The Dogcati

[sugilite:Me]

I will put the seat away for you.
Attachment 355199

I cannot believe you are letting that seat go, you were just some exhaust wrap away from perfection

[husaberg]

I cannot believe you are letting that seat go, you were just some exhaust wrap away from perfection

Yeah there seems to be a bidding war going on on my PMs for it though.
but without the brown leather tape "handgrips" and the go fast nascar exhaust wrap its just looks miles too far away from "Cafe' chic"

[HenryDorsetCase]

https://www.trademe.co.nz/a/motors/m...ing/5033553412

I love this. I think I'll start a GoFundMe

[diesel pig]

I only called it rubber-band Ducati as it does Ducati owner's heads in.

[Grumph]

The unfortunate problem with belt drive cams is that they don't stay where you timed them.

I remember listening to a whinge from Dick Hurdeman about it. He'd put a strobe on the cam pulley and watched the timing move as the engine was revved.
There is a certain elasticity to those belts which you can do nothing about.
Except allow generous valve to piston clearances....

Many years back a 450 Duc from Oz came to a Sound of Thunder billed as the worlds fastest 450 Duc. It had a pantah head grafted on and was tuned
by the then leading OZ Ducati guys.
Mark Taylor on a bevel 450 beat it at Ruapuna -then travelled to Oz and repeated the dose at Oran Park.
And yes, i may have been involved with that one.

[husaberg]

The unfortunate problem with belt drive cams is that they don't stay where you timed them.

I remember listening to a whinge from Dick Hurdeman about it. He'd put a strobe on the cam pulley and watched the timing move as the engine was revved.
There is a certain elasticity to those belts which you can do nothing about.
Except allow generous valve to piston clearances....

Many years back a 450 Duc from Oz came to a Sound of Thunder billed as the worlds fastest 450 Duc. It had a pantah head grafted on and was tuned
by the then leading OZ Ducati guys.
Mark Taylor on a bevel 450 beat it at Ruapuna -then travelled to Oz and repeated the dose at Oran Park.
And yes, i may have been involved with that one.

I totally agree as evidenced by the later ducatis using spur drives like a rc30 or other kit kawsakis in the 90's
But the Dogcati is only a buget touring bike.
Also belt drive ducatis won heck knows how many more races than any bevel as people still needed to be able to afford to buy the homolgation bike.
Ducati stopped the bevel bikes as well as being heavy old and slow they were to expensive and time consuming to manufacture.
If the dogcati needs to go faster I can always wrap the exhaust or paint it red. although added the weight of the paint ......

[Grumph]

Ducati stopped the bevel bikes as well as being heavy old and slow they were to expensive and time consuming to manufacture.

The 450 had two complete crankcase/gearbox assemblies. Both with Carillo style rods and a locally made 2nd gear pair.
Shimming and setting those up from scratch was not a 5minute job....

The 750 bevels whan they came out were at the light end of what was on the market and in
the context of the period they weren't slow.

[husaberg]

The 450 had two complete crankcase/gearbox assemblies. Both with Carillo style rods and a locally made 2nd gear pair.
Shimming and setting those up from scratch was not a 5minute job....

The 750 bevels whan they came out were at the light end of what was on the market and in
the context of the period they weren't slow.

Yes but by the time that the 650sl had come along they were lighter smaller and nearly as fast. let alone the f1750. Heck The 750 paso was nearly as fast.


That 450 with the belt drive head must have had reversed cam direction, I remember they had to do that with RV1 alchemy.


On the Dogcati with only exhaust and minor injection/intake mods plus setting cams and squish, I expect to net 120HP perfect for mild fast touring I intend to do with the Dogcati. Plus some exhaust wrap and brown handgrips and brass rearview mirrors.


A second purchase below, even at half the original cost, it's perfect for fast touring on a gentleman's sports tourer.


With a different threaded nut, these fit almost all belt twins and V4s



As well as being a slipper, these cluches are 48 inner teeth to spread the load.
They also have a lightweight hub.

[F5 Dave]

The unfortunate problem with belt drive cams is that they don't stay where you timed them.

I remember listening to a whinge from Dick Hurdeman about it. He'd put a strobe on the cam pulley and watched the timing move as the engine was revved.
There is a certain elasticity to those belts which you can do nothing about.
Except allow generous valve to piston clearances....


. .

Variable Valve Timing! Swish.

[Grumph]

Variable Valve Timing! Swish.

Unplanned however.

I've never been entirely sure the Britten valvetrain problems were from inadequate head drainage.
The official story was that the cam folower buckets were hydraulicing and it would break belts
or hit valves - the sequence was never established afaik.

I suspect they simply didn't appreciate how much the valve to piston clearance changed
as the cam timing moved.

Must ask Rob Selby next time I see him.

[F5 Dave]

Yes but by the time that the 650sl had come along they were lighter smaller and nearly as fast. let alone the f1750. Heck The 750 paso was nearly as fast.


That 450 with the belt drive head must have had reversed cam direction, I remember they had to do that with RV1 alchemy.


On the Dogcati with only exhaust and minor injection/intake mods plus setting cams and squish, I expect to net 120HP perfect for mild fast touring I intend to do with the Dogcati. Plus some exhaust wrap and brown handgrips and brass rearview mirrors.

.

What, are you intending to bore it out to 1400?

[HenryDorsetCase]

What, are you intending to bore it out to 1400?

do eeeeeeet

[husaberg]

Unplanned however.

I've never been entirely sure the Britten valvetrain problems were from inadequate head drainage.
The official story was that the cam folower buckets were hydraulicing and it would break belts
or hit valves - the sequence was never established afaik.

I suspect they simply didn't appreciate how much the valve to piston clearance changed
as the cam timing moved.

Must ask Rob Selby next time I see him.

my understanding was as it had one belt it had too many changes in direction in the original set ups
the first ones that were sold had an update to have two separate shorter belts one per bank.
less turns and less wanting to straighten out like a chain. That was the theory I heard?




(Jim Hunter?)
Pretty sure its in the Sports rider article?
Funny enough with the inaccurate belt vs gear I remember flettner spoke of a system that used this factor as a form of variable timing.

To my mind belt allow a lighter simpler engine esp compared to gears.
Chains are not the answer either as we are struggling to get 5 hours out of the motards cam chain.

What, are you intending to bore it out to 1400?

You need to raise your bid on that seat Dave....

ps As its a touring bike so it only needs to go to 916cc
As they as std do 55mpg at 100MPH.
I am thinking of some pod filters though. but I think I will go with a big arse car one and big arse bell mouths
I have however ordered 2 different power bands off the internet though.



I have also decided on the colour of the exhaust wrap

[sugilite:Me]

You need to raise your bid on that seat Dave....

More to the magnificence of that seat, looking at the stitched creases on it, it's creator must of given at least 16 big pushes when giving birth to that majestic brown work of art

Loving this thread man, stay keeping us updated!

[husaberg]

More to the magnificence of that seat, looking at the stitched creases on it, it's creator must of given at least 16 big pushes when giving birth to that majestic brown work of art

Loving this thread man, stay keeping us updated!

Cheers that encouragement might help raise your bid on that seat.
TBH I assumed the seat was an off the self Cafe' seat (and maybe it's is based on one) but its pure Custom fiited to the docati and even was retained by a solid brass fastener That looked like it same from a old folder or set of drawers or something. So it's completely one of a kind.

I do intend at some stage running a live Auction for it. Especially considering its now gone international on KB.
I plan to have a wee play with dogcati this weekend and slowly strip away some more of that CAFE/Streetfighter/Bobber Patina.

I once striped down a RD250 once that has a race seat sheaved in actually house carpet. it had race numbers and all and weighed a ton from all the bog/paper mache. But someone once loved it. just like the Dogcati.
This project has a time limit though.

Whilst it would be cool to put these on, I am saving them for another project.
These are for some the holy grail 4v Ducati rotor fully floating cast iron gen brembo.
Although personally even I think they are OTT for an "st s4orts tourer"

But without the "brownseat" it does need to have something special