Star

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Re: Star

Post by minetymenace »

beat, I don't understand
beat wrote:new metric size bearings and bushings
<201 :roll:
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Re: Star

Post by beat »

minetymenace wrote: Fri Jan 31, 2020 9:38 am new metric size bearings and bushings
yes, all the flywheel bearings are metric size now, - as they are smaller in outside diameter it needs bushings.
as I bought the flywheel in pieces and not balanced, and using a much shorter piston to compensate the 14 mm additional stroke:
this work is not made by myself, no, - it is done by Marcel Gerhard in Frauenfeld.
Gerhard Racing is a well known specialist for crankshafts and engines here around....

anyway:

The head
drilling the holes for the four long studs right trough ....
drilling the holes for the four long studs right trough ....
surching and preparing....
surching and preparing....
cuting space for the nut ....
cuting space for the nut ....
newly four nuts from topside holding head and barrel in place ( like B50 )
newly four nuts from topside holding head and barrel in place ( like B50 )
checking flywheel and piston for clearance
checking flywheel and piston for clearance
<216 <216

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Re: Star

Post by beat »

fitting new lightweight valves
fitting new lightweight valves
big ports for the old Goldie now...
big ports for the old Goldie now...
nice piston from Wössner
nice piston from Wössner
and go for measuring comp ratio
and go for measuring comp ratio
and unlucky, 8.2 : 1 is the result.
as I surch for around 9.5 : 1, the barrel has to be cut at the bottom by 1.7mm ...

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Re: Star

Post by Jack Gifford »

beat wrote: Sat Feb 01, 2020 8:30 pm ... the barrel has to be cut at the bottom by 1.7mm ...
And... custom shorter pushrods?
... "Bigger ports"... Different head? Or did you "carve out" the ports?
"Motley" bike history: Horex 400, 1940 HD 45 FH, HD Baja 100, '49 Indian Scout 440, Victor 441 Roadster, H*nda TL125, Guzzi V50, H*nda FT500, 400-4, NX250
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Re: Star

Post by beat »

hi Jack
Jack Gifford wrote: Sun Feb 02, 2020 6:09 am And... custom shorter pushrods?
... "Bigger ports"... Different head? Or did you "carve out" the ports?
yes, I think I have to make shorter pushrods. but how much shorter I will see when barrel is finely fit, same as head and cams.

about different head : Inlet is made wider by 4mm, exhaust I am scary to made because the ugly crack in there gos right trough to the insert.
I just hope this old head is holding the next season because our budget of 10 000.- Sfr. for this winter preparing is already dried out by the new Reiger Shocks and this engine parts.

unlucky there is a endless list of wishes but NO endless money in the pocket.... :werd

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Re: Star

Post by beat »

barrel on the mill
barrel on the mill
cut off the feet gos faster than getting a higher piston....
cut off the feet gos faster than getting a higher piston....
next job is to shorten the pushrods to match the shorter barrel...
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Re: Star

Post by beat »

Pushrods shortened by 2.5 mm, - all is inside....
Pushrods shortened by 2.5 mm, - all is inside....
engine slowly fit in place....
engine slowly fit in place....
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Re: Star

Post by beat »

&lt;069 &lt;069

Engine is running !! ( Started by kickstarting, - no decompressor needed !! ) - and it comes by second kick !
but it is really hard to get it over TDC with this 650 ccm and 9.1 Comp Ratio, together with a new modern piston in a nicasyl coated barrel.

beat :grin: :grin: :grin:
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Re: Star

Post by minetymenace »

Well done. :ok

Have you ever considered electric start on a BSA single beat?
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Re: Star

Post by Jack Gifford »

Minety- are you joking? Or don't you read your own forums? :roll:
"Motley" bike history: Horex 400, 1940 HD 45 FH, HD Baja 100, '49 Indian Scout 440, Victor 441 Roadster, H*nda TL125, Guzzi V50, H*nda FT500, 400-4, NX250
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Re: Star

Post by minetymenace »

Irony is so wasted on our American cousins....
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Re: Star

Post by beat »

minetymenace wrote: Fri Feb 14, 2020 9:00 am Have you ever considered electric start on a BSA single beat?
well, - Motocross racing makes me feel 20 years younger, - so I do not waste any thinking about this.....

:lol: :lol: :lol:

starting to made my own Kill Switch today...
the housing, - a first go...
the housing, - a first go...
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Re: Star

Post by Jack Gifford »

minetymenace wrote: Sat Feb 15, 2020 4:37 pm ... Irony is so wasted on our American cousins...
The sarcasm emoticon was so wasted on minety... :roll:
"Motley" bike history: Horex 400, 1940 HD 45 FH, HD Baja 100, '49 Indian Scout 440, Victor 441 Roadster, H*nda TL125, Guzzi V50, H*nda FT500, 400-4, NX250
Aside from bikes: known as the "guru" of M/T hemi Pontiacs
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Re: Star

Post by beat »

Job finished
Job finished
and it is working good !
as a surplus, I can dismantle the all switch by every detail and give it a clean from time to time.... :cool:

next job:
new needle for the Mikuni TM 36-2
new needle for the Mikuni TM 36-2
now, as the engine is renewed, I come back again to the fine tuning of the carbi.
surching for A/F Ratio of 11.7 to 13.5
surching for A/F Ratio of 11.7 to 13.5
as commonly: a bit a longer process.....
as commonly: a bit a longer process.....
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Re: Star

Post by beat »

well, I came to this :
Needle mesurements for the Mit TM 36-2 carb
Needle mesurements for the Mit TM 36-2 carb
but, - it needs this modification as well:
the Trottle Valve No 4.0 needs cutting
the Trottle Valve No 4.0 needs cutting
I call it " the side gaps "
this side cutouts are in a place where it dos NOT affecting the idle position, means : NO additional air when slide is in idle position.
two slides: 4-0 with cuts, and 5.0 in original
two slides: 4-0 with cuts, and 5.0 in original
basicly, - this carbi is making too rich by around 15 % to 30% trottle pos. ( A/F Ratio of 10:1 to 11:1 :cry: )
so, - this is why it needs this slide modification.

IMO the only way to get a nice and even A/F R over the range from 0 % to 35 % trottle.

I will come up with the jetting after one ore two more testrunns.
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Last edited by beat on Fri Nov 13, 2020 9:16 pm, edited 2 times in total.
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Re: Star

Post by beat »

corona say thanks, I have the time to try to solve two more smal problems.

Gearbox and primary drive

at the gearbox, - in race mode, - it happens some time, I could not shift down from 2.end to first gear straight on.
I dropped in to zero position, - very ugly!
so I took out gearbox to get on to the cam plate.
filling the zero positioning by welding
filling the zero positioning by welding
and make a much smaller gap for zero position fixating.
smal position notch
smal position notch
I have not tested it now, but I hope it may help....

a other weak point is the Belt Drive, used for MX on a Side bike where the cooling of the clutch and the belt is not easy to do.
on one hand, clutch and belt drive needed to be protected from mud and dust, on the other hand, some cooling is needed.
starting with a idea and a disk...
starting with a idea and a disk...
cutting some wings.... ( 6 pieces )
cutting some wings.... ( 6 pieces )
welding the wings in place....
welding the wings in place....
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Re: Star

Post by beat »

give the wings a hyper- aerodynamic form....
give the wings a hyper- aerodynamic form....
fit the wingwheel on to the crankshaft
fit the wingwheel on to the crankshaft
and drilling some holes in the primary cover to feed the turbine....
and drilling some holes in the primary cover to feed the turbine....
not tested as yet, but I guess, I can't do much wrong by this.
to see, is there a good air circulation now, it needs to run the engine longer and harder for a while.

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Re: Star

Post by SteveS »

Hi Beat

You never cease to amaze me with your ideas and innovations :thumb As Plato said 'Necessity is the mother of invention'.

Regarding the 'the wingwheel', it will be interesting to see how it performs with hard use. You may find you may have to adjust the angle of the vanes so that it acts more like an impeller and sucks the air in through the holes in the outer cover. You may also need to consider that if you pull the air in, it will also need to exit? Will you be fitting a fine mesh behind the holes you have drilled to stop ingress of dirt or would it block up too easily?

Good luck and keep safe
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Re: Star

Post by beat »

hi SteveS

I guess the Wings never have the right bend because the wheel will variate in Revs from 6 00 to 6 000 :grin:

the way out for the air is on the holes in the upper cfk plate and three slots in the clutch area.

a mesh would be fine, but I guess it will block by the mud :cry:

so I get to this solution :
air holes in open position ( no mudy weater )
air holes in open position ( no mudy weater )
air holes in closed position ( for cleaning , etc. )
air holes in closed position ( for cleaning , etc. )
and everything in place:
air cooled belt drive.....
air cooled belt drive.....
time will tell it is working or not.

BTW, the reason for all this work is, because I have reduced the amount of teeth on the flywheel gear from 34 down to 26 teeth.
means, - only 13 teeth are engaged with the belt now, - very few IMO. and if the belt is getting to hot, this teeth may break .
we will see....

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Re: Star

Post by skippy »

Don't suck any stones in the and put them under the belt.
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Re: Star

Post by minetymenace »

What stops the vent cover closing during a race beat? Can you get to the primary drive without removing the chair? I think your fan may whistle....
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Re: Star

Post by beat »

skippy wrote: Wed Apr 01, 2020 12:01 am Don't suck any stones in the and put them under the belt.
you are right: stones in there will not be a good idea.
I am stil surching for a Ideal mesh....
minetymenace wrote: Wed Apr 01, 2020 7:55 am What stops the vent cover closing during a race beat? Can you get to the primary drive without removing the chair? I think your fan may whistle....
a ruber disk under the washer makes a good pressure to the cfk plate, so it is really hard to twist.
yes, the fan may whistle, - hopefully not louder than the Goldie is roaming.... :mrgreen:

a word about the starting procedure now:
bevor renewing the engine and by 500 cc, I not evan had the need to use the valve lifter.

now, with the 650 cc and renewed, - no chance to kick it over without decompressor.
and it is essential to give the valve the just right amount of lift and release it slowly.
came to this solution now and it is working excellent :
long lever valve lifter!
long lever valve lifter!
the lever is around 10 cm long and has a nice shuffle at the end for the thumb.
as it is possible to open the valve to much, - I am thinking about a lever stop <201

<214 pic will fallow....

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Re: Star

Post by beat »

end- stop for the decomposition lever
end- stop for the decomposition lever
DSCN1727.jpeg
and it works excellent :!:
no more surching the right amount of opening of the valve. it is easy to adjust with the length of the cable.

so, - pressing the shuffle up to the stop makes the engine easy to kick over and still it is some compression to feel.

beat :mrgreen: :ban
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Re: Star

Post by beat »

grace the lurgy is still on, I took the front end off.
a bit more travel in the suspension is needed
a bit more travel in the suspension is needed
took the flex in my hand and...
took the flex in my hand and...
cut off 3 cm on the headstock lower side
DSCN1814.jpeg
<216 <216 .......

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Re: Star

Post by beat »

get the bottom pice welder in place...
get the bottom pice welder in place...
cut the fork in pieces....
cut the fork in pieces....
adjusting tubes for welding yokes in place...
adjusting tubes for welding yokes in place...
a
and then the lower part of the fork in place...
and then the lower part of the fork in place...
made the spacer tubes and pointing it in place
made the spacer tubes and pointing it in place
final welding will be tomorrow....

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Re: Star

Post by beat »

Fork welded and treating with acid now
Fork welded and treating with acid now
everything back in place now...
everything back in place now...
DSCN1843.jpeg
and the result is: 230 mm way in the front suspension in state of 185 mm it was before .

...can't await the end of this lurgy <215 <215

&lt;069
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Re: Star

Post by beat »

well, the lurgy is partly banned so we can do training days now.

and on the second day it happened this, what it should NOT happened :

I missed the gear at the end of a fast straight section of the track.
in state of getting slower with one gear down, we came with far to much speed to the jump down in to the stone mine.
we survived the jump , but not the next narrow bend to the left.
well, the result was a deformed front axle, a deformed front swing arm and the fork stanchions are bend as well. :cry:
( the wheel - line is out by 4 cm )
the fraim suvived, the front wheel survived, the same the passenger and the rider.

so Goldie needs a compleat new front end....
DSCN1951.jpeg
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Re: Star

Post by Jack Gifford »

I'm glad you guys didn't hurt yourselves. Bikes can be repaired...
"Motley" bike history: Horex 400, 1940 HD 45 FH, HD Baja 100, '49 Indian Scout 440, Victor 441 Roadster, H*nda TL125, Guzzi V50, H*nda FT500, 400-4, NX250
Aside from bikes: known as the "guru" of M/T hemi Pontiacs
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Re: Star

Post by beat »

thanks Jack,
starting by zero
starting by zero
one pice after the other....
one pice after the other....
comparing and measuring a few docent time....
comparing and measuring a few docent time....
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Re: Star

Post by beat »

Bike is repaired:
again : bearings inside yokes...
again : bearings inside yokes...
it is coming closer...
it is coming closer...
comparing &quot; old &quot; on the left, -  and new on the right
comparing " old " on the left, - and new on the right
new swing arm with 20 mm Axle. ( 17mm before )
new swing arm with 20 mm Axle. ( 17mm before )
done.
done.
nice
nice
:cool: :cool:
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Re: Star

Post by beat »

and something more I have replaced in this time:
a new little Lathe !
a new little Lathe !
able now to cut any of Samuel Withworth^s threads...
able now to cut any of Samuel Withworth^s threads...
installed in place !
installed in place !
:grin:

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Re: Star

Post by skippy »

Nice lathe Beat. I can see some interesting things coming from your workshop. :thumb
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Re: Star

Post by Jack Gifford »

Nice machine!
I'm old-fashioned... Does a modern "geared lathe" use gears to relate spindle rotation to tool travel? Or is it done via computer?
"Motley" bike history: Horex 400, 1940 HD 45 FH, HD Baja 100, '49 Indian Scout 440, Victor 441 Roadster, H*nda TL125, Guzzi V50, H*nda FT500, 400-4, NX250
Aside from bikes: known as the "guru" of M/T hemi Pontiacs
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Re: Star

Post by beat »

skippy wrote: Tue Aug 04, 2020 12:38 am I can see some interesting things coming from your workshop.
I do hope so skipp. myself, I can't await to continues working on the B50 engine, and then building a new bike with side. :mrgreen:
Jack Gifford wrote: Tue Aug 04, 2020 6:30 am Does a modern "geared lathe" use gears to relate spindle rotation to tool travel? Or is it done via computer?
this lathe is still using gears. no computer inside, just a frequency transmitter to set revs.

as this machine is designed in Germany, but made in China, it is surpricingly handy to use.
together with some tools, it costs me 5 000.- SFr. , compared to a Swiss made thing it is 1 / 3 of the price......

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Re: Star

Post by minetymenace »

...........and then build a new combo :shock:

Tell us more!
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Re: Star

Post by beat »

minetymenace wrote: Wed Aug 05, 2020 7:59 am Tell us more!
:?: :?: :?: :?: :?: :?: :?: :?:

topic project bikes, LOBE 2 20-21 :!: :!: :!: :!:

if we don't crash the Goldie once more tomorrow on the training track, LOBE 2 will continues soon <216

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Re: Star

Post by beat »

been on the training track today.
enjoyed the new front fork and could do some good jamps !
and everything vent well :!:
the Goldie now
the Goldie now
good going bike it is
good going bike it is
:cool: :cool: :cool: <216 :lol: :lol:
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Re: Star

Post by Ian Hingley »

Hi beat

Are you allowed front disc brakes in vintage sidecarcross? Or are you competing in the same class as all the modern bikes?

Ian
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Re: Star

Post by beat »

Ian Hingley wrote: Thu Aug 06, 2020 9:34 pm Are you allowed front disc brakes in vintage sidecarcross?
yes Ian, disc brakes are allowed because some of them where used already around the year 1965
BTW, the disces fitted in the Goldie are self-made , cast in Aluminium and Chrome-Platted, in the year 1971.
very lightweight and good enough for sideMX use.
Ian Hingley wrote: Thu Aug 06, 2020 9:34 pm are you competing in the same class as all the modern bikes?
we count to the vintage class with this bike,- but often they do the race together with the modern ones.
( vintage gos up to the year of 1985 )
not very fair IMO, because the winner of the day is always by the modern ones to find..... :werd

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Re: Star

Post by beat »

:!: had to repair the old saddle:
crack in the lovely leader....
crack in the lovely leader....
sewing a new patch in place
sewing a new patch in place
crack in the lovely leader....
crack in the lovely leader....
like new :!: ( ore near by... :oops: :oops:
like new
like new
and small mods like the rear breack pedal shortened..
DSCN1995.jpeg
beat :lol: :lol: :lol:
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lovely, - isn't it ?
lovely, - isn't it ?
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