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Engine cracks?

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Noticed this yesterday when I cleaned the bike up to get ready for spring. I've not even had the bike a year yet, and I only ride trial and do hill climbs so nothing major. Are these cracks or something else? The 3rd pic is what's really got me worried.

engine1.jpg

engine2.jpg

engine3.jpg

engine4.jpg

enigne5.jpg

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They look like casting marks. I work on automatic transmissions and see those all the time on the cases and valve bodies. Some do look like actual cracks but it's only on the surface.

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Any oil around them? Those look like casting marks..... clean those areas up real good (Scrub brush and some detergent/water)..... Take the bike out for a short ride... get the motor hot.... then look for oil.

I had a mark on an 88 Honda Hawk I swore was a crack on the outside of the cylinder.... after I looked at other Hawks, they ALL had them... it was a casting mark. I was a wreck till I figured it out...lol.

Hope this helps and good luck,

Dennis

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Thanks. Aparently they've been here for awile, and no I've never seen oil come from anywhere, so I think you guys are right and it's just casting marks. I've probably seen them before but never really payed any attention to them. Thanks again.

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Yes, just casting marks. I have the same thing on my 05' CRF150. They were there since the day I bought it brand new! No worries..

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