does any one know the specs on se 255 cams....I don't need the normal specs....I need to know what is the diameter on the lobe (lobe to the opposite side of the cam) and at what size do they need to be replaced....

 

nobody knows????I would think it would be available info. from harley ...they are stock in the cvo bikes and when you rebuild one of the motors that would be something you would measure......

 

Then why ask here if its readily avail? And measure what? I dont follow? I must be soft this morn.........

 

are you asking if the brg surfaces of the camshaft get worn down? they will show bad wear scratches if there is a problem, they don't wear there they are very hard and unless oil starvation was an issue you're ok

 

You aren't making any sense.

 

Ok, let me try again, if you tear down a motor etc. there are specs. to determine if the parts are bad,ie. main bearings are allowed .015" play if it is more you replace the bearing (just for example)...I am trying to find out what the replace measurement is on the cam lobe of a se-255 cam, I found the specs for the bearings but not the cam itself...and I would think it would be readily available information, but I have not been able to find it...

 

The cam lobes should show no signs of wear, at all. No pitting, no scratches, etc. If they do, they need to be replaced, no exceptions. The cam lobes surface is hardened and once this hardened surface is breeched the cam lobe will wear very quickly. Once this occurs, you'll get a lot of shaved and/or powdered metal throughout you engine and it will need to be torn down and cleaned out thoroughly. Play it safe, don't try to save a few bucks if there is any doubt whatsoever. Replace the cams when you have it apart, you'll be $$$ ahead in the long run.

 

I still find it strange that the hd repair manual doesn't give any specs on the cams...

 

Are you talking about cam lobe wear that would impact the lift? If that's what you're looking for, and there is no excessive wear visually apparent, just measure the base circle dia., measure the lobe at max lift, and multiply the difference by x.x (rocker arm ratio - 1.6/1 I believe, but better check for sure).

That result should be equal to the advertised lift. Any difference would indicate the amount of wear.

If the cams are still in the engine, just measure the valve lift with a dial indicator and compare that measurement to the advertised lift.

 

Are you talking about the lift, duration, overlap etc...? If so, I don't know either. I looked in my softail manual to see if the stock cam specs are there and much to my surprise nothing listed for cam specs. I'd also think the information would be readily available.