I have a bit of a rattle which may be a slack cam chain (?)
Motor has done 35,000 miles and I have not touched the adjuster.
The manual says to remove the cam box cover to check the tension, timing marks etc after re-fitting the adjuster mechanism.
Is this really necessary or just the manual being a bit hyper-cautious ??
Any advice welcome.
Cam chain tensioner
Moderators: trixynut, Mincehead, dicky, phuk72, Jak, Kevtrx849
-
- TRX-Enthusiast
- Posts: 973
- Joined: Thu Sep 21, 2006 6:31 pm
- Location: Oxon/Bucks
Cam chain tensioner
Rubber side down, Red side up is my preferred riding style.
-
- Site Sponsor
- Posts: 6809
- Joined: Thu Aug 28, 2008 9:19 am
- Location: Brisbane,Australia
Re: Cam chain tensioner
Once you release the tension on the chain by removing the tensioner, it’s easy for a valve that has been depressed by cam to rebound and push the cam around and effectively change your cam timing because there is no tension on the chains to keep things where they should be.
Due to the nature of the 270 crank there is pretty well always an inlet or exhaust can or both with tension from the valve spring acting on it throughout the 360* rotation of the crank
Due to the nature of the 270 crank there is pretty well always an inlet or exhaust can or both with tension from the valve spring acting on it throughout the 360* rotation of the crank
laughter is the best medicine
-
- TRX-Enthusiast
- Posts: 973
- Joined: Thu Sep 21, 2006 6:31 pm
- Location: Oxon/Bucks
- Snod Blatter
- TRX-Enthusiast
- Posts: 405
- Joined: Sun Sep 16, 2012 8:40 am
- Location: Worksop, UK
Re: Cam chain tensioner
They do rattle a bit, I used to worry about my cam chain until I checked the valve clearances and opened them out a bit more.. Then it rattled even louder! Combined with the rumbly clutch it sounds like a bag of nails but doesn't seem to get any worse, I don't worry about it any more
And yes, the chain does always want to to skip around the cam sprockets when you let the tensioner off. I mark the chain and sprockets with a bit of Tipp-Ex first, then let the tensioner off and let it all do its thing.. Then just line the chain back up with the marks for reassembly. Turn the motor round by hand after though, carefully!
And yes, the chain does always want to to skip around the cam sprockets when you let the tensioner off. I mark the chain and sprockets with a bit of Tipp-Ex first, then let the tensioner off and let it all do its thing.. Then just line the chain back up with the marks for reassembly. Turn the motor round by hand after though, carefully!
'95 4NX with K&N filter, Motad Venom cans, YSS PD valves, Ohlins fork springs, 530 C+S, Green CDI, 11/16 radial master cylinder, +30mm jack up dog bones. Enjoyable money pit.
- PrfctChaos
- TRX-Enthusiast
- Posts: 73
- Joined: Wed Nov 06, 2013 2:54 am
- Location: Perth, Australia
Re: Cam chain tensioner
I think I cabletied my chain to the camgears last time I was reinstalling the cams, to save having to try to hold the 2 cams in place. But might be thinking of another bike.... Anyways, worth considering using 2 cableties if you do feel like replacing the tensioner.
1996 TRX, Front end from a 2006 GSXR 750, Seat off a 2012 Triumph street triple. TDMR carbs, Laser cans, Perreli Rosso Supercorsas.