August 24, 201412 yr Has anyone got any advice regards cam followers on a B25, I'm pretty sure I've got one sticking that releases then drops making a metal on metal sound, or they're touching each other, the noise is only there when the engine gets hot.
August 24, 201412 yr The B25 motor had a tendency to bend the rocker arm shafts when over revved, causing the tappet (rocker arm) to stick. causing problems like you have I had this happen a few times when I did moto-cross!
August 25, 201412 yr Author Thanks, and this is where it starts to get complicated. I have a C15 to end on a B25 bottom end. Sounds like the engine is coming out again :-( Happy Bank Holiday Monday.
August 25, 201412 yr Author So, spent a while in the workshop today and I think I've found the issue. After much read in it appear that the cam followers need be fitted in a certain way, the oil holes need to face the back of the engine, which was news to me. A lot of people said the noise could be oil starvation related, so if the engine warmed up and thinned the oil, and the holes were facing the front the rotation of the cam would spin the oil away rather that into the lobes. Which would explain the noise. Do this sound possible?
August 25, 201412 yr So, spent a while in the workshop today and I think I've found the issue. After much read in it appear that the cam followers need be fitted in a certain way, the oil holes need to face the back of the engine, which was news to me. A lot of people said the noise could be oil starvation related, so if the engine warmed up and thinned the oil, and the holes were facing the front the rotation of the cam would spin the oil away rather that into the lobes. Which would explain the noise. Do this sound possible? Yes, I’ve done that before! If you have a look they are tapered, when they are facing the wrong way the heel hits the cam a lot harder Just make sure that it hasn’t cracked the stellite faces Edited August 25, 201412 yr by suzuki250
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