ESE's works engine tuner

[Frits Overmars]

If I recall it correctly, mr. Ryger his primary goal was initially to make a clean 2 stroke cycle by separating top and bottom from each other. May I assume that he didn't care about efficiency at first then, but purely tried to remove the oil from the mixture? The increased efficiency then came as surprise with the power increase?

His primary goal was indeed to remove the oil from the mixture. The power and the efficiency came as a pleasant surprise.

[mr bucketracer]

His primary goal was indeed to remove the oil from the mixture. The power and the efficiency came as a pleasant surprise.

direct injection , 4 stroke bottom end dry sump on plain bearing if it revs like they speak of , exhaurt the same , air pulled though like a 4 stroke but through reads, that bit i need to think more of ,

[seattle smitty]

Post #19963, photos, two pages back;

Again, Ken's list still only says "spacer-plate" while, somewhere back a ways, Frits said something close to "spacer/valve plate." Look at the photos. Looks to me as though there are two big "transfer" (?) passages that are fed from that plate, maybe, . . . so what's the deal with those???? Or is that only a big water jacket around the exhaust area, and not transfers at all??? (Laugh all you want, Frits, I'm anonymous here, nyah, nyah).

(EDIT) "Direct injection"?? Racer, I thought he said the engine has a carburetor, mandated by the kart rules, Yes? No?

[TZ350]

Well that was Mt Wellington today.

As I remember it, A grade finishing order was:-

Prelim:- 2T 2T 4T 2T 2T 2T 4T all the rest 4T's

Race 1- 2T 2T 2T 2T 2T 4T 2T all the rest 4T's

Race 2- 2T 2T 2T 2T 2T 4T 2T all the rest 4T's

Its starting to look like, that unless your peddling a well developed 2T you are going to struggle to run at the front of F4 A grade.

And from Dave D

Hi there,
The results of the 4^th round of the 15/16 season of AMCC bucket racing from Sunday are attached, for publication in the club newsletter.
Tim has already updated the website & Mylaps.

1516ABUC.xls

2 new lap records were set yesterday:
28.811 for Dave Manuell for F4 A grade clockwise
33.805 for Max Olsen for Sidecar clockwise

Regards,
David Diprose

Hi all,

The results of round 4 are now on Mylaps. You can see the full results here: http://www.mylaps.com/en/events/1214128

Congratulations to Nathanael Diprose who won both F4 races, but also congratulations to Dave Manuel who lowered his own clockwise F4 lap record to 28.811 seconds while chasing Nathanael. This was just over a tenth of a second faster than his previous lap record in the clockwise direction and only five thousandths of a second slower than Aaron Hassan's anti-clockwise record! Also congratulations to Max Olsen and Wil Killip who have taken the clockwise sidecar lap record from Rick Ford and Henk Zeeven. Max and Wil are the first sidecar combination to dip into the 33 second bracket with a 33.805.

You can see the current championship standings by clicking on the following links:

F4: http://organisation.mylaps.com/champ...w.jsp?id=45999
B-Grade: http://organisation.mylaps.com/champ...w.jsp?id=45997
C-Grade: http://organisation.mylaps.com/champ...w.jsp?id=45998
F5: http://organisation.mylaps.com/champ...w.jsp?id=46000
Sidecars: http://organisation.mylaps.com/champ...w.jsp?id=46001

Tim

[TZ350]

Links within the link below to the back story.

Spent a happy afternoon checking out the balance of the new 48mm stroke NSR GP110 crank and the NSR cylinder port STA's with the 48mm crank.

Many thanks to Kickaha for the GN clutch.



Honda copy Monkey Bike primary gears are straight cuts which have the same C/C distance as the GP.

GN Clutch on the left and GP one on the right. Previously I had managed to squeeze an extra plate into the GP one. The original GP 6 plate clutch would slip under power, modifying it for 7 plates cured the slip.



The big gear is smaller than the original GN125 and GP125 helical gears.



Once the straight cut gear is fitted to the GN clutch it will spin faster, transmits the same power but the plates are subjected to less torque and the need for cramming in an extra plate to stop clutch slip.

The new GP/NSR110 is going to have straight cut primary gears and conventional clutch springs.

[husaberg]

Once the straight cut gear is fitted to the GN clutch it will spin faster, transmits the same power but the plates are subjected to less torque and the need for cramming in an extra plate to stop clutch slip.

The new GP/NSR110 is going to have straight cut primary gears and conventional clutch springs.

It will be transmiting more power as it will be losing a few % less from the former side thrust of the helical gears it will also be easier on the bearings WIN WIN

[ken seeber]

EVERYTHING SEEMS TO HAVE BEEN DONE BEFORE.

At the Bathurst motor museum, there is a neat collection of bikes, inc some 125 classics. One being a 1950 BSA Bantam racer. With a touch of early Oz ingenuity (pre Fletto stuff), this featured a 24/7 inlet in conjunction with the original piston port inlet. Also featured an exhaust system designed with the help of an early version of FOS exhaust software:



As an added bonus, they also had a bucket for you bucketeers:

[Frits Overmars]

3 x 3 = 6 ...
I learn new things here every day.

[breezy]

EVERYTHING SEEMS TO HAVE BEEN DONE BEFORE.

At the Bathurst motor museum, there is a neat collection of bikes, inc some 125 classics. One being a 1950 BSA Bantam racer. With a touch of early Oz ingenuity (pre Fletto stuff), this featured a 24/7 inlet in conjunction with the original piston port inlet. Also featured an exhaust system designed with the help of an early version of FOS exhaust software:



As an added bonus, they also had a bucket for you bucketeers:

good pictures Ken... hope you dont mind me posting pictures on bantam racing forum.

[philou]

Ryger

http://www.pit-lane.biz/t5235-2-stro...-by-tim-hickox

[breezy]

Ryger

http://www.pit-lane.biz/t5235-2-stro...-by-tim-hickox

just the crank set up then...

[Flettner]

Frits, some answers if you will. What happens with the ryger engine at part throttle in high reves, how does it respond?
This BMEP thing, apparent 207 psi at 17500 rpm (my calculation) how much of that figure is actual BMEP and how much is this figure influenced by the frctionlessness of the mechanical set up? In other words because the engine is so free running ( no rings touching the piston, no piston touching the bore ) the actual cylinder pressure might be quite low or at least lower than we think. Yes.

[WilDun]

3 x 3 = 6 ...
I learn new things here every day.

Frits,
Even people who label stuff in museums can sometimes be wrong, at least in this case it isn't exaggerated!
In my experience, as far as racing was concerned, the Bantam in most cases had a first gear which was suitable only for the paddock anyway. so 3 X 3 = 6 is reasonably correct here! (give or take a little).

BTW, I reckon the early Kreidler racers blatantly copied this machine's transmission system (by using 2 gearboxes!)

[ken seeber]

3 x 3 = 6 ...
I learn new things here every day.

Frits, good spotting. Probably cos we didn't have calculators in those days.

We'll say we saw that, but figured that they might have used only two of the ratios in one of the boxes.

Breezy,

Anything here is good to go. Found another couple:

[breezy]

Frits, good spotting. Probably cos we didn't have calculators in those days.

We'll say we saw that, but figured that they might have used only two of the ratios in one of the boxes.

Breezy,

Anything here is good to go. Found another couple:

thanks