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03-06-2017, 12:48 PM

#16

J-P

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Join Date: Oct 2004

Location: Saint Nom , FRANCE

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First, following the manual could be a good start and help in the trouble shooting.
Because it's an old engine, with a lot of history problems I would personally send it back to the factory.
This has been proven most of the time to be faster and cheaper than trying to solve the problem himself, purchasing and changing unnecessarily, sometimes, good parts.

CAM GEAR TIMING

http://www.yspower.co.jp/en/data/pdf/dz170.pdf

If for some reason you have to disassemble your engine, please followthese important steps on reassembling the cam gear.
1- Remove the carburetor and backplate assembly. Notice the impression mark or dot opposite the rod journal on the crankshaft.This mark is to point straight down or lined up with the outercase seam line at the bottom.
2 - Reinstall the cam with the dot facing you and pointing slightly to the left. This will allow the cam to turn to the right when properly installed. The dot should be pointing straight up when cam is fully installed. Reinstall cam cover and timing is now set.

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