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  • Category: Motorcycles
  • Founded: Feb 24, 2001
  • Language: English
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Messages 13436 - 13465 of 24701   Oldest  |  < Older  |  Newer >  |  Newest
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#13436 From: "Paul" <herrmannpaul@...>
Date: Mon May 7, 2007 9:15 pm
Subject: Re: Lohmann engine
laverdaspirit
Send Email Send Email
 
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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#13437 From: Ian <iwd@...>
Date: Tue May 8, 2007 12:19 am
Subject: Re: TZ250 needs an engine
iwd@...
Send Email Send Email
 
>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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#13438 From: Ian <iwd@...>
Date: Tue May 8, 2007 12:24 am
Subject: Re: YZF250 rings in XS650 Yamaha
iwd@...
Send Email Send Email
 
>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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#13439 From: Ian <iwd@...>
Date: Tue May 8, 2007 12:28 am
Subject: Re: TZ250 needs an engine
iwd@...
Send Email Send Email
 
>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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#13440 From: Ian <iwd@...>
Date: Tue May 8, 2007 1:05 am
Subject: Re: YZF250 rings in XS650 Yamaha
iwd@...
Send Email Send Email
 
>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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#13441 From: "Charles Finney" <finneys@...>
Date: Tue May 8, 2007 2:10 am
Subject: Re: YZF250 rings in XS650 Yamaha
bk350mz
Send Email Send Email
 
This constitutes good news from my perspective.  Thanks.   On a different note, any insight into the max rpm or mean piston speed in the YZF250? 

Back of the envelope measurements indicate the YZF rod/stroke ration to be something like 1.75, the XS with the pin to crown of the YZF would be 2.0.  Just eyeballing the crown height (material above the crown) leads me to believe it is feasible to get a piston done in 250g.  I haven't a clue about the maths, however I'm thinking that in a street motor where the objective isn't horsepower, but rather a smoother and better performing XS that this should be workable.  The XS stroke at 7500 rpm gives a piston speed of 3650 fpm, I suspect the YZF has a piston speed of 4200+ fpm.  Have I missed anything fundamental?

Maybe put another way, this is a street bike project, all out performance isn't the goal.

Charlie in Iowa

On 5/7/07, Ian < iwd@...> wrote:


>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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#13442 From: "Michael Moore" <mmoore@...>
Date: Tue May 8, 2007 3:33 am
Subject: Re: YZF250 rings in XS650 Yamaha
mmooreeurosp...
Send Email Send Email
 
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

#13443 From: Ian <iwd@...>
Date: Tue May 8, 2007 3:56 am
Subject: Re: YZF250 rings in XS650 Yamaha
iwd@...
Send Email Send Email
 
>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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#13444 From: "Otto Nikolaus" <otto.nikolaus@...>
Date: Tue May 8, 2007 9:05 am
Subject: Re: TZ250 needs an engine
nikyzf
Send Email Send Email
 
I'd forgotten that they were Guzzis too. I always thought the Guzzi 250 should have been a V50-style V-twin. The V50 was about the same weight as the Honda 250 twin. There was also a Guzzi 250 2s twin I seem to remember.

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

Otto



On 08/05/07, Ian < iwd@...> wrote:

>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.



#13445 From: "Rick Denoon" <rdenoon@...>
Date: Tue May 8, 2007 1:23 pm
Subject: Re: YZF250 rings in XS650 Yamaha
rickd4004
Send Email Send Email
 
 
No experience with them, just came accross their website.
 
Rick
 
PS Dependign on how far you want to drive, a CB400F can be torn down and stuffed in a car (even a small car, frame/forks in back seat, engine/else in trunk) in about 4 hours
 
 
----- Original Message -----
From: Ian
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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#13446 From: "Rick Denoon" <rdenoon@...>
Date: Tue May 8, 2007 1:24 pm
Subject: Re: YZF250 rings in XS650 Yamaha
rickd4004
Send Email Send Email
 
Sorry about that last message, replied to the wrong email.
 
Rick
 
 
----- Original Message -----
From: Ian
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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#13447 From: "Michael Moore" <mmoore@...>
Date: Tue May 8, 2007 1:49 pm
Subject: re: 254 Benelli
mmooreeurosp...
Send Email Send Email
 
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

#13448 From: "Peter" <crazypj10@...>
Date: Tue May 8, 2007 2:28 pm
Subject: Re: 254 Benelli
crazypj10
Send Email Send Email
 
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

#13449 From: "aaron warner" <aarwar916@...>
Date: Tue May 8, 2007 5:29 pm
Subject: Re:TZ250 with RZ350 engine
aarwar916
Send Email Send Email
 
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#

#13450 From: john fisher <john@...>
Date: Tue May 8, 2007 6:00 pm
Subject: Re: TZ250 needs an engine
byrd_fishers
Send Email Send Email
 
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
>

#13451 From: "greg123452003" <greg123452003@...>
Date: Tue May 8, 2007 10:45 pm
Subject: Re: TZ250 needs an engine
greg123452003
Send Email Send Email
 
--- 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.

#13452 From: Ian <iwd@...>
Date: Wed May 9, 2007 12:45 am
Subject: Re: TZ250 needs an engine
iwd@...
Send Email Send Email
 
>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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#13453 From: Marin California <marinca555@...>
Date: Wed May 9, 2007 9:35 am
Subject: Re: TZ250 needs an engine
marinca555
Send Email Send Email
 
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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#13454 From: "Simon Darnton" <simon@...>
Date: Fri May 18, 2007 3:46 pm
Subject: Engine ideas
darntsa
Send Email Send Email
 
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

#13455 From: "Peter" <crazypj10@...>
Date: Fri May 18, 2007 6:24 pm
Subject: Re: Engine ideas
crazypj10
Send Email Send Email
 
Suzuki GZ/GN 250?
PJ

#13456 From: Simon Darnton <simon@...>
Date: Mon May 21, 2007 10:49 am
Subject: Re: Engine ideas
darntsa
Send Email Send Email
 
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

#13457 From: "Michael Moore" <mmoore@...>
Date: Wed May 30, 2007 5:34 am
Subject: Squish vanes?
mmooreeurosp...
Send Email Send Email
 
"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

#13458 From: GStarRon@...
Date: Wed May 30, 2007 1:41 am
Subject: Re: Squish vanes?
GStarRon@...
Send Email Send Email
 
In a message dated 5/29/2007 10:35:08 PM Pacific Daylight Time, mmoore@... writes:

"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


Geee, and all those nice sharp edges.... Hmm..... no thanks...

Ron



**************************************
See what's free at http://www.aol.com.

#13459 From: Greg Summerton <gregss@...>
Date: Wed May 30, 2007 8:54 am
Subject: Re:Squish vanes?
gregsummerton
Send Email Send Email
 
Hmmm....looks like someone had hell problems machining the damned thing!!!!
Looks like chatter to me........lol
Greg

#13460 From: "Tiny" <generatorshovel@...>
Date: Wed May 30, 2007 11:02 pm
Subject: Ignition advance 600/4
generatorshovel
Send Email Send Email
 
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

#13461 From: "RohanB" <newboltz333@...>
Date: Wed May 30, 2007 11:13 pm
Subject: Re: Ignition advance 600/4
newboltz333@...
Send Email Send Email
 
>>>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. ???

#13462 From: "Ernest Buckler" <ebuckler@...>
Date: Thu May 31, 2007 5:47 am
Subject: Air cleaner foam, in bulk, source for?
rekumbonut
Send Email Send Email
 
Anyone know where I can buy a sheet of air-cleaner foam?  There was a time I knew these things, but it's been a while.  Can't use the std pods, am making a complete airbox for an odd shape.   What type of open cell foam should I be looking for, spec wise?  In the old days I just bought "the stuff" that was used for such things, didn't pay attention to details.
 
Thanks for any ideas and sources.
 
Ernest B.

#13463 From: msaw@...
Date: Thu May 31, 2007 7:27 am
Subject: Re: Ignition advance 600/4
kwikkwak2000
Send Email Send Email
 
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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#13464 From: Ken Augustine <kineticanalysis@...>
Date: Thu May 31, 2007 8:14 am
Subject: New e_address for Ken Augustine
Kineticanalysis
Send Email Send Email
 
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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#13465 From: "Otto Nikolaus" <otto.nikolaus@...>
Date: Thu May 31, 2007 10:58 am
Subject: Re: Ignition advance 600/4
nikyzf
Send Email Send Email
 


On 31/05/07, RohanB <newboltz333@...> wrote:
>>>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. ???

Agreed. It's not crap at all, just lower octane. I would argue that lower octane, just like tightened emission laws, has forced big improvements in engine design. Quite often in the past, poor design, especially of combustion chambers, was masked by using high-octane fuel.

Otto


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