Mr.R
Hi,
I'm new to this forum, i've had my wife take some pictures of me and the bike today, before I went out for a ride.
I've owned her for 9 years,(not my wife, the bike) I rebuilt her myself 2 years ago with a 916 balanced crank,851 "H" section rods, 916 barrels, sqiush set at 0.9mm, 996sps cams, alloy vernier adjustable timing wheels, alloy 1/2 time shaft wheels, alloy flywheel, alloy slipper clutch with Ti' faced basket, 54mm single injectors throttle bodies, ITG airfilter with the top removed from the airbox, magnesium outer covers, 916 oilcooler, 50mm spaghetti system and a fair few trick/lighter parts on the rolling chassis, inc' a full carbon body kit apart from the OEM steel fuel tank.
I started my mild tune with 82rwbhp and achieved 116rwbhp a 34 bhp gain at under 10,000rpm with a big fat flat torque curve, which I was quite pleased with for a 1st effort with a 4 valve Duke.
I now have a mk2 motor on the bench, a 984cc longstroke, 955 corsa pistons, with SP5/916SP heads with 35/30 valves 1mm oversize inlet valves, 54mm twin injector throttle bodies, 3 piece carbon corsa airbox, 'X' type carbon air runners and a 748 close ratio gearbox.
I'm hoping to hit 128rwbhp again at under 10,000rpm.
I've owned Ducatis for almost 30 years and own 4 at the moment, two of which are 851/888's.
Anyway a big HI to everybody on the list, I hope to be able to share some good info' with you all.
Steve R
marvin
Welcome Steve!
Nice looking bike. Must be fun to ride. Where are you located? from the pics I'm guessing Europe somewhere!!
Mr.R
Sorry about that Marvin,i've filled in a bit more of the profile now.
You're right pics were taken in the lane beside our 300+ year old house in Callington S.E. Cornwall, S.W. England.
Callington was a Saxon settlement, so it predates 1,000AD.It's mentioned in the Doomsday book, the Norman catalouge of their spoils of war, after the invasion of 1066.
I used to live in the oldest cottage in the town which was built around 1460.
I'm a bit of a history buff.
The sound of my various Dukes or Ducs to you Americans,(I have 4... "74 250 Desmo,"79 900ss, "91 851/888 and my "92 851/916 special) bouncing of the stone walls in our little villages with their very narrow lanes is awesome.
I'm known as 'Ducati Steve' locally,or 'here's noisey' in my local pub, friends have said they can hear me coming from almost 3 miles away.
Cheers
Steve
P.S. The attached image in my 1st post was ment to be my avatar,i'll get my wife to sort that out.
Jimmy
Welcome Steve, nice collection. To fix you avatar go to UserCp and then to edit avatar. Jimmy
tiz851
welcome steve!
ciao tiz
ps:jimmy....your avatar..is simply the best!!😁 😁 😁 😁 he used a old conti???
marvin
Interesting neighborhood Steve!! :-)
Very nice collection of bikes. I also went the 748 head route with 95mm bore, made for a strong engine. Sold it and am presently fitting a S4Rs engine in.
Marvin
replicante
Nice collection Steve!
Any photo of that bevels? 😄
Salud.
jeff27
Beautiful bike, when is the 984 going to be done?
Corse
I have spent a few summers in Cornwall. It is one of the most beautiful places in England.. the towns and villages are stunning! I can imagine riding a Duke around those country roads, its must be awesome!
Mr.R
jeff27 wroteBeautiful bike, when is the 984 going to be done?
Hi,
I've got almost 99% of the parts now, the only thing holding me back is lack of cash and a few too many other Ducati projects.
I've got 4 Ducati's!
I need a pair of Carrillo rods, the new ST4 cases bored to accept the 955SP barrels and maybe a new crossover/jackshaft as I've read that the ST'S used a different length to the 851/888/916's????
If this's right I'll be a bit pissed off as I've got a few spares for the earlier motors.
I've got the use of a spark erroder and I'm lightening all of the internal gear wheels at this moment and the selector drum, I'll attack the 900 crank with a view to copying the Corsa cranks of the day apart from the stroke, then get the whole shebang balanced.
Then I'll be searching for a base level eprom/chip on here and then going down the PC111 route.
Has anyone out there got a chip for this size of motor using 996 SPS cams?
Steve R
marvin
Steve R,
The St is different. Mainly because one of the bearings is smaller. I can't remember if it's a different length but do remember machining a spacer washer for my Monster using later cases, may have been because of bearing width. I will look for an early shaft and compare. I have one here if you can't find one locally. Shipping would probably be as much as buying a used one there. Let me know if you want me to look into it. You can have it if you want to pay the shipping.
Marvin
marvin
Steve, P.S.
I don't know what year St cases you have or how far into the project you are but here are a few things that I noticed.
The oiling system has changed over the years. along about 99 or 00 the oil pressure relief valve was moved from between the cases to "in the pump", and the pump ports are larger. These cases still had the pressure relief valve between the cases but had a longer plunger against the spring so the valve in the pump would blow first.
The next generation (that I know about) has even larger ports in the pump and the cases with the relief valve also in the pump but there is none between the cases. This model has a special through drilled bolt in that position(head painted red), cases sealed with an o ring between the case halves. some where along this time the gear on the oil pump was changed to match the drive gear on the crank. (gear can be switched to either pump).
The S4 cases (don't know when it changed) have the locating dowel pins for the cylinders in a different position.
I found the new style ST shaft, still looking in boxes for the old one.
Hope this helps!
Mr.R
Corse wroteI have spent a few summers in Cornwall. It is one of the most beautiful places in England.. the towns and villages are stunning! I can imagine riding a Duke around those country roads, its must be awesome!
Hi,
I'm originally from East London but I married a Cornish Woman, I often pinch myself (as I feel so lucky) on my way to work every day as the views from the top of Vivadon down are outstanding and in the darker months I can see the Eddistone Lighthouse's light flashing 14 miles out into the English Channel a good 25 miles from the Down.
As a child my parents would bring me here on camping holidays,( 45 years ago now) I thought of it as a place of mythical dreams and wished that I would one day live here, the ancient castles, the even older standing stones and of course the 'Piskes' or the little people as the Irish would call them, not forgetting the Cornish Knockers or 'They hungry little buggers' as my wife calls them!
To this day we never eat the Pasty Knobs (Crusts) as they have to be put aside for the Knockers.
I've said it before and I'll say it again, I've been lucky all of my life!
Oh yes and the roads are wonderful! Add to that the fact that the Police stations shut at 5 o'clock and it's GREAT for riding a bike around in the evenings...
Steve R
marvin
steve R,
I can't locate the early shaft, too many things got misplaced when I moved my shop. I'm sure it's in one of these boxes somewhere!
I did find three of the late shafts. If my memory serves me well the shaft isn't longer just different to accommodate the smaller bearing. which is not only smaller diameter (left side engine case, that's how they made the cases stronger) but not quite as wide. I believe I just turned a spacer washer to make up the difference. when you get a shaft it will be obvious as to "what to do".
If you want one of these shafts PM me your mailing addy and I will check with the Post Office on price to mail.
Marvin
jeff27
Mr.R wroteHi,
I'm originally from East London but I married a Cornish Woman, I often pinch myself (as I feel so lucky) on my way to work every day as the views from the top of Vivadon down are outstanding and in the darker months I can see the Eddistone Lighthouse's light flashing 14 miles out into the English Channel a good 25 miles from the Down.
As a child my parents would bring me here on camping holidays,( 45 years ago now) I thought of it as a place of mythical dreams and wished that I would one day live here, the ancient castles, the even older standing stones and of course the 'Piskes' or the little people as the Irish would call them, not forgetting the Cornish Knockers or 'They hungry little buggers' as my wife calls them!
To this day we never eat the Pasty Knobs (Crusts) as they have to be put aside for the Knockers.
I've said it before and I'll say it again, I've been lucky all of my life!
Oh yes and the roads are wonderful! Add to that the fact that the Police stations shut at 5 o'clock and it's GREAT for riding a bike around in the evenings...
Steve R
Oh man, that sounds great. Must get over for a vacation some day...
marvin
Steve R,
Ok, I finally remembered. Problem was I had not had any beer earlier!
I used the 99' SS Cases for my 94' 2V. The Jack shaft was a little short because of the narrower ball bearing in the left case, and too large a diameter. I turned it down to fit the ID of the ball bearing and made a spacer washer to compensate for the the narrower bearing. The thickness of the washer isn't all that critical because the shaft is located via the ball bearing, pinched between the flange on the shaft and the drive pulley on the outside of the case.
Marvin
Mr.R
Thanks for the effort Marvin,
I knew about the differing oilpump, another pisser as I've got several early pumps!
But more oil is better than less in my book/opinion especially as the motor will be kicking out a fair bit more power than a standard ST4 or 851!
Your info' on modifying the jackshaft will be very helpful, I'm sure I'll be able to sort the shaft fitting out now.
I don't know which year c/cases I've got the info was on the Ducati box they came in which has looong since been recycled by Mrs R.
Apart from the swinging arm mounting they look very similar to the 748R cases pictured in Falloon's Desmoquatro Performace Handbook.
I have the cases here in front of me and they have Grimeca D143 and the part number cast into them is 226.3.008.8C and have 510 03E etched inside the lefthand case, they also have G3F cast into the circle/clock face casting mark with a large B outside of the circle.
Can anyone shed any light/info on these numbers please?
Brad?
Steve R
marvin
Hi Steve,
If you have the cases that have the pressure relief valve in them I think you can get by using the old oil pump if you port it and smooth out the flow. If you have the really late cases without that provision I wouldn't try it. You can identify those cases by them not having the provision for the relief valve and there will be a countersunk o-ring fitment near there in one of the case halves (one of the case bolts goes through the countersink). Some time ago Brad posted about this thinking that there would be a good chance of cavitation with these huge ports/passages and the old pump. the new pumps look like someone already flowed them. Brad also mentioned that he has seen these new engines pumping over a hundred pounds pressure at low rpm's. Brad is the man with the answers here!
Best,
marvin
marvin
Steve, For Reference:
bad pic, on the right side the caliper is just on the right edge of the c-ring. Left ball bearing side measures 16.99mm (measured with caliper, not mic), right , needle bearing side, 19.28mm.
Here's a link that may be of interest if you have the late cases that aren't bored/tapped for the pressure relief in the cases.
http://www.speedzilla.com/forums/general-ducati-chat/29862-thru-drilled-engine-case-bolt.html
Marvin
Mr.R
Thanks for that Marvin it's been a great help!
The cases I have must be the later type, the hole for the pressure relief isn't bored through and hasn't got a thread.
The small bolt hole next to it has the drillings for the feed to the underside of the rear piston, so I'll need the 'Red' painted bolt along with a few other parts.
The ST4 oilpump and the plug that covers the oilstrainer as these cases use the later type strainer, I had a bit of luck with that as I'd bought a 749RS item thinking it would fit my 851, which it didn't 🙁 but it does fit these cases! 😁 .
I bought a later crossover shaft off E-Bay for not much money, then thought I'd compare it to the one from the 916 motor I cannibalised to build my 851/916.
They're exactly the same.... BUGGER!
Still you live and learn, which's all part of the fun/learning curve.
Do you know if the small drilling to spray the underside of the rear piston needs a smaller jet fitted to it?
I've seen this set up in KTM motors at my mates workshop, I believe it's more to cool the underside of the piston rather than lube the cylinder wall/piston skirt, the early GSXR motors used this set up aswell, also I think Dr 'T' used it in his early prototype air/oilcooled V Four motor.
Steve R
