Thanks Ian and Bruce! Yeah this is not whiplash territory!

Hey Bruce...please tell me more about what you are up to with these
powered pushys. Mail me directly.

thansk
Paul

--- In mc-engine@yahoogroups.com, Bruce Rodda <brucerodda@...> wrote:
>
> Yep Weird Pushys is my go
>
> Have you tried the NACC Archieve its a great resource for us cool
pushy non pedelers
>
>  http://www.users.globalnet.co.uk/~pattle/nacc/arcindex.htm
>
>
> Good Luck with it just think a whole 18cc of compression ignition
power Ian you must be going weak at the knees at the thought of it
>
> ----- Original Message ----
> From: Ian <iwd@...>
> To: mc-engine@yahoogroups.com
> Sent: Friday, May 4, 2007 11:57:17 AM
> Subject: Re: Lohmann engine
>
>
> >Anyone out there have a link to technical info/drawings on the
Lohmann
> >compression ignition engine which was fitted to bicyles after the
war.
>
> Bruce maybe ? He's into weird bicycle devices.
>
> Cheers IAN
>
> See www.drysdalev8. com for :
> - Drysdale 750-V8 Sports & 1000-V8 Cruiser
> - DRYVTECH 2x2x2 Experimental
> - Carberry Enfield 1000cc V-Twin
> - Drysdale Hillclimb Open Wheeler
>
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>Benelli also made one. I think it was the only 250/4 sold in the UK.


I have one sitting in my garage ( belongs to a mate ) in Moto Guzzi livery.
( Guzzi actually manufactured the motor )


>  I don't think it was even as fast as the best 4s twins, let alone
> the 2s twins and triples.


Yep - you didn't want to be in an hurry, but they sound great.

BTW - It's for sale if anyone is interested.



Cheers           IAN


See www.drysdalev8.com for :
- Drysdale 750-V8 Sports & 1000-V8 Cruiser
- DRYVTECH 2x2x2 Experimental
- Carberry Enfield 1000cc V-Twin
- Drysdale Hillclimb Open Wheeler


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>I'm still in the dark as to the implications of running the YZF
>rings on the cast liner and what viable options might be to improve
>the longevity/integrity if necessary.


I run YZF600 pistons in my 1000-V8 ( originally a coated alloy bore ),
I run my own cast iron liners in the V8 - with no problems.



Cheers         IAN


See www.drysdalev8.com for :
- Drysdale 750-V8 Sports & 1000-V8 Cruiser
- DRYVTECH 2x2x2 Experimental
- Carberry Enfield 1000cc V-Twin
- Drysdale Hillclimb Open Wheeler


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>If any Chinese entrepreneurs are listening: copy TZ frame and size
>so components are interchangeable; copy 660 Yamaha
>motor or Rotax or KTM and size so those parts are interchangeable;


Your wish..............

There are 2 big singles due for production in China shortly, one is the
now superceded BMW 650 ( a joint venture with BMW ), the other is
a cross between a 660 Yam and said BMW, penned by some guy in
Austria ( I was told ).



Cheers        IAN


See www.drysdalev8.com for :
- Drysdale 750-V8 Sports & 1000-V8 Cruiser
- DRYVTECH 2x2x2 Experimental
- Carberry Enfield 1000cc V-Twin
- Drysdale Hillclimb Open Wheeler


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>I run YZF600 pistons in my 1000-V8 ( originally a coated alloy bore ),
>I run my own cast iron liners in the V8 - with no problems.



That wasn't very clear...........the YZF600 pistons originally ran in a
coated bore, and now I run them in cast iron.



Cheers      IAN


See www.drysdalev8.com for :
- Drysdale 750-V8 Sports & 1000-V8 Cruiser
- DRYVTECH 2x2x2 Experimental
- Carberry Enfield 1000cc V-Twin
- Drysdale Hillclimb Open Wheeler


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Charlie,

about 13.5K seems to be where the 250s cut off

http://www.eurospares.com/graphics/engine/250moderndynopage.jpg

http://www.eurospares.com/graphics/engine/250Fmxbhp.jpg

The Yamaha has a 53.6mm stroke, so the stock rod ratio is 1.7444

cheers,
Michael

>about 13.5K seems to be where the 250s cut off
>
>The Yamaha has a 53.6mm stroke,


24 m/s MPS on a 1.75:1 rod, that's getting busy.


Cheers       IAN


See www.drysdalev8.com for :
- Drysdale 750-V8 Sports & 1000-V8 Cruiser
- DRYVTECH 2x2x2 Experimental
- Carberry Enfield 1000cc V-Twin
- Drysdale Hillclimb Open Wheeler


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----- Original Message -----

From: Ian

To: mc-engine@yahoogroups.com

Sent: Monday, May 07, 2007 10:56 PM

Subject: Re: YZF250 rings in XS650 Yamaha

>about 13.5K seems to be where the 250s cut off
>
>The Yamaha has a 53.6mm stroke,

24 m/s MPS on a 1.75:1 rod, that's getting busy.

Cheers IAN

See www.drysdalev8.com for :
- Drysdale 750-V8 Sports & 1000-V8 Cruiser
- DRYVTECH 2x2x2 Experimental
- Carberry Enfield 1000cc V-Twin
- Drysdale Hillclimb Open Wheeler

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----- Original Message -----

From: Ian

To: mc-engine@yahoogroups.com

Sent: Monday, May 07, 2007 10:56 PM

Subject: Re: YZF250 rings in XS650 Yamaha

>about 13.5K seems to be where the 250s cut off
>
>The Yamaha has a 53.6mm stroke,

24 m/s MPS on a 1.75:1 rod, that's getting busy.

Cheers IAN

See www.drysdalev8.com for :
- Drysdale 750-V8 Sports & 1000-V8 Cruiser
- DRYVTECH 2x2x2 Experimental
- Carberry Enfield 1000cc V-Twin
- Drysdale Hillclimb Open Wheeler

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Also badged as Guzzis and Motobis.  There is one that has been
allowed to run (as a Benelli) in the AHRMA 250GP vintage class
(and I think that is a bad move as it is clearly out of the period and
has no relationship to the Benelli quattro race bikes) but I think that
it has not been possible to bring it to a very high state of tune.  As
with the small-block Guzzis, the 254 was NOT designed to be a rip
snorter of a high-powered engine

http://www.eurospares.com/graphics/mb254_1.jpg
http://www.eurospares.com/graphics/mb254_2.jpg

Those are photos of a Motobi 254 Competizione that a fellow in
Bangkok sent me

The Benelli Sei was a bit more useful on the track.  Here's the
custom-chassised Motobecane-sponsored endurance racer

http://www.eurospares.com/graphics/mocb1.jpg

cheers,
Michael

I remember they were a bit of an overweight underpowered slug. Seemed
like a good idea, making a miniature 500F but it didn't shrink well.
PJ

not to oversimplify things, but why not a tzr250 motor if you're thinking of
a parallel twin 2smoke?  perfect for the application - as far as I know they
were heavily based on the parallel tz motor...

I've always wanted to pull a "millyard" and make a 375cc triple out of 2 of
those! around here you can insure anything under 400cc dirt cheap - 80-90hp
or not!

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n-CA#

dang thats good news. Its not often that my bizarre tastes actually coincide
with people who manufacture things...
Or they are nuts too.

Ian do let us know about this stuff. You seem to have access to the China
market. I hope they are good and they get
imported...

JF

Ian wrote:
>
>
>
>  >If any Chinese entrepreneurs are listening: copy TZ frame and size
>  >so components are interchangeable; copy 660 Yamaha
>  >motor or Rotax or KTM and size so those parts are interchangeable;
>
> Your wish..............
>
> There are 2 big singles due for production in China shortly, one is the
> now superceded BMW 650 ( a joint venture with BMW ), the other is
> a cross between a 660 Yam and said BMW, penned by some guy in
> Austria ( I was told ).
>
> Cheers IAN
>

--- In mc-engine@yahoogroups.com, Ian <iwd@...> wrote:
> There are 2 big singles due for production in China shortly, one is the
> now superceded BMW 650 ( a joint venture with BMW ), the other is
> a cross between a 660 Yam and said BMW, penned by some guy in
> Austria ( I was told ).

One is already in production -
Engine
Type 650cc liquid-/oil-cooled w/fan, SOHC four-stroke; 5-valve
Bore x Stroke 100mm x 84mm
Compression Ratio 9.1:1
Carburetion Mikuni 42mm BSR
Ignition DC - CDI
Starting System Electric
And there is work to make a 1300 V-twin version.

>Would there be any scope for getting more power from the 250/4? It
>must have been very understressed.


Crank is the main problem, only 3 main bearings I think, and
whimpy little pin sizes.



Cheers        IAN



See www.drysdalev8.com for :
- Drysdale 750-V8 Sports & 1000-V8 Cruiser
- DRYVTECH 2x2x2 Experimental
- Carberry Enfield 1000cc V-Twin
- Drysdale Hillclimb Open Wheeler


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This has to be scary as when decelerating, every big
bore 2/S I ever had would fire once on its very own
about every hundredth revolution and launch everything
forward about 20 feet.   That usually happened to me
just as I got to the obstacle for which I was
decelerating in the first place.
Ken A

--- Michael Moore <mmoore@...> wrote:

> If you are going to make your own 2 smoke v-twin you
> may as well
> go big on the donor engine with a 700 Intimadator
> from ATK USA:
>
> http://www.atkusa.com/ProductsIntimidator.aspx
>
> cheers,
> Michael
>
>
>




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Hey all,

For a while now I've been playing around with some stuff on reactive
motorcycle silencers in my garage and I've had some really positive
results.

What I'm now looking to do is build a small engine noise dyno that
uses a small 4 stroke bike engine. Essentially the engine will sit in
an insulated box that contains sound measurement equipment. At present
the best option is probably some type of single cylinder engine

The type of thing I need should be electric start and preferrably has
a rev counter output. It needs to about 8500 rpm and the higher
compression the engine has the better. Actual engine power is not too
much of an issue, of course, nor is its capacity.

The other thing is I'd like to avoid as much cost as possible and
therefore an engine I could walk into a scrap yard and pick up would
be ideal.

I'd be really grateful for any suggestions on engines and what bikes
they come from that would out there that would fit the bill.

Cheers,
Simon

Suzuki GZ/GN 250?
PJ

Peter wrote:

  >Suzuki GZ/GN 250?
  >PJ

Thanks Peter, yes, that might very well be ideal for the job. I'll have
a scour around because there's sure to be a few cheap ones knocking around.

Cheers,
Simon

"Our unique squish vanes increase efficiency by increasing the rate
of atomization of fuel."

http://mullengineering.com/files/1_graphics/563_pic1_400.jpg

That's a modified head for a Banshee.  I've never heard of "squish
vanes" before.  It seems like it wouldn't be long before carbon
would "de-vane" the combustion chamber.

cheers,
Michael

Hmmm....looks like someone had hell problems machining the damned thing!!!!
Looks like chatter to me........lol
Greg

Researching modern multi cylinder Jap bike tuning info online gets to
be a pain, especially when trying to find any reference to ignition
timing settings.
   My findings tend to indicate a full advance setting of 47 degrees
BTDC , which seems an awfull lot considering the crap fuel we are
forced to burn these days.
Can anyone shed some more light on this ign timing thread for me?
Tiny

>>>considering the crap fuel we are forced to burn these days.

----------------

Some of the locals are getting 200+bhp/litre out of their double
turbocharged Nissans and Lexus and Toyotas and Subarus etc = fuel can't be
too bad. ???

I used to work with Sagem on the Triumph T806, otherwise known to the
public as the TT600 sports bike (600/4) . The combustion chamber was so
slow that we ran out of timing advance on the Control unit.
Unfortunately i don't have any of the software or calibration maps
anymore but the ignition for the engine ran a series of 3d maps of APS
(air per stroke) against engine speed. Idle no throttle was in the
region of 14 degrees Advance and 13000 rpm full throttle was maxed out
at 60 degrees.







Quoting Tiny <generatorshovel@...>:

> Researching modern multi cylinder Jap bike tuning info online gets to
> be a pain, especially when trying to find any reference to ignition
> timing settings.
>   My findings tend to indicate a full advance setting of 47 degrees
> BTDC , which seems an awfull lot considering the crap fuel we are
> forced to burn these days.
> Can anyone shed some more light on this ign timing thread for me?
> Tiny
>
>



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Everyone,

    I will be changing my yahoo e_address to the one
shown below.

    For anyone who wants me to have their contact
information in my new e_address book, please forward
to the e_address below, whatever data with which you
feel comfortable including time past which not to
phone you in the evening.   Thanx.

Ken Augustine
Kinetic Analysis
53B Mark Dr
San Rafael, CA  94903
415 472 4952 h, w, fx
kineticanalysis@...





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