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[aviationfred]

The rear cam chain tension guide has alot of wear.


Fred

[racerrad8]

What does the tip of the tensioner look like?

That's usually a sign the tip is hardened or missing and there is no cushion.

Randy - RPM

[aviationfred]

What does the tip of the tensioner look like?

That's usually a sign the tip is hardened or missing and there is no cushion.

Randy - RPM

The 1st photo is the top end of the straight forward guide.
2nd photo is the top end of the curved rear guide.

Fred

[aviationfred]

The new parts were delivered yesterday. Installation of the new crankshaft and rod bearings went smoothly. Having read about the colored bearings, i always wondered what they looked like. You can see the different bearing colors. The rebuilt starter clutch dropped in with ease. The cases went together without any drama. Cross your fingers that we have no oil leaks. I highlighted 2 photos with arrows. The 1st is the location of the starter clutch oil nozzle. If you have a noisy starter chain... try installing the upgraded nozzle. This can be done by removing the alternator with the engine in the frame. The 2nd photo with an arrow shows the case bolt that is hidden by the oil pump. The oil pump has to be removed for access to the bolt.


Fred

[racerrad8]

Fred, what about that tensioner?

Randy - RPM

[aviationfred]

Fred, what about that tensioner?

Randy - RPM

The starter clutch tensioner went in without a hitch.


Fred

[racerrad8]

What does the tip of the tensioner look like?

That's usually a sign the tip is hardened or missing and there is no cushion.

Randy - RPM

The timing chain tensioner based on the cam guide wear.

The rubber tip of the timing chain tensioner

Randy - RPM

[mike g]

interesting pictures, what mileage had the motor done?

[aviationfred]

interesting pictures, what mileage had the motor done?

62,000, The first 31,000 was done over 22 years. The second 31,000 was done in 3 years.


Fred

[mike g]

wont start worrying yet, mines only done 18000, of which i've done only 7k since got it in 2006! (it's just for taking the mrs out). I had a new one in 88, which did about 50k on, with only an alternator failure, sold it after about 10 yrs, as I wasn't using it much after getting a fireblade around 96.

[aviationfred]

What does the tip of the tensioner look like?

That's usually a sign the tip is hardened or missing and there is no cushion.

Randy - RPM

The timing chain tensioner based on the cam guide wear.

The rubber tip of the timing chain tensioner

Randy - RPM

On the old cam chain guides, the round nub at the bottom of the aft guide was good and the little round nubs on the upper end of the forward guide were there.


Fred

[RPM - Robert]

This is a timing chain tensioner.......

Is the tip hardened or still pliable?

[aviationfred]

This is a timing chain tensioner.......

Is the tip hardened or still pliable?

It wasn't until I was putting the top end together today that I realized what part was being referenced. The rubber tip is shot and almost non existent. I have another one that is nearly new... I just have to find it.



Fred

[aviationfred]

Progress for the day. Gapped and installed the new rings on the pistons, installation of the cylinder block, the head and clutch basket. Torqued the head and called it a day. Cleaning and painting tomorrow.

Plans are Blacked out engine and bare aluminum Head.


Fred

[RPM - Robert]

A couple things for your next removal/install of the tensioner.

Make sure to remove the center bolt BEFORE you remove the tensioner. If you remove it you can see just how far it is extended and sort of gauge timing chain wear. If you do not remove it, the tensioner fully extends and you can gauge nothing.

When installing, make sure to remove the center bolt and retract the tensioner all the way. If you do not do this the tensioner will be all the way out and will have too much chain tension. Wearing everything out way faster than need be. Once the tensioner is installed the proper side up. Then install the springs and center bolt.