Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > Timing Belts

[dunlop0_1]

Originally Posted by Spjallen

Think I've worked it out. The flywheel has a punch mark which I should have aligned with the crank. Pants!!

You could leave if you want. Line the pully dots up and fit the belts. Tension the horizontal belt. Stick a straw in the spark plug hole of the vertical belt. Turn the engine by hand/wheel until tdc is reached, your best guess will do. The dot on the pully will be roughly around 5 oclock. Tension the belt.

Basically it's to avoid getting a false tension on the belt because the helper springs can apply some pressure on the belt if it's not a tdc.

[Ghost]

Don't forget that there are two TDC's per cycle firing and exhaust. Really will pee you off if you time time it on the exhaust stroke.

[Spjallen]

Thanks Pieman. Ghost, you're not helping!!

[dunlop0_1]

You have compression stroke up to tdc (Combustion / both valves fully closed) this is the one you want.

Then the exhaust stroke which at tdc would have the exhaust valve open/closing ish.

Something like that anyway

[Ghost]

I don't get a false tension, cos I throw those silly hindrance springs away. I have a bucket full of them if anyone needs any.

[dunlop0_1]

Originally Posted by Ghost

I don't get a false tension, cos I throw those silly hindrance springs away. I have a bucket full of them if anyone needs any.

and how many pistons have you gone through.

[Ghost]

Originally Posted by dunlop0_1

and how many pistons have you gone through.

Only melted one through naff oil, Sunlite Vegetable oil is no use at all. Even tho' it looked like I was Cooking a BBQ.