748r To 855r ?

[JDR]

only do track days on my 2002 748R thinking about big bore kit carried out by Cornerspeed, anyone who had this work done and is it worth it, and advantages/disadvantages and any other additional works recommended or required, thanks

[Chris Wood]

WHY???

Positive question....What are you looking to change?

[doogalman]

Never mind the big bore, what about getting the drinks in new boy.

I'll have a nice glass of chilled scrumpy please.

[jeff st4s]

Never mind the big bore, what about getting the drinks in new boy.

I'll have a nice glass of chilled scrumpy please.

You professional drunk, Cider ughhhhh. thought you'd be more of a Blue Nun or Black Tower man now :lol: :lol:
Welcome JDR, mines a pint of G&T, I'm having a bad day and I need a drink!

[doogalman]

Jeff, you in the wrong time zone again???? Old mothers ruin?

[JDR]

More grunt having rode a 748 with mildly tuned 916 lump @116bhp there was noticable better accelaration out of corners but still love my 748R general handling and dont wont to change bike to 996/998

[JDR]

New boy more like old boy me thinks

[phil_h]

Welcome to the board JDR, I'll have a nice cold virtual Guinness, thank you for asking.
You dont happen to race a ducati single do you ?
I know a JDR in CRMC

[JDR]

Hi Phil , no not me just track days for last couple of years,bit old for racing.
Any info on big bore kit would be helpful

[phil_h]

I've got a 748SPS and my friend has a 748R, both with 45mm cans.
The R has more mid-range than the SPS already, so its prob the gruntiest 748 package.
If you dick with your engine size, you'll find it much harder to sell when you eventually want to.
Ditto for fitting another engine, unless you keep the old one to put back.
If you tot up the cost of an 853 kit, and a 'full-monty' type fitting job, cos whats the point if you have it all apart anyway, I think you could justify trading up to a 9xx.
I've been deliberating this all year :)

[keefer]

hello JDR.
Sigma or Corner speed seem to be the place to get this work done.
Possibly Rapido but not sure what pistons they are using ?
a coupe of guys on the board have had this work done. DC being one of them.
ping him a private message.
don't know why you couldn't have the same handling on a 996 though.
any way the choice is yours.
be aware though any money you put in to it will be very hard to recoup
but you are probably aware of that already

[khushy]

with an 853cc engine - what a tool!!!

The bike was fantastic and pulled like a train from just under 3000rpm right up to the red line - WELL WORTH THE MONEY in my opinion.

Mine had a 50mm Ti system and a JHP chip.

Had NO reliability issues at all.

Go for it - you will absolutely love it - I did!

Khushy

[khushy]

a 748 with a big bore conversion is COMPELETLY different to a standard 916/996 in terms of character - and thats what its all about at the end of the day.

The revvy nature of the 853 is what did it for me - I loved it - very exciting!

A 916/996 was just a bit boring - comparitively speaking of course.

Khushy

[JDR]

Thanks for that Phil that was one of my concerns was that it won't be a 748R any more

[Chris Wood]

Personally, I'd leave it!

Get the engine sorted properly, powercommander, nice pipes, light weight wheels, body work, etc...

Ride it properly and enjoy blowing away the 916/996 masses.

No need to mess it about completely.

Or go for 748RS heads, now that exciting!

[Chrisiball]

HI JDR
I have 2 748Rs road anad track, ive had my road bike 2 years now and love it but darent take it to the track, so i bought a tatty track bike and rebuilt it how i wanted it. The good thing about it was it had a Sigma Full Monty job on the engine, now the difference between my road and track bike is amazing!!
It revs so crisp and sharp pulls like a missile with no holes in the power anywere, and the best bit is it hauls its arse past 916s down the straights!! As people may have noticed at the DSC tracdays at cadwell a few weeks ago!! Yep that red ducati with the 29s on the tail was a 748!!
What they do with the full monty is basically a full service but while the engines apart they check and set the tolerences perfectly, set the squish and cam timing, fit ultimap chip and set it up on a dyno.
Iam seriously contemplating taking my road bike and having the full monty done on that.
Also thought about 853ing the track bike but both sigmas spec sheet and cost for this job is astronomical!! claiming about 130hp at the wheel, and £2000 out your back pocket!!
Well worth checking out the full monty job tho!!

[mbracing748]

When I had a 748sps with 50mm headers & terms, trick parts and chip I was also running the Big bore kit. The kit was great, faster than a 996 down the straight at donnington - fantastic....
BUT after 5K miles one of the pistons broke up and the other one was showing signs of cracking (I do have a picture if interested). I had to have a full engine rebuild. The only thing I would suggest is get the pistons / engine checked out at intervals. I've been told by a few Ducati mechanics that this failure on the early kits is not that uncommon.

Would I do it again.. HO YES!!

[khushy]

not being funny - but in between getting the bike and it blowing up - did you bin it? (or was it binned before you got it?)

I have heard that if the bike has been binned - it wont be long for this world because of the damage done whilst on its side, running and starving of oil!!!!

Khushy

[mbracing748]

can see your point but no crashes, no serious wheelies never on it's side, apart from going around corners.
The kit was fitted whilst I owned the bike. Let’s just say I wasn't impressed with the quality of casting of the piston.

[Chrisiball]

After being on its side its normally the main or big ends that go due to oil starvation if its bein revving whilst on its side, I believe Sigma or Nelly at cornerspeed fit Pistal pistons!

[mbracing748]

Sorry I'm so sad, here is a picture....... I would still buy another kit.

[Monty]

JDR, ping butch890 a message he has an 890 748R-it's a missile.
Oh, and welcome to the board.

John

[JDR]

Hi Monty Thanks for info will give butch a try