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Old 05-08-2013, 07:29 AM   #7531
mcma111
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Quote:
Originally Posted by Reposado1800 View Post
I was looking at the marks seen through the inspection hole at TDC. I went with dead on at F1 because a tooth either way would have been way out.
I got it running. I think I need to replace the pulse generator as it is doing something weird that was happening even before the teardown.
Other than that it runs great.

You are supposed to be at T l, not F l. The F mark is for FIRE which is advanced of T for TDC. In other words you may have mis-timed the cam. With the crank at T l this is what the cam timing marks should look like:

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Old 05-08-2013, 07:38 AM   #7532
Reposado1800
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I got it as close as it was going go. The two slash marks are still visible from the flat of the head. One is just a hair higher than the other at T1. At F1 they are flat. The difference in T1 from F1 is a gnats pube hair.
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Old 05-08-2013, 07:42 AM   #7533
mcma111
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By having the cam gear not being in alignment shows that the chain has stretched. At -l l anway.
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BMW's
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87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
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Old 05-08-2013, 07:48 AM   #7534
Reposado1800
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It has 14,000 on it. I bought a CDI from regulatorrectifier.com and a pulse generator from service honda.
It has a variable idle which it was doing before teardown. Carbs look great so hopefully it is the ignition pooping in the punchbowl.

The Engine Dynamics head is saaaaweet.
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Old 05-08-2013, 07:50 AM   #7535
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Try going up a size on the pilot jet. Can't hurt.
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BMW's
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87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
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Old 05-08-2013, 07:54 AM   #7536
Reposado1800
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I might try that. I think the ignition advance is jumping around and cutting out all together intermittantly. About time to replace 27 year old parts that have been roasted in hell from time to time.
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Old 05-08-2013, 08:18 AM   #7537
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A timing light trained on the timing marks while running will show if it jumping around on timing.
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Old 05-08-2013, 12:23 PM   #7538
Reposado1800
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Engine Dynamics Bling Bling

Here is my engine head all fixed up.


Note oversize exhaust valves.
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Old 05-08-2013, 01:35 PM   #7539
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How about these valves?


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BMW's
58 R26
79 R100s
91 R100gs

87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
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Old 05-08-2013, 01:42 PM   #7540
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What is the secret handshake for that bling?
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Old 05-08-2013, 01:45 PM   #7541
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CASH BABY....Lots of CASH
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BMW's
58 R26
79 R100s
91 R100gs

87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
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Old 05-08-2013, 02:59 PM   #7542
Carter Pewterschmidt
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Head work rules

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Old 05-08-2013, 03:04 PM   #7543
mcma111
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Oh Yeah??

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BMW's
58 R26
79 R100s
91 R100gs

87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
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Old 05-08-2013, 03:06 PM   #7544
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OK, last one


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BMW's
58 R26
79 R100s
91 R100gs

87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
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Old 05-08-2013, 03:24 PM   #7545
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If the gear on the crank is out of position/time even if you find another gear tooth that is CLOSE to where it should be the balancer WILL be OUT OF TIME with the crank.[/QUOTE]

Thats what worries me Steve, I'll have a look at the crank this morning, and compare tooth positions with the photo Davek posted, and thanks Davek that photo is going to be a great help. I had no idea where the original mark was in relation to the crank.
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