906 repairs / adjustments

enzo906 · Post by **enzo906** » Tue Jun 12, 2007 3:23 am

Hi Guys,
It's been 8 weeks and I have pulled the bike down 3 times now. Each time I ride it something new needs doing. I am now leaking fluid from the small hole on the water pump.
Is that a repair that can be done easily with your normal range of tools (No special tools or pullers etc)?
Any help or advice is greatly appreciated

Also I have followed all the topic's on Dell Orto's but still have that cough back through the carby when the bike is cold and occaisionally when it is hot. I have tried richer pilots but it does not seem to change anything. The valve clearances are OK
No signs of leaks or loose manifolds, the carbies are in good condition.
K4 needles
58 Pilots with K&N filters
6.5 slides (Modified 6.0 slides - which helped a little)

I have tried 60 pilots and 1/2 turn less on the accelerator pump which did nothing and have gone back to the previous settings. The bike was originally setup by a Ducati Shop, the carb conversion Flowed heads and Dyno Tuned all before I bought it.

Any Ideas?
All help is greatly appreciated
Cheers

persempre907 · Post by **persempre907** » Sun Jun 17, 2007 6:23 am

Hi Enzo,
the water leak from the pump is a frequent issue.
It's quite easy fix it: you need only replace the ring on the shaft.
The water pump is the same of the later Ducati, so you wouldn't have any problem to find it.

Unfortunately, I haven't any experience with the Dellorto carbs. I cant' help you.

Ciao

marshman · Post by **marshman** » Sat Jun 23, 2007 7:59 am

Howzit
Welcome to 906 land,once your on top of it dude" she'll be right !bro".The faults are plentiful but are all easily overcome.Most parts [crank ]are shared with 907,851,916,ST2 etc [eg all water cooled models] Couple questions : How you testing for manifold air leaks ??have you set vacuum for ignition unit[assuming you got OEM Magnetti-marreli digiplex unit]
Ducs are very easy to work on if you have a good mechanical mind .Common size hex heads all over .but beware the Italians like 15mm as a bolthead size.
Cheers Andrew

jomo · Post by **jomo** » Wed Aug 01, 2007 11:33 pm

Enzo,

Andrew is right, you should make sure you have no vacuum leaks. My Dells used to have a minifold vac hose going to the Mgnetti-Marelli, but when I changed to the Silent Hektik ignition, it has no vac advance. So I just plugged the manifold.

The dellortos do have a habit of coughing when cold. I will have to look at my jet sizes. I thought I wrote them down, but I can't find them.