A bit of a cleanup (down under)

[aviationfred]

As I crawl out from under Pat's bus......

Yes, be very mindful when installing the wiseco wrist pin clips. They seem to be made of spring steel and will definitely launch themselves if you let one get away. OEM Yamaha clips are NOT a suitable substitute.


Fred

[racerrad8]

Everything is in stock...

Wrist Pin Parts

Randy - RPM

[FJools]

Latest update...............

in between other projects and injuries I have managed to get the top end together ready to fit the cams.

while installing the valve lifters/buckets I double checked the shim sizes as these will all need to be re adjusted after the head service.

The only worry I have now is that the new cam chain is too short...............before I panic I need to double check its not bunched up, but on initial inspection
with the exhaust cam sitting on its journals there is no way the inlet cam is going to take up its correct location.

At this point I stopped and went for a cuppa, but then sat watching the Moto GP from Sepang and never returned to the workshop.
I find a few days away allows me to read and absorb the process hopefully finding something that will assist me.

[oldktmdude]

   Jools, check that the rear camchain guide is located in the correct place. A recent rebuild, that a mate of mine did, ended up with the same problem. It turned out that he hadn't fitted the rear guide in the proper place.
Regards, Pete.
P.S See you at the end of November.   

[Troyskie]

On my engine assembly attempt # 43 the cam chain certainly did bunch at the tensioner at one point, but lifting the cam shaft off again and having a back & forth with the cam chain released it.

Note, yes, I did screw up the assembly sequence that time as well.

[FJools]

   Jools, check that the rear camchain guide is located in the correct place. A recent rebuild, that a mate of mine did, ended up with the same problem. It turned out that he hadn't fitted the rear guide in the proper place.
Regards, Pete.
P.S See you at the end of November.   

Thanks Pete, I'll double check. I'm sure the chain is correct for length.

[oldktmdude]

   156 links if I remember correctly. And NO you can't use this for an excuse to miss the Manshed weekend!
   Regards, Pete. 

[FJools]

I just remembered I have the carbs to clean & set up yet too...................

[FJools]

   156 links if I remember correctly. And NO you can't use this for an excuse to miss the Manshed weekend!
   Regards, Pete. 

Well I found the problem the "new chain" part number 94591-05156 is 6 links shorter than the one I took out......................

So its either a full strip to replace or split the chain and put a link in. either way I need to order a new chain FFS.

My problem is - is the part number correct and if so why is the one I got incorrect.....................

Tripped up again by those @##$# demons !!

[ribbert]

   156 links if I remember correctly. And NO you can't use this for an excuse to miss the Manshed weekend!
   Regards, Pete. 

Well I found the problem the "new chain" part number 94591-05156 is 6 links shorter than the one I took out......................

So its either a full strip to replace or split the chain and put a link in. either way I need to order a new chain FFS.

My problem is - is the part number correct and if so why is the one I got incorrect.....................

Tripped up again by those @##$# demons !!

That really is rotten luck Jools. If you build enough engines you eventually have strip one down again, I've had to do it and it's heartbreaking. I suppose the fact that's it not a quad cam V8 already back in the car in no comfort to you at the moment.

If it was mine, I'd be looking into a spit chain, the rest of the chain is only riveted links anyway and it's under constant and consistant load - what could go wrong?

Noel

[aviationfred]

Possibly an order from RPM is called for. I have never heard of someone ordering a part as critical as this and having the wrong part show up.

Here is the direct link for the cam timing chain

http://rpmracingca.com/proddetail.asp?prod=Engine%3A94591-05156&cat=39

According to Partzilla the part number you ordered is correct. This link shows that it is used for all of the FJ1100/1200 years.

http://www.partzilla.com/parts/detail/yamaha/YP-94591-05156-00.html

Fred

[racerrad8]

Are you sure the chain is not bunched at the bottom of the crankshaft?

Remove the cams and front chain guide. Hold up moderate upward tension of the chain with your hand. Rotate the crankshaft and see if the missing links don't magically show up. The chain can bunch at the bottom. Wwhen you just lift the chain by hand it will engage the crank and leave loose links hanging underneath. Turning the crank will release them.

After that you need to keep the tension on the chain so they cant fall back down there. Also. make sure your front chain guide is not bent at the bottom. It shuld have only a nice radius to it. If it is bent it will be down at the bottom and have a significant curve there.


That is the correct part number for the timing chain.

Randy - RPM

[FJools]

Possibly an order from RPM is called for. I have never heard of someone ordering a part as critical as this and having the wrong part show up.

Here is the direct link for the cam timing chain

http://rpmracingca.com/proddetail.asp?prod=Engine%3A94591-05156&cat=39

According to Partzilla the part number you ordered is correct. This link shows that it is used for all of the FJ1100/1200 years.

http://www.partzilla.com/parts/detail/yamaha/YP-94591-05156-00.html

Fred

That what I assumed Fred. It came from Japan and is obviously unused. I can only assume someone along the line has put the wrong chain in the wrong packaging, probably not from the factory, and i'm the one holding the baby !

I think I'll stick to 2 strokes...!!

[FJools]

Are you sure the chain is not bunched at the bottom of the crankshaft?

Remove the cams and front chain guide. Hold up moderate upward tension of the chain with your hand. Rotate the crankshaft and see if the missing links don't magically show up. The chain can bunch at the bottom. Wwhen you just lift the chain by hand it will engage the crank and leave loose links hanging underneath. Turning the crank will release them.

After that you need to keep the tension on the chain so they cant fall back down there. Also. make sure your front chain guide is not bent at the bottom. It shuld have only a nice radius to it. If it is bent it will be down at the bottom and have a significant curve there.

That is the correct part number for the timing chain.

Randy - RPM

yep, been through all those possibilities and double checked guide locations. I rigged up a top support for the chain so that I could rotate the engine freely. I marked one side plate with tippex and counted the number of plates for a full revolution of the chain - 75 x 2 =150
Then I checked the old chain marked similarly with tipex - 78 x 2 = 156.
So I put everything away and went for a coffee..........

I have opted for the split link chain and and now that Wemoto has a branch in Australia they list a DID split timing chain for the FJ which should be here this week.

[Troyskie]

Mate, if it's any consolation, when you flash it up for the first time the satisfaction for overcoming all this irritation will be that much better.

At least you don't have to fight through paperwork and drip-fed bureaucratic road blocks.

Fingers crossed she's ready for Bermi end of month. Should be a nice distance to run-in a new motor