On my 998R engine, the crank cases are sand cast and unpainted. Outer covers are painted however. I believe tis is the norm.
I thought a 999S engine infact most "S" engines were the same spec as the previous years "R" engines? 996R (100mm) became same as base 998 (100mm), and 998R (104mm) engine was the same as 999 base engine ?? always thought a 996R was the same engine as a 998s??? not sure comment? Apparently as stated here USA bikes had the short diecast cases on the998S and the 996R was never complied for the road and intended only for the track, sold with standard wiring harnesses but minus the road lights etc
My crankcases are sandcast and it's only a 998s. Going through the forums, some were, some were painted. Parts bin jobby.
your right 998s is 104 mm X 58.8, is the s engine the same as the 996R then? cams, valves?? thanks for the reply
might be a difference? the S was advertised with 136hp and the R with 139hp probably to justify the extra cost (996R short run) was $54,000AUD the 998S was $36,000AUD and the only difference i could see was the Bostrom, Bayliss and Zaus another paint jobs, and two piece fairing sides on the S, the 998R was originally advertised for $68,000 AUD????? not many in Australia? in 2003 the remaining 996R sold for $40,000SAUD I brought when they got "cheap"
My 2002 998s cases are unpainted too if I remember correctly. The bike also has a different exhaust to the stock 998 I think? and 996R ECU as standard? I don't think from what I have read there is a huge difference between a 2002 998s (EU) and a 996R, but I've not owned / had all those motors in bits and weighed parts etc.. my motor has been to Biggelaar and I don't really know how far they went with it, I think it just had top end work. Taken from Wiki: The 998R and non US 998S models had different crankcases with a deep oil sump. The standard 998 had crankcases which were very similar to the previous Desmoquattro. The non US 998S as well as the 998R had revised cam profiles which provided more power than the standard 998. The 998R model used a 104.0 mm × 58.8 mm (4.09 in × 2.31 in) mm bore and stroke which actually displaced 999 cc, and was very similar to the engine used in the subsequent 999R model. In 2001, Ducati introduced the 996R. with the 998 cc Testastretta engine. This bike was the true introduction of the Testastretta engine and the 998 model. The engine was similar to the 2002 non US 998S. > another: The 996R pistons are 30 grams lighter than the 996SPS ones they replace; they travel through a shorter stroke and are now capped by a cylinder head with valves spaced to fit over the new 100mm bore. No one has really done much work on these street engines as all the effort is going into the more extreme RS variant. Sigma however specialises in getting the best from the street stuff, so a 996R or the later more mass produced 998s, the 2002 998S engine has the same deep sump sand cast crankcases (made in super tough Galsi 7 alloy) as the homologation engine. > I am aware anyone can use Google & that the above may not be factually correct, likewise I am sure there are plenty bikes out there that are also not as were OEM. It would seem the 998R engine is a bigger bore than the 998s, the 998s compares with the 996R.
I would like to also say, if you look up the difference between sand casting and die casting.. it would seem a bit strange the 998(S) would be sand cast? It makes sense the 996R would be. The fact the cases are not painted does not mean they are sand cast. http://info.cpm-industries.com/blog/bid/328544/Difference-Between-Sand-Casting-and-Die-Casting I don't know. I have found posts from people who have had the 998s 2002 motor rebuilt who claim the rods were Ti and valves the sames as the 996R.
The Bayliss , Bostrum, Zaus, 998s I saw definitely had the sandcast cases and were @ $38000 AUD, $16,000 cheaper than a than a 996R @ $54000AUD? and $30,000AUD cheaper than a 998R @ $68000AUD this puts into perspective the value in the latest Pangalie prices. homogolation specials? only in dimension all parts are nothing like parts fitted to RS and F bikes Yes I always thought the 996R and the 998R engines where identical rated hp was in Ducati literature 136hp for 998s and 139hp for 996R all this pi...ed me off as i paid much higher money for the same bikes the bike 998R and S and the 996R have cases sand-cast; the same looking as the RS and F motors of the same year The deep sump cases that were painted were unmistakably diecast, I have personally never seen a painted sandcast case? if I am wrong tell me? I believe the diecast cases where produced to offer the deep-sump advantages for the lower performance, cheaper engines without the cost or the sandcasting which is high, because of the skilled labor required to set the core-box. please correct me if you know better. I never checked the engine parts list but was told by the shop that the 996R and 998S engines where the same, were the cams the same?
yes I am sure all the Bayliss, Bostrum, Zaus bikes had sandcast cases, but i have been looking at the 998S for sale adds looks like some of the red ones had diecast cases?
The only thing certain is different countries have different "Design Rules" Australia has the ADR which made my UK 998R unregisterable in Australia without an compliance report and changes to comply with Australian Compliance standards I am fairly certain the late 998S Replicas had most of the attributes of a 996R In Australia In the USA they were short sump Diecast engines (determined by searching other statements on the net but who knows? Ducati may have used a stock of Sand cast cases up on Australian 998S?
Something like that... the Americans got the lower power, short sump but got some extra carbon fibre instead. Not sure if there's much difference between the engines of the race reps and std S's though... Ian
I have seen the replicas with Olhins front forks, I think the Bayliss Zaus ,and Bostrum bike as delivered to to Australia, used 996R parts except from fairings
