all their customers. I've been a happy customer for years and can't recommend them highly enough.
paul.

Hi guys, just got back from my easter break. Hey Chris I can get the belts sent to you when I meet up.  I think I'm going to sell the duke as I have just poured too much money into it. If I didn't have any other projects I would be happy to keep doing it. Every time I save up a lump sum to spend on my other projects, the duke decides to have a hissy fit and drain my account. Oh I dream of that money tree and huge warehouse full of toys. I am up for adoption Mr Leno.

Hey, what is the feedback on these stainless steel valves on ebay usa. I've read some reviews and don't seem bad but don't understand why they are so cheap as opposed to OEM. Any feedback or ideas?

@matt.e : Thanks, I look forward to getting the belts. And I know all about when one of my bikes becomes jealous of something else I'm spending time or money on!!!!

IMHO, I prefer to avoid stainless valves as the groove for the closing shim keeper gets beaten up badly. Valves need to be adjusted as soon as every 500 miles depending on RPMs. Also, when the groove gets hammered, a lip forms on the edge of it which traps the closing shim on the valve.    I consider MBP valve retainers to be mandatory addition with stainless steel valves.

Thanks,
Chris

Quote from: loony888 on April 30, 2011, 01:25:19 AM
sorry to see anyone have issues with their bike, glad to see it's been diagnosed and is hopefully on the mend.
There is an upside to this saga though, hopefully new members who don't know who chris and cacycleworks are will catch on and support a business that goes above and beyond for all their customers. I've been a happy customer for years and can't recommend them highly enough.
paul.

Ditto 

And the M&M's that Candice puts in the parcels are tasty!! Dare I say "Candy from Candi" ?? 

Quote from: dragonworld on May 01, 2011, 03:29:11 AM



Ditto 

And the M&M's that Candice puts in the parcels are tasty!! Dare I say "Candy from Candi" ?? 

Aww I am glad you enjoyed the M&M's Take Care!

-Candice

Hey guys just a quick note to say I'm selling the Duke to regain some of my losses and help me get back on my feet. It was pretty much sold but the person has too many bike projects and when I called to finalise he decided he can't have another. Bit of a bugger because I thought I'd be getting money coming in so I hit the credit card up for things that were really needed for the Katana. Another lesson I've been dealt.

Anyway it's a 1998 748  (Aftermarket 916 single seater cosmetics) the one with the white face plate and white going across the back cowl.
I have every receipt and service papers. You'll see I always looked after it.
It's done going by memory(still in the shop) 79000k's but always maintained
Parts needed-
4 just to be safe inlet valves
4 inlet valve guides
2 cam belts
cams and chip  as mentioned in a previous post 1 cam is apparently has a hare's dick tiny bend. Because these cams were not stock they'll all need to be replaced with a matching chip.
Not sure if the new head gasket can be used again.

I know this isn't the right section to sell a bike but I just wanted people to follow the story. If you are serious or no of anyone that could be drop me a line and we'll get more in depth.
I've been getting all my parts from the U.S and the parts needed would come around $800.00 but that's with 2nd hand cams all else is new OEM parts. If you know how to work on Ducati's this will turn out to be a great bargain. Even using a good mechanic this would still be a bargain Duke. I'm selling the bike for $4000ono and I'm in Sydney. I am going to list it on ebay and other places soon at that price but really don't want to have to deal with idiots who no nothing.