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Starter Clutch Failure

Started by aviationfred, December 28, 2020, 12:34:10 AM

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aviationfred

The rear cam chain tension guide has alot of wear.


Fred
I'm not the fastest FJ rider, I am 'half-fast', the fastest slow guy....

Current
2008 VFR800 RC46 Vtec
1996 VFR750 RC36/2
1990 FJ1300 (1297cc) Casper
1990 VFR750 RC36/1 Minnie
1989 FJ1200 Lazarus, the Streetfighter Project
1985 VF500F RC31 Interceptor

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
Randy - RPM

aviationfred

Quote from: racerrad8 on January 06, 2021, 05:32:21 PM
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
I'm not the fastest FJ rider, I am 'half-fast', the fastest slow guy....

Current
2008 VFR800 RC46 Vtec
1996 VFR750 RC36/2
1990 FJ1300 (1297cc) Casper
1990 VFR750 RC36/1 Minnie
1989 FJ1200 Lazarus, the Streetfighter Project
1985 VF500F RC31 Interceptor

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
I'm not the fastest FJ rider, I am 'half-fast', the fastest slow guy....

Current
2008 VFR800 RC46 Vtec
1996 VFR750 RC36/2
1990 FJ1300 (1297cc) Casper
1990 VFR750 RC36/1 Minnie
1989 FJ1200 Lazarus, the Streetfighter Project
1985 VF500F RC31 Interceptor

racerrad8

Fred, what about that tensioner?

Randy - RPM
Randy - RPM

aviationfred

Quote from: racerrad8 on January 10, 2021, 07:16:23 PM
Fred, what about that tensioner?

Randy - RPM

The starter clutch tensioner went in without a hitch.


Fred
I'm not the fastest FJ rider, I am 'half-fast', the fastest slow guy....

Current
2008 VFR800 RC46 Vtec
1996 VFR750 RC36/2
1990 FJ1300 (1297cc) Casper
1990 VFR750 RC36/1 Minnie
1989 FJ1200 Lazarus, the Streetfighter Project
1985 VF500F RC31 Interceptor

racerrad8

Quote from: racerrad8 on January 06, 2021, 05:32:21 PM
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 :Facepalm:

Randy - RPM
Randy - RPM

mike g

interesting pictures, what mileage had the motor done?

aviationfred

Quote from: mike g on January 11, 2021, 07:53:14 AM
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
I'm not the fastest FJ rider, I am 'half-fast', the fastest slow guy....

Current
2008 VFR800 RC46 Vtec
1996 VFR750 RC36/2
1990 FJ1300 (1297cc) Casper
1990 VFR750 RC36/1 Minnie
1989 FJ1200 Lazarus, the Streetfighter Project
1985 VF500F RC31 Interceptor

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

Quote from: racerrad8 on January 10, 2021, 10:58:44 PM
Quote from: racerrad8 on January 06, 2021, 05:32:21 PM
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 :Facepalm:

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
I'm not the fastest FJ rider, I am 'half-fast', the fastest slow guy....

Current
2008 VFR800 RC46 Vtec
1996 VFR750 RC36/2
1990 FJ1300 (1297cc) Casper
1990 VFR750 RC36/1 Minnie
1989 FJ1200 Lazarus, the Streetfighter Project
1985 VF500F RC31 Interceptor

RPM - Robert

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

Is the tip hardened or still pliable?

aviationfred

Quote from: RPM - Robert on January 12, 2021, 01:50:26 PM
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
I'm not the fastest FJ rider, I am 'half-fast', the fastest slow guy....

Current
2008 VFR800 RC46 Vtec
1996 VFR750 RC36/2
1990 FJ1300 (1297cc) Casper
1990 VFR750 RC36/1 Minnie
1989 FJ1200 Lazarus, the Streetfighter Project
1985 VF500F RC31 Interceptor

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
I'm not the fastest FJ rider, I am 'half-fast', the fastest slow guy....

Current
2008 VFR800 RC46 Vtec
1996 VFR750 RC36/2
1990 FJ1300 (1297cc) Casper
1990 VFR750 RC36/1 Minnie
1989 FJ1200 Lazarus, the Streetfighter Project
1985 VF500F RC31 Interceptor

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.