Shotgun1970 Posted September 11, 2015 Share Posted September 11, 2015 Hey all hope all is well.Recently got into forging iron and a friend of mine, who is a dirt bike racer, gave me a bucket of scrap steel to mess with. I searched the side for "engine internals" and couldn't find anything as to whether these things are malleable. They are 2 stroke camshafts, input shafts, and gears. Are they junk, or can they be forge welded into something else?Many thanks for your input.... Save me the propane if it's junk....jim Quote Link to comment Share on other sites More sharing options...
Shotgun1970 Posted September 11, 2015 Author Share Posted September 11, 2015 Update - the input shaft forge welded and folded over 4 times. Tons of sparks which I take as carbon content. Took a ton of heat to get to forge temps. Oh and I roasted a 190 lb Pig on Sat for 18 hours which came out xxxxxx, if that counts... Quote Link to comment Share on other sites More sharing options...
ThorsHammer82 Posted September 11, 2015 Share Posted September 11, 2015 All of those parts need to be very strong, so I'd say they would all work for forging. Quote Link to comment Share on other sites More sharing options...
Quarry Dog Posted September 11, 2015 Share Posted September 11, 2015 Thor's right. The shafts need to wear hard against either lifters or connecting rod bearings, and hold together at high RPMs with lots of force. Hard and tough. The gears could be cast though, which is about as unforgeable as it gets, or they could be drop forged and machined out, in which case go for it. Quote Link to comment Share on other sites More sharing options...
SmoothBore Posted September 11, 2015 Share Posted September 11, 2015 They are 2 stroke camshafts,Not to nit-pick, ... but 2 stroke engines don't have camshafts ..... Quote Link to comment Share on other sites More sharing options...
ThorsHammer82 Posted September 11, 2015 Share Posted September 11, 2015 probably meant crank shafts. Quote Link to comment Share on other sites More sharing options...
BIGGUNDOCTOR Posted September 12, 2015 Share Posted September 12, 2015 Engines use both forged, and cast parts. Cast crankshafts can be identified by the thin part lines. Also some motorcycle cranks are multiple pieces bolted together. Quote Link to comment Share on other sites More sharing options...
Quarry Dog Posted September 15, 2015 Share Posted September 15, 2015 Dang Smoothbore, I should have caught that one. Maybe his buddy had worked on a 4 sroke at some point though? Quote Link to comment Share on other sites More sharing options...
Shotgun1970 Posted September 16, 2015 Author Share Posted September 16, 2015 Not to nit-pick, ... but 2 stroke engines don't have camshafts .....good catch smoothbore, the cams came out of 4 strokes. Nothing gets by y'all! Quote Link to comment Share on other sites More sharing options...
SmoothBore Posted September 16, 2015 Share Posted September 16, 2015 (edited) good catch smoothbore, the cams came out of 4 strokes. Nothing gets by y'all!In my callow and ill-spent youth, I built and raced Moto-Cross Bikes, ... and the parts of a 2-stroke engine, are as familiar to me, as the back-of-my-hand. ( And YES, ... they did too have internal combustion engines, waaay back then ..... ) . Edited September 16, 2015 by SmoothBore Quote Link to comment Share on other sites More sharing options...
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