Triumphrat

Pcdabbler · 02-23-2008

You know what ? even if my Triumph needs work on the camchain at 20 or 30 thousand miles. It will still have outperformed almost EVERY honda I have ever owned, camchain wise ... (ok. except the VFR750, it had gears)

ricster · 02-24-2008

Quote:

Originally Posted by casperghst42

Ok, now I know what it is.

Looking at the exploded view of the camshart and camdrive on page 3.4. in the service manual it shows two rubber chain guides (the back one is the one which is used to tension the chain) and it is the front one which is the issue. According to my dealer it more or less the same as on the 955, even though the 1050 have a longer stoke (longer chain), and that causes the chain to be able to vibrate too much which can cause that it stretches over time. This have been redesigned - longer, thicker I don't know.

I do not know if it is something which is an issue with all 1050's (incl. the early ones). Mine is the 2 ABS on the road in The Netherlands (excl. the demos, which as far as I know did not have ABS until later 2005).

Also there was no problems at 20kkm, and the valves did not need adjustment either, this happened between 20kkm and 40kkm.

Casper

I copied your note and gave it to Don at Gengras in E. Hartford,CT. and he said he has not seen any of what we are discussing but will keep an eye out for any cases and let me know if anything comes in like the described events. He said his highest mileage 05-07 sprint st has been 18k.

Ricster

StevyR · 02-24-2008

casper

This gets more and more complex.

Firstly the bore on the 955 and 1050 models are the same at 79mm. The 1050 has a longer stroke by 6.4mm. Assuming none of the increased distance between crankshaft centre and camshaft centre is absorbed in the head design then the distance between centres and hence each leg of the cam chain is only 3.2 mm longer than on the 955. And assuming that the tensioner blades are the same items as your man speculates (which is probably not likely) this is hardly the cause of a catostrophic failure in the service life of the chain you are describing.

The differing versions of the failure you report that your man offers on seperate occasions are:
The cause is the "spanner", one can only assume you mean the adjuster or adjusted blade. Then he claims that the chain has grown in length by 10mm. This is a whole link, even for the more imaginative amongst us this takes some swallowing.
Then finally he blames the increase in stroke for destroying the chain by increasing the vibration it suffers. The chain is revolving in a flat plain under tension it is difficult to see what vibration it is that he is referring to.
The more you report on this subject, more is the suspicion that something is being covered up. After all until, as you have stated in one of your responses, the motor was stripped to check the valve clearances nothing was apparently wrong. Has said before this whole thing does not sound right, it warrants investigation.

Best regards

casperghst42 · 02-24-2008

I for one is starting to think that some strange is going on.... I've 8kkm to go for for the 60kkm service, I'll report back on what happens then - which should be around early June.

Casper

Quote:

Originally Posted by StevyR

casper

....
stated in one of your responses, the motor was stripped to check the valve clearances nothing was apparently wrong. Has said before this whole thing does not sound right, it warrants investigation.

Best regards

ST Kurt · 02-25-2008

Still at 62k km's the valve clearences on the 1050 have yet to be adjusted. The main difference to the 955 is Triumph have increased the service limit of the valve shim / bucket.

I have to say that I have started to notice a rattle from somewhere at around 2.5 to 3k rpm. Not sure what the cause is, but can feel the vibe in the bike.

btw, i flog my sprint every time i ride it. not sure why I treat my beloved bike like i stole it.

ExKellick · 02-25-2008

Hey ST Kurt, do you think you could change your avatar. You may not find it offensive but there are a number of us (especially with wives and kids to look over our shoulders) who don't share your sense of what is appropriate in humour.

This forum's policy as I understand it is supposed to be fairly friendly to all.

Thanks

LoVel · 02-25-2008

Just hit the report button and in comments tell the mods you find his avatar offensive. I also find it offensive as I'm sure several of the women on the site will. Never mind I will report it.

oldndumb · 02-25-2008

My thread display option is not to see avatars; now all this talk is making me rush to change it so I can see what you guys are talking about.

Pcdabbler · 02-25-2008

Back on thread, pure speculation and opinion ... dealer didn't back off/remove the tensioner when removing/refitting the cams and BROKE the font cam guide trying to re-thread the chain ... told customer the forward guide was broken up, poor design ... you get the picture ??

96sprintrydr · 03-01-2008

Quote:

Originally Posted by Pcdabbler

Back on thread, pure speculation and opinion ... dealer didn't back off/remove the tensioner when removing/refitting the cams and BROKE the font cam guide trying to re-thread the chain ... told customer the forward guide was broken up, poor design ... you get the picture ??

The blade on my 96 failed. The results were catastrophic engine failure. If the engine was designed to have enough head space between the valves and the pistons the damage would be minimal. Or a gear drive would be stronger way of doing business... I don't loose any sleep at night but the reality is, chains stretch and rub surfaces wear out. I will be replacing my 06 at 50k if this one makes it that far.