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Post Subject:

Any Vintage two stroke guru's out there?

Reply from: Mike Corey
Date: 30 Dec 2007, 21:52
Any Vintage two stroke guru's out there?

I just bought a restored 1974 Honda CR250M Elsinore. Now I need to buy a
new right foot. The kick starter on this thing has reared up and bit me
so many times in the last couple hours, I may never walk the same again.
Is there a trick to starting these things?

I've been told the timing may be off a bit, but don't have a spark plug
hole dial indicator to correctly set the timing. Could it be the timing,
or is it something else?

Point gap is correct at .012 and look to be new. Spark plug is fine. All
electrical connections look sound.

It does have a high compression Wiseco piston, so maybe I just have to
learn to live with this? Damn, I need to get some boots with a steel
shank in them.


"War is an ugly thing, but not the ugliest of things; the decayed and
degraded state of moral and patriotic feeling which thinks nothing is
worth a war, is worse." --- John Stuart Mill: 


Reply from: Joe
Date: 30 Dec 2007, 22:08
Re: Any Vintage two stroke guru's out there?

I'm certainly no expert, but the timing may indeed be off. If it fires off
before that piston is close enough to TDC, it can, and will kick back...

Solution? always park it at the top of a long hill and bump / jump start it
that way in second gear?

Good luck with it... Imagine if it was a Kawasaki H2 750 two stroke... :)

Joe in Northern, NJ - V#8013-R

Currently Riding The "Mother Ship"
http :// yunx,com /valk.htm

Ride a motorcycle in or near NJ?
http :// tinyurl,com /5apkg


"Mike Corey" <AWR7MMSTW@webtv,net > wrote in message
news:18558-47780525-231@storefull-3117.bay.webtv,net ...
I just bought a restored 1974 Honda CR250M Elsinore. Now I need to buy a
new right foot. The kick starter on this thing has reared up and bit me
so many times in the last couple hours, I may never walk the same again.
Is there a trick to starting these things?

I've been told the timing may be off a bit, but don't have a spark plug
hole dial indicator to correctly set the timing. Could it be the timing,
or is it something else?

Point gap is correct at .012 and look to be new. Spark plug is fine. All
electrical connections look sound.

It does have a high compression Wiseco piston, so maybe I just have to
learn to live with this? Damn, I need to get some boots with a steel
shank in them.


"War is an ugly thing, but not the ugliest of things; the decayed and
degraded state of moral and patriotic feeling which thinks nothing is
worth a war, is worse." --- John Stuart Mill:



Reply from: Wolfie
Date: 30 Dec 2007, 22:49
Re: Any Vintage two stroke guru's out there?

Joe wrote:
> I'm certainly no expert, but the timing may indeed be off. If it fires off
> before that piston is close enough to TDC, it can, and will kick back...
>
> Solution? always park it at the top of a long hill and bump / jump start it
> that way in second gear?
>
> Good luck with it... Imagine if it was a Kawasaki H2 750 two stroke... :)
>
> Joe in Northern, NJ - V#8013-R
>
> Currently Riding The "Mother Ship"
> http :// yunx,com /valk.htm
>
> Ride a motorcycle in or near NJ?
> http :// tinyurl,com /5apkg
>
>
> "Mike Corey" <AWR7MMSTW@webtv,net > wrote in message
> news:18558-47780525-231@storefull-3117.bay.webtv,net ...
> I just bought a restored 1974 Honda CR250M Elsinore. Now I need to buy a
> new right foot. The kick starter on this thing has reared up and bit me
> so many times in the last couple hours, I may never walk the same again.
> Is there a trick to starting these things?
>
> I've been told the timing may be off a bit, but don't have a spark plug
> hole dial indicator to correctly set the timing. Could it be the timing,
> or is it something else?
>
> Point gap is correct at .012 and look to be new. Spark plug is fine. All
> electrical connections look sound.
>
> It does have a high compression Wiseco piston, so maybe I just have to
> learn to live with this? Damn, I need to get some boots with a steel
> shank in them.
>
>
> "War is an ugly thing, but not the ugliest of things; the decayed and
> degraded state of moral and patriotic feeling which thinks nothing is
> worth a war, is worse." --- John Stuart Mill:
>
>

The trick was to prime the carb, and give the kickstart a kick or two
with the ignition off, until it was at the point when it was at max
compression. In other words, at its hardest to push down. Then turn on
the ignition, and give it a good firm kick. That always worked for
me.

--
Wolfie

Reply from: Noble Wolf
Date: 31 Dec 2007, 01:47
Re: Any Vintage two stroke guru's out there?

On Dec 30, 1:49=EF=BF=BDpm, Wolfie <Wolfie@FrenchGirl'sBoy.org> wrote:

> The trick was to prime the carb, and give the kickstart a kick or two
> with the ignition off, until it was at the point when it was at max
> compression. In other words, at its hardest to push down. Then turn on
> the ignition, and give it a good firm kick. That always worked for
> me.

Hey, this is not a BSA 441 Victor with an Amal Monobloc, it's a 2-
stroke with a Mikuni...



Reply from: Wolfie
Date: 31 Dec 2007, 04:58
Re: Any Vintage two stroke guru's out there?

Noble Wolf wrote:
> On Dec 30, 1:49?pm, Wolfie <Wolfie@FrenchGirl'sBoy.org> wrote:
>
>> The trick was to prime the carb, and give the kickstart a kick or two
>> with the ignition off, until it was at the point when it was at max
>> compression. In other words, at its hardest to push down. Then turn on
>> the ignition, and give it a good firm kick. That always worked for
>> me.
>
> Hey, this is not a BSA 441 Victor with an Amal Monobloc, it's a 2-
> stroke with a Mikuni...
>
>
Still worked on my Yammie 360 and a DT2...

--
Wolfie

Reply from: Bruce Richmond
Date: 30 Dec 2007, 22:30
Re: Any Vintage two stroke guru's out there?

On Dec 30, 3:52 pm, AWR7MM...@webtv,net (Mike Corey) wrote:
> I just bought a restored 1974 Honda CR250M Elsinore. Now I need to buy a
> new right foot. The kick starter on this thing has reared up and bit me
> so many times in the last couple hours, I may never walk the same again.
> Is there a trick to starting these things?
>
> I've been told the timing may be off a bit, but don't have a spark plug
> hole dial indicator to correctly set the timing. Could it be the timing,
> or is it something else?
>
> Point gap is correct at .012 and look to be new. Spark plug is fine. All
> electrical connections look sound.
>
> It does have a high compression Wiseco piston, so maybe I just have to
> learn to live with this? Damn, I need to get some boots with a steel
> shank in them.
>
> "War is an ugly thing, but not the ugliest of things; the decayed and
> degraded state of moral and patriotic feeling which thinks nothing is
> worth a war, is worse." --- John Stuart Mill: 

Does sound like it is advanced too far. Any markings to go by or does
it have to be set by piston position. Either way you should check
that the timing is set right. If it is advanced too far it would not
be good to run it that way even if you can get it started.

Bruce

Reply from: Noble Wolf
Date: 31 Dec 2007, 01:45
Re: Any Vintage two stroke guru's out there?

On Dec 30, 12:52=EF=BF=BDpm, AWR7MM...@webtv,net (Mike Corey) wrote:

> I've been told the timing may be off a bit, but don't have a spark plug
> hole dial indicator to correctly set the timing. Could it be the timing,
> or is it something else?

The stock carburetor has an enrichener device built into the side of
the carb, and it won't work right with the slide open.

Turn the idle speed screw all the way out so the slide is fully closed
before kicking the engine over.

The enrichener is supposed to supply enough fuel and air through the
bypass port to start the engine when it's cold. You shouldn't need to
open the throttle at all.

If the engine is still kicking back when it's warmed up, turn the idle
mixture screw clockwise about 1/2 a turn to richen up the idle mixture.

Reply from: Robert Bolton
Date: 31 Dec 2007, 03:28
Re: Any Vintage two stroke guru's out there?


"Mike Corey" <AWR7MMSTW@webtv,net > wrote in message
news:18558-47780525-231@storefull-3117.bay.webtv,net ...
I just bought a restored 1974 Honda CR250M Elsinore. Now I need to buy a
new right foot. The kick starter on this thing has reared up and bit me
so many times in the last couple hours, I may never walk the same again.
Is there a trick to starting these things?

I've been told the timing may be off a bit, but don't have a spark plug
hole dial indicator to correctly set the timing. Could it be the timing,
or is it something else?

Point gap is correct at .012 and look to be new. Spark plug is fine. All
electrical connections look sound.

It does have a high compression Wiseco piston, so maybe I just have to
learn to live with this? Damn, I need to get some boots with a steel
shank in them.
------------------------------------------------------
I'm not a guru, but two out of three isn't bad.

I had a '67 or '68 two-cylinder TC200 Suzuki back in the early 70s. It
had an oil injection system so I didn't have to mix oil. With my bike,
removing the points cover also exposed the static timing mark. The
rotating mark would appear through a little hole when it got close to the
static mark. I'd place a 12 volt test light across the points, line up
the timing marks, adjust the points plate till the points just opened,
then I'd check it by rotating the engine to see that the points opened
(test light lit up) just as the marks met.

It sounds like it must be firing if it's kicking back on you. Since it's
a two stroke, each compression is one that will fire, so as you probably
know you should relatively gently use the kickstart to get the piston up
against the compression, then give it a strong kick that follows through
the entire range of the kick start stroke. Similar to swinging an axe or
a bat, you follow through. That should help keep the kick start from
kicking back.

If yours is a single cylinder, then your piston is quite a bit bigger than
mine was. Perhaps you might want to retard the timing just a bit so it
doesn't kick back so hard? You might want to pull the plug to make sure
you've got spark, too.

For fuel, I pretty much always had to use the choke unless it was up to
temp.

Best of luck.
Robert



Reply from: Rider
Date: 01 Jan 2008, 07:06
Re: Any Vintage two stroke guru's out there?


"Robert Bolton" <robertboltondrop@gci,net > wrote in message
news:13ngkumsjgbo0ea@corp.supernews,com ...
>
> "Mike Corey" <AWR7MMSTW@webtv,net > wrote in message
> news:18558-47780525-231@storefull-3117.bay.webtv,net ...
> I just bought a restored 1974 Honda CR250M Elsinore. Now I need to buy a
> new right foot. The kick starter on this thing has reared up and bit me
> so many times in the last couple hours, I may never walk the same again.
> Is there a trick to starting these things?
>
My 1986 CR500 was twice as bad as a 250

You have to find top dead center for the piston.
Take out the spark plug and look at the piston
or look into the timing mark hole
When you can find top dead center by 'FEEL"
then drive it down and it will start first kick.
Good luck and wear boots with a real thick sole.




Reply from: Vito
Date: 01 Jan 2008, 17:23
Re: Any Vintage two stroke guru's out there?

"Rider" <sdfj@yahoo,com .hk> wrote
> My 1986 CR500 was twice as bad as a 250
>
Things can be worse. On a visit with an old '13 Rebels' (forerunner to
Boozefighters) I was asked to kick his newly restored Ariel Red Hunter - a
600cc single running alky at 14:1 compression. Lucky for me it started
easily and I was clowning around, balls on the aluminum tank, when my leg
contacted to Magneto hot lead ..... The old guys appreciated my
'jitterbug'.



Reply from: IRONDOG
Date: 31 Dec 2007, 07:49
Re: Any Vintage two stroke guru's out there?

It's the timing, you'll have to get it corrected. BTW, no such thing as
Wiseco high compression piston for a Honda CR250.

Mike Corey wrote:
> I just bought a restored 1974 Honda CR250M Elsinore. Now I need to buy a
> new right foot. The kick starter on this thing has reared up and bit me
> so many times in the last couple hours, I may never walk the same again.
> Is there a trick to starting these things?
>
> I've been told the timing may be off a bit, but don't have a spark plug
> hole dial indicator to correctly set the timing. Could it be the timing,
> or is it something else?
>
> Point gap is correct at .012 and look to be new. Spark plug is fine. All
> electrical connections look sound.
>
> It does have a high compression Wiseco piston, so maybe I just have to
> learn to live with this? Damn, I need to get some boots with a steel
> shank in them.
>
>
> "War is an ugly thing, but not the ugliest of things; the decayed and
> degraded state of moral and patriotic feeling which thinks nothing is
> worth a war, is worse." --- John Stuart Mill:
>

Reply from: Rob Kleinschmidt
Date: 31 Dec 2007, 08:07
Re: Any Vintage two stroke guru's out there?

On Dec 30, 12:52 pm, AWR7MM...@webtv,net (Mike Corey) wrote:
> I just bought a restored 1974 Honda CR250M Elsinore. Now I need to buy a
> new right foot. The kick starter on this thing has reared up and bit me
> so many times in the last couple hours, I may never walk the same again.
> Is there a trick to starting these things?
>
> I've been told the timing may be off a bit, but don't have a spark plug
> hole dial indicator to correctly set the timing. Could it be the timing,
> or is it something else?

Sounds like timing to me. I've never seen a two stroke kick
back very hard, even a 400. If the timing's off enough, it could
theoretically even run backwards.

Are you able to get it running at all ? If so, how well or badly
does it run after you've started it ?


Reply from: The Older Gentleman
Date: 31 Dec 2007, 10:42
Re: Any Vintage two stroke guru's out there?

Rob Kleinschmidt <Rkleinsch1216128@aol,com > wrote:

> Sounds like timing to me. I've never seen a two stroke kick
> back very hard, even a 400.

MZ250/300 singles were notorious for it.

>If the timing's off enough, it could
> theoretically even run backwards.

MZ250/300 singles could. Mine did!


--
K1100LT 750SS CB400F CD250 SL125
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 The bells, the bells.....
chateau dot murray at idnet dot com

Reply from: IdaSpode
Date: 31 Dec 2007, 17:41
Re: Any Vintage two stroke guru's out there?

On Mon, 31 Dec 2007 09:42:55 +0000, totallydeadmailbox@yahoo.co.uk
(The Older Gentleman) wrote:

>Rob Kleinschmidt <Rkleinsch1216128@aol,com > wrote:
>
>> Sounds like timing to me. I've never seen a two stroke kick
>> back very hard, even a 400.
>
>MZ250/300 singles were notorious for it.

As was the Yamaha SC500, not that you wanted to ride it if you could
actually get it started...

>>If the timing's off enough, it could
>> theoretically even run backwards.

>MZ250/300 singles could. Mine did!

As did my Bultaco Alpina.

DJ

Reply from: Rob Kleinschmidt
Date: 31 Dec 2007, 18:51
Re: Any Vintage two stroke guru's out there?

On Dec 31, 8:41 am, IdaSpode <not@home watching.tv> wrote:
> On Mon, 31 Dec 2007 09:42:55 +0000, totallydeadmail...@yahoo.co.uk
>
> (The Older Gentleman) wrote:
> >Rob Kleinschmidt <Rkleinsch1216...@aol,com > wrote:
>
> >> Sounds like timing to me. I've never seen a two stroke kick
> >> back very hard, even a 400.
>
> >MZ250/300 singles were notorious for it.
>
> As was the Yamaha SC500, not that you wanted to ride it if you could
> actually get it started...

I don't recall this behavior on the Yamaha 400s or Maicos.
Fading memory or differences between bikes I guess.


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Thread:
  Joe
   Wolfie
    Noble Wolf
     Wolfie
   Rider
    Vito
    IdaSpode
      IdaSpode
   oldgeezer
  SC Tom
    SC Tom
    IRONDOG
     Bruce Richmond
      IRONDOG
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        SC Tom