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

[skidlids]

Originally Posted by dunlop0_1

If memory serves Simon I think the same belts fit the 620 and later 600 & 750.

Yep they are same width and same amount of teeth. The later belts as listed for the 620 cost about another £20 and from what I once read this is because they have a new formula in their make-up that reduces the the adhesion level between the belt and the pulley.

In some cases Ducati belts are on there third generation as they have been improved over time, but that doesn't mean you can't use earlier version apart from the Non Kevlar ones they did for the 916 etc with the white writing on them

And I would advise against using the square tooth belts on pulleys designed for belts with round teeth,

[SeeleyG50]

Er, Kev's getting old The ones I use are Flennor, not Dayco. £32 a pair from memory. They work fine, but seem to be slightly more heavily constructed than OEM (Gates) belts. I'm certain the Dayco ones will be fine too, after all, the belts are being changed so often on the racers, that wear & ageing issues are not a factor. Just don't run them too tight.

[Spjallen]

I've bought them now, I'm sure they'll be fine. Seems a fairly simple job, line up the dots, belts off, belts on and tension. I'm sure it can't be that easy I must be missing something. Any tips?

[dunlop0_1]

When all the dots are lined up only the horizontal belt is at TDC
Make sure you turn the vertical belt to TDC before you tension it.

Turn it all over by hand and re check the tension.

[Spjallen]

How do you know the vertical cylinder is at tdc? I think its with the fly wheel and window on the alternator cover, I've just had the flywheel off doing the gear change lever and did not line anything up when I put it back on. I'm thinking oh *h*t! Why do you have to turn it to tdc before tensioning?

[skidlids]

Originally Posted by Spjallen

How do you know the vertical cylinder is at tdc? Not the just lining up the dots on that one? Why do you have to turn it to tdc before tensioning?

Its good practice to do them both at TDC, take the plugs out to see when the vertical piston is approaching TDC also makes turning the engine a lot easier

Turn the engine with the back wheel with the bike in gear on a paddock stand,
TDC Timing marks can be seen on the flywheel through the window in the alternator cover

[Spjallen]

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