Another eng swap thread:(Edit: no longer considering EFI, upgrading 750 engine

[LowercaseJake]

OK, I've just purchased a Ducabike clear clutch cover (considering the enormous block of aluminum that thing appears to be cut from, and the onvious bling factor I consider the price I paid a bargain).

My question is this: I've only had the RHS cover off once for powder coat, but I seem to recall the wet pressure plate to be a one pice cast aluminum design.

Newer wet clutches have what appear to be a centerpiece with a trim ring.

I may opt to just powder coat it as well, but I'm wondering what I'd need to fit this hub:

https://motowheels.com/i-23899880-ducabike-billet-wet-clutch-hub-hypermotard-796-m620-695696796-s2r800-mts-620-scrambler.html

Can I swap over the necessary "trim ring" from an S2R800 and call it a day? in other words are the Ducati wet clutch components backwards compatible to any extent?

I already know I need more than just this hub. But I'm hoping I won't need to swap out the entire basket assembly etc, hoping it won't be a major PITA.

Does anyone make an aftermarket pressure plate only for a 2000 M750?

Are there aftermarket lightweight wet clutch baskets available to free up some more rotating weight?

Updates on the build: I've arranged for a nice multi angle valve job with enlarged valves and custom cut valve seats. Nibor's popcorn emoji is right on time....hey Nibor: you used Ferraci pistons in your 750, yes? along with a mild port/polish? any before/after commentary? any excess heat? running pump gas ok?

I absolutely trust Stu's input after doing soime homework on him, but at the same time there are people who absolutely love this engine, it has a somewhat cult like following. Seems tye most popular mod for the budget conscious is 800 heads with High Comp 750 pistons.

I know that's a lot of questions at one time, sorry. If buying the Ducabike hub and pairing it with a lighter basket or at least sourcing that outer ring becomes cost prohibitive I'll look into replacing everything with a wet slipper clutch, but I'm not a huge fan of slipper clutches. I like the grip of a traditional clutch and I enjoy doing hooliganish stuff like peeling out of a parking space next to a row of ugly Harley's and the "oh $hit" feeling of backing into corners.

[LowercaseJake]

Looking at parts diagrams now...the baskets appear to be entirely different. Too bad. But If a used wet clutch assembly comes up FS cheap enough I still might hop on it, IF it'll fit.

[LowercaseJake]

Ok, it looks like all I'd need to do is source a cheap used basket. The parts from the spible/track roller all the way to the slave cyl are identical.

[Speeddog]

The APTC semi-slipper clutch doesn't share any parts with the earlier conventional wet clutch.

You can swap out the entire clutch.

I've not seen nor heard of aftermarket pressure plates or baskets for the earlier conventional wet clutch.

I think you'll spend less money and get more power fitting a clean set of 695/800 heads.

[LowercaseJake]

The APTC semi-slipper clutch doesn't share any parts with the earlier conventional wet clutch.

You can swap out the entire clutch.

I've not seen nor heard of aftermarket pressure plates or baskets for the earlier conventional wet clutch.

I think you'll spend less money and get more power fitting a clean set of 695/800 heads.

Speedog I have a line on a set of those. Should I use the stock pistons or, if cheap enough, would high compression 750 pistons in the 800 heads be a good add on? The concern around the webz is the extreme loss of compression when doing this swap. I'd want as much compression as possible. And a oil cooler from an MH900 with the extra fin.

[Speeddog]

Yes, a set of Hi-comp 750 pistons will be well worth the effort.

Oil cooler fitment is pretty straightforward, just have to run the flapper valve with one.

[LowercaseJake]

Yes, a set of Hi-comp 750 pistons will be well worth the effort.

Oil cooler fitment is pretty straightforward, just have to run the flapper valve with one.

Oh, and - 695 heads are MUCH cheaper. Any big loss going with those instead? and I sssume the high comp 750 pistons will still fit?

Can I keep my current barrels?

[Speeddog]

695 and '07+ 800 heads are the same.

'06 and earlier 800 heads will have 8mm valve stems.

About 10 years ago Stuart and I did an '01 M750 with 695 heads and FbF 11:1 pistons, kept the same barrels.

[LowercaseJake]

695 and '07+ 800 heads are the same.

'06 and earlier 800 heads will have 8mm valve stems.

About 10 years ago Stuart and I did an '01 M750 with 695 heads and FbF 11:1 pistons, kept the same barrels.

Just to confirm those are 88mm pistons..

How'd that project turn out, Stu and SD?

[LowercaseJake]

Also as opposed to starting a new thread since all the smart ppl here have posted in this one..

I'm having some difficulty fitting 02 M750ie headers in my hooped frame. I chose these headers specifically bc they have built in collets and don't use the dreaded half rings I hate.

Is there a difference between the 2? I know the swingarms are slightly different but I didn't think it'd be dramatic enough to effect the headers. I'll rastle with em some more today.

[Howie]

Different part numbers.  I can't answer if they fit. but the "hoop" monsters are based on the 851 superbike frame, the '02 frame is based on the ST.  Do you have 750 carbie headers?

[koko64]

Maybe a slight difference in the bend for different swingarms/linkage?

[LowercaseJake]

Different part numbers.  I can't answer if they fit. but the "hoop" monsters are based on the 851 superbike frame, the '02 frame is based on the ST.  Do you have 750 carbie headers?

I do not have headers meant for a carbie bike, no. Considered ordering a used pair for comparisons sake but nothing rationally priced on eBay right now,

It's the exhaust ports where I'm concerned there might be a difference. In 02 M750 (and 620, the rare M800 etc) Ducati finally did away with those half rings in favor of a smarter setup....built in/non removable collars (you're not removing these without a cut/reweld). Just the header plus an exhaust crush gasket cinched down by a coller and 2 studs....the no brainer way.

Another way of confirming if they fit - are M750ie heads the same as carbie 750 heads? are the exhaust ports identical? if yes, I simply need to keep monkeying with these headers till they work. I have S&P/DP rearsets which isn't helping matters but such is life.

[LowercaseJake]

They fit. You need Ducati part number 80A062649 X2 "holder" plus 2 of the grommets, or use hardware store grommets. They fix to the engine case. Then it's a matter of monkeying around if you're using aftermarkets pipes (MIVV X-Cones for me...damn they look good). I highly recommend this as an upgrade...I really did hate those obnoxious half rings...

[koko64]