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Message started by klx650sm2002 on 10/27/10 at 03:54:35

Title: Desmo
Post by klx650sm2002 on 10/27/10 at 03:54:35

Can't read the writeing Does any body know how to adjust the clearances on one of these.
http://i51.tinypic.com/35cpdu8.jpg
Clive W :)

Title: Re: Desmo
Post by mpescatori on 10/27/10 at 04:26:29

The writing is in Hindustani (Hindi), you might try Google translator (but you might need an OCR to copy&paste the Hindi text)

As for the clearances, you need to replace the itsy "bowls" at the end of the finger pushrods (them thingies that look loke miniature dog bowls)

;)

Title: Re: Desmo
Post by rokrover on 10/27/10 at 04:31:56

Yeah, a real PITA. You have to fit shims under the opening and closing rockers and usually need to grind the next larger size down to suit. Closing clearance is zero so the valve is held snug (but not too tight) on the seat when cold. The opening shim is a cap on top of the valve stem and closing is a collar held by circlips. The upper rockers have to be removed to make changes; all very fiddly and time consuming. I used to have a diamond lap stone to hand finish the shims. There's no advantage of Desmo valve operation in the real world and this is more Ducati's sales signature. Back in the day when valve springs were weaker Ducati felt this was a good solution to prevent float.

Title: Re: Desmo
Post by klx650sm2002 on 10/27/10 at 12:04:09

Thanks guys it is much clearer now.
Clive W :)

Title: Re: Desmo
Post by Phelonius on 10/27/10 at 17:01:10

It is a complicated solution to a simple problem.

Phelonius

Title: Re: Desmo
Post by Oldfeller on 10/27/10 at 17:56:56

A desmo engine has no red line based on valve control issues. Float isn't possible at any rpm.

They rev, lordy do they rev