84-85 VF500 Experts - I'm stumped

OK, I have the right cams now (thanks Jamie), reinstalled, lined up timing marks, released chain tensioner, replaced camshaft covers(fingertight), went to rotate engine(counterclockwise), and the valves on the exhaust side seem hit the piston when it is compressed. I can get it to rotate if I back out the valve adjustment a lot. What's going on?
I'm thinking the sprockets must not be aligned right. Re-checked, maybe off by one tooth. The exhaust valve on number 2 & 4 are the ones sticking.
Experts - Any help is appreciated.
PS - Merry Christmas!
Scott

 

Have you had the valves out of this head it almost sounds like you have a valve stem bent it might not be hitting the head just binding when you rotate the engine over. When you back out the valve lash the rocker does not push the valve down as much hence being able to rotate the whole way!!! Just a thought??

 

Valves

A bent valve makes sense. Unfortunately, that repair might be to much, and I might have to part it out. Take the weekend to think about it.
Thanks

 

If you do it by the book, use the dots on the front bank's sprockets and use the dashes on the rear bank sprockets.

Or try this:

All 4 Cams, meaning front and rears go in on T1-3. Make sure the indication markings (stamped in the cams) on the cams face upward and the indicator line on the sprockets original markings are level with the valve cover mating surface. Rotate the crank manually by 2 turns and, if done right, there is no interference with the valves.

Actually this does make sense. If the crank timing is at T1-3, another 90 degrees counterclockwise (Interceptor) on the crank pistons in cyl 2-4 are at TDC. Camshaft markings are identical so the cams should be out 45 degrees at T2-4 from its original position facing 45 degrees forward. The cams revolve at half the speed of the crank. That's why they suggested to make new index lines putting cams in at T2-4. But why? If you install all cams at T1-3 on the crank all cam timings should come out right.

 

Don´t forget

Hello

I don´t forget to set the rocker arms for 0,0012mm between the rocker arms and valve.This has to correct or the valve can go to soon down.

Best regards

Gunnar

 

Gunnar,
I understand a lot of what you said. I also went back and re-read the section on installing camshafts. In step 10 (clymer manual), it says to rotate to the TR mark, then install cams. I thought that was for the rear cyclinders. I'm sure I set mine at the TF mark. I will go back and try setting them at the TR mark. That would be cyclinders 1 & 3 mark like you stated. Thanks, I will try this before I ebay the parts.
Scott

 

Hey Scott

The other reply was from Mason45,I did reply about the rocker arms and valve that it should be 0,012mm in vf700,750 and 1000 but I am not sure about the 500 think that it is the same.http://www.bluepoof.com/motorcycles/howto/vf_valveadjustment/.This site here can help you to understand the other thing.Best of luck and contact again and I will try to help you as best I can.

Best regards

Gunnar

 

Thanks Mason45!
Set engine at the TR mark, reinstalled cams, lined up sprockets, and it rotates now. I am going to check the rear cyclinder camshaft timing marks too. They seem a litle off, and the manual says to make sure they are right. Still need to adjust valves, etc
Thanks for the help - Jamie, Mason45, Gunnar!
Scott

 

The marks may be a little off (half tooth or less) until you torque everything down.

 

I'm glad I found this thread! I spent about 3 hours last night trying to get this right (I'm an automotive technician, so this is not foreign to me) and still isn't right. I was "reading into" the directions, and setting the timing marks to the front marker to do the front cams. Things all make sense now, and I should have the thing timed in a matter of a few minutes, when I get back to working on it!

Thanks!

 

Another thanks for this thread! I lined up the cams, both the the TR mark, and didn't even think anymore about it! Got the engine back in and rode it home today!

 

porter... did you align both front and rear cams using TR only mark. or front cylinder 2,4 using TF and and rear cylinder cams 1,3 using TR mark??
I thought you used TR for 1,3 and TF for 2,4 cylinders? so confusing... thanks honda.. someone tell me which is right and wrong here...

TDC cylinder #1. both cams should face up alignment 1E,2I-exhaust and 1I, 2E intake cams using TR marker.
cylinder #4 intake lobe faces down ?
cylinder #4 exhaust lobe faces up ?
1I,2E EXH
1E,2I INT

 

You resurrected a zombie thread there.

 

jeremy your not helping me....grrrr.. I'm getting grumpy and my bike wont start and im totally in need of a ride... zombies come alive to help a fellow vf rider

 

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Ignore other engines read my post on the Hondabbs forum under vf500 camshaft installation.
Ignore the clymer manual. Also Honda service manuals have mistakes. I had an update from John hilmour and all,fitted spot on. I can't post pics on this site so if you want the correct pages and some useful help from John and steevo form the Hondabbs website let me know and I will email them to you.
For reference the 83 and 84 manuals Feiffer to the 84-86 manual and a page update came out on a 1987 page which worked for me today !
Regards
Chris