hi all ive read that the timing should be 2mm btdc but does anybody know what that is in degrees and also im i correct in thinking the engine goes anticlock wise looking from the alternator side cheers scooter
I dunno about an LC but all the other vehicles I've owned/worked on, rotating the engine via a nut/bolt on the end of the crankshaft is always clockwise.
Its the opposite way to doing up the nut, otherwise the nut would undo with vibrating and rotation forces.
I take it that the thread on that shaft is a left handed one then?
When the engine is firing/running, is the crankshaft turning clockwise? I know this is the case on many a four stroke engine, whenever I've done cam belts or valve adjustments for example, manuals have said turn over clockwise.
Post by tony2stroke on Dec 22, 2019 21:34:23 GMT 1
Let me see if I can explain, there are 3 shafts in the engine, 1 on the crank and that goes anti clockwise, then the clutch shaft that spins opposite direction (clockwise), then output shaft that spins anti clockwise again, the same direction the wheel spins, if the crankshaft span clockwise the bike would run in reverse.
So as OEB said turns left, which is anti clockwise.
This is sitting on the bike looking at left side of bike.
I hope I haven't confused the issue here.
Wales where the men are men and the sheep are beautiful
Post by shaunthe2nd on Dec 22, 2019 22:26:46 GMT 1
Easy to check, just push gently down on the kicker and you will be able to see the rotation.
RD 350 LC - 1982 - bounty like my bike in the 80's, finally got an original UK one. 31K/Aprilia RS hybrid - ex Yogi and Muttsnuts bike - my first hybrid Triumph Street Triple R (sorry!) ...and a box of bits I hope to be able to turn into a 1983 31K
This is the shaft that we are talking about, usually there's a big nut on the end of that thread which manuals say to turn clockwise to align timing/cam lobes, so those engines certainly fire/run in a clockwise direction. I know that some engines are designed to run in an anti clockwise direction, didn't know that an LC were one of them, is this common with 2 stroke engines then??
Yes Mate, As I said crank goes round anti clockwise, which transfers the motion the opposite way on the clutch shaft to clockwise, which in turn transfers the motion back to clockwise on the output shaft, which has the front sprocket, which in turn then turns the rear wheel sprocket in the same anti clockwise direction through the chain.
I think on a 4T the reason for clockwise rotation is to line up timing marks only, there is a lot of force needed to turn a 4T engine compared to a 2T engine, and if you turned the nut clockwise in this situation the cam or crank nut can come undone instead of turning the engine.