Replacing Valve guide oil seals - Page 2

**quarryman** · 18 Aug 08, 08:44 AM

Lesson definately learnt!
Phew...

**quarryman** · 27 Aug 08, 08:10 AM

At last! I have found a ducati mechanic who can fix the duke. He has agreed to drop the engine, deglaze the bores, new piston rings and oil seals, new base gaskets, check the timing and clearances, replace the valve oil seals (properly) lap the valves and put it all together again inside a week, for £300. good value methinks.

**Ghost** · 27 Aug 08, 09:01 AM

Whilst the barrels are off, lap the heads to the barrels also.

**quarryman** · 03 Sep 08, 09:33 PM

new bombshell is the price of piston rings........ Fooook!!
presumably no cheap routes into spares

**gillan900** · 03 Sep 08, 09:57 PM

Quote:

Originally Posted by quarryman

new bombshell is the price of piston rings........ Fooook!!
presumably no cheap routes into spares

Another option is why not put H/C pistons in

they are not much more than a set of rings if you get them from the states. check these out...

eBay Motors: JE PISTONS DUCATI 1991-2002 900SS PART # 157597 (item 120301251658 end time Oct-02-08 15:38:45 PDT)

**Mr.R** · 04 Sep 08, 07:16 PM

Quote:

Originally Posted by quarryman

new bombshell is the price of piston rings........ Fooook!!
presumably no cheap routes into spares

Most aftermarket pistons use Japanese pistons rings, try cross referancing similar sized Jap bike rings, they'll more than likely come up a lot cheaper than Ducati parts!
I've used Yamaha rings in Ducati's in the past, also Yam' smallend/gudgeon pins in custom Cosworth/Arrias/Wiseco Ducati pistons.
I fairly sure that Pistal's use Jap rings as well.

Steve R

**MC TOOL** · 08 Sep 08, 11:51 PM

lapping the heads to the barrels , I been wondering about this for a while ( the paso is showing signs of leakage here )What's the tecnique here ?

**Ghost** · 09 Sep 08, 06:05 AM

Quote:

Originally Posted by MC TOOL

lapping the heads to the barrels , I been wondering about this for a while ( the paso is showing signs of leakage here )What's the tecnique here ?

Don't know about Paso's but 750ss and 600ss do not use head gaskets.

Remove head and barrel as that is off you will be wanting ( or should be ) to lap in the valves also so strip them out.

Then put some fine lapping paste on the mating surface of the barrel, small squirt of WD40 as well, drop the head into place and with an even downward pressure rotate the head back and forth just like you would a valve.

**MC TOOL** · 09 Sep 08, 09:24 PM

cool , I will give this a serve next time I have the lids off , and , no the paso doesnt have a head gasket either . I wonder if they could be O ringed ? thanks for that info

**Imola Duke** · 09 Sep 08, 10:49 PM

Quote:

Originally Posted by Mr.R

Most aftermarket pistons use Japanese pistons rings, try cross referancing similar sized Jap bike rings, they'll more than likely come up a lot cheaper than Ducati parts!
I've used Yamaha rings in Ducati's in the past, also Yam' smallend/gudgeon pins in custom Cosworth/Arrias/Wiseco Ducati pistons.
I fairly sure that Pistal's use Jap rings as well.

Steve R

Thats interesting!
I need new 583cc rings for my SS engine in my dd bike which i'm going to strip the top end over the winter etc