in brief, the situation is this: I bought a new mechanical heart for my baby. at first glance it seems that it is completely new. but when viewed from the cylinder head and everything there is I found: on the cam lobes i found little "shell", which are like fish scales. they are not deep and not felt fingers. measurements showed that all dimensions are almost like new, wear, heat or shock I don,t saw. I only have one moment confusing these shells as is "scary" for longevity and health of the engine? if possible, as a "cure"?

wambr:

The photos are not focused on the lobes, and they don't help us to know what they look like.  The cam should be bright and shiny.....and not pitted.  It could be not having enough ZDDP in the oil could promote this condition.

Without better photos I would suggest you be sure to use a good oil with 1,400 ppm of ZDDP to keep it running as long as possible.

What do the rockers look like?

Dave, please explain in more detail-what does it mean ZDDP?

wambr wrote on 12/31/13 at 10:51:13:

It's an additive that's in all automotive oils but i think most motorcycles require higher levels.

thank you guys for your explanation! I will continue... after several unsuccessful attempts to photograph the defects Cams camshaft I realized that my camera is impossible to do it... so I'll try to describe in words". these defects are like traces of rust... such a small point. but I guess I can remove them with fine sandpaper, glued to the wooden block. what do you say about this guys? upon further inspection revealed another bit of interesting facts . when I  remove  cylinder head, i found, that the Japanese  who sold me this engine is apparently a great hurry, and collected all of the "curves hands" (he just sketched all the parts inside, as in the trash) and not very carefully. I don't know why, but the gap between the cylinder and the piston amounted to approximately 1.6-1,7мм. piston has a size of 87,8mm and cylinder 88mm. cylinder rather not bad. and this is also borne out by the piston rings. the gap in their joints within the norm. even were found leak in the exhaust valves. but this is not the problem-grind them to me not difficult. crankshaft while still in the collected crankcase and shows not a bad condition. based on the described-advise me guys-whether further disassemble the engine or you can calm down? all that is in the crankcase much wear or not? let me remind you that I have an idea to install this engine instead of "old". old had already covered already more than 40000 miles.

thanks Bluesman! I tried anything... just these defective places are at the top of camlobes . in a picture them getting the glare from the flash or from the lamp(when I describe the lamp). and they are quite small in size...

Yes, Dave, almost so.. engine savage 400 has another crankshaft with a lower stroke . the main gaps in these engines are the same.

cool! thank you for the link, Dave.