1975 r90 timing issue

Major Softie · Post by **Major Softie** » Fri Jul 19, 2013 4:14 pm

Foot wrote:My points were set when at a high point on the shaft lobe at 38mm.

Now THAT'S a gap!

I'm thinking a 2x4 would make a fine feeler gauge for that.

Jean · Post by **Jean** » Fri Jul 19, 2013 5:11 pm

I'm thinking the lad needs some help.
Foot, 38mm is over an INCH!
PLEASE, read Tim's instruction again and give it another try.

Foot · Post by **Foot** » Fri Jul 19, 2013 5:26 pm

How about 0.38mm?

Deleted User 62 · Post by **Deleted User 62** » Fri Jul 19, 2013 5:54 pm

Foot wrote:How about 0.38mm?

That's correct, ignore the naysayers...

Now your timing is too far advanced, but at least we are in the ballpark. Turn the points plate all the way clockwise and see where the light comes on. I'm betting the correct setting is somewhere in between.

Ken in Oklahoma · Post by **Ken in Oklahoma** » Fri Jul 19, 2013 6:18 pm

Tim Shepherd wrote:
Foot wrote:How about 0.38mm?
That's correct, ignore the naysayers... Now your timing is too far advanced, but at least we are in the ballpark. Turn the points plate all the way clockwise and see where the light comes on. I'm betting the correct setting is somewhere in between.

Ah, the voice of steadiness (and focus)!

Ken

Deleted User 62 · Post by **Deleted User 62** » Fri Jul 19, 2013 6:36 pm

Ken in Oklahoma wrote:
Tim Shepherd wrote:
Foot wrote:How about 0.38mm?
That's correct, ignore the naysayers... Now your timing is too far advanced, but at least we are in the ballpark. Turn the points plate all the way clockwise and see where the light comes on. I'm betting the correct setting is somewhere in between.

Ah, the voice of steadiness (and focus)!

Ken

Don't get all judgmental on me Ken !

Foot · Post by **Foot** » Fri Jul 19, 2013 7:50 pm

Tim, with s mark at the line and baseplate turned clockwise to the max the light is on. With s mark on the line the light stays on at any position.
I whent ahead and removed timing chain cover to check the timing marks they appear to be matched. I'm thinkin Ill replace timing chain and go from there. It must be the original chain ( no master link ). Can old chain be cut off ? Any tips would be appreciated. Thank you to all who contributed

Ken in Oklahoma · Post by **Ken in Oklahoma** » Fri Jul 19, 2013 9:15 pm

Foot wrote:Tim, with s mark at the line and baseplate turned clockwise to the max the light is on. With s mark on the line the light stays on at any position.
I whent ahead and removed timing chain cover to check the timing marks they appear to be matched. I'm thinkin Ill replace timing chain and go from there. It must be the original chain ( no master link ). Can old chain be cut off ? Any tips would be appreciated. Thank you to all who contributed

I'm thinking just a worn timing chain couldn't cause the discrepancies you've been seeing. Erratic timing, yes.

Ken

melville · Post by **melville** » Fri Jul 19, 2013 9:43 pm

Could these be the points with the excessively tall rubbing block?

OP says "recently acquired." Perhaps the PO installed some bogus points?

Otherwise, I'd wonder if the flywheel was on the correct index. Has TDC been verified?

Foot · Post by **Foot** » Sat Jul 20, 2013 12:03 pm

The points I have now look just like the points I took out.
TDC verified, yes.

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1975 r90 timing issue

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