ESE's works engine tuner

[F5 Dave]

They can work just fine, just have to get lucky with the needle I think

[2T Institute]

A good story to relate was when the BSL was first started at Philip Island.
We opened the pit door to find about 100 people waiting to see it.
It was started and I was hanging onto the throttle , blipping it to warm up.
King Kenny strode forward with his Team Roberts entourage in tow.He grabbed hold of the foot peg as i gave it a good rev.
Turning around to the team he said real loud, as he does " these cunts know more about engine balance than any of you fuckers " patted me on the back
with a wink and walked away.
Later in their pit I got to do the same thing - and it was scary how much the buzzing vibration actually hurt your hand.
Yes - I did ask for a job, but they had already contracted the NS500 designer to draw a new engine.

A PR master is Kenny , he actualy got 2 Japanese engineers Yoda-san and Oguma-san ex HRC and Yoda ex Yamaha(the irony) first thing they did was reduce the engine length by 50mm and that allowed a 50mm longer swingarm, which cured the chronic understeer. Then they started to get the Modenas going.

Would you go a triple again Wob or a twin 68X68.5 disc valve with twin discs like the Exactweld ?

[TZ350]

http://www.sportmotor.hu/motoros_kep...=pic&id=707616

Interesting series of photos of someones project where they are fitting a home made performance sleeve to their cylinder.

[wobbly]

A triple even more so now,as injection would make fitting the intake a doddle.
The weight advantage offset by the power that it is capable of making still means it is a great compromise,and it packages well with two up and one down as Honda did originally.
When you think back to McWilliams putting the Aprilia on pole at Philip Island this shows that the idea of a 250 bike with a heap of power is valid.
But the twin simply cant make enough power, and even with its weight advantage can never be the best choice for corner speed Vs straight line ability.

[richban]

A triple even more so now,as injection would make fitting the intake a doodle.
The weight advantage offset by the power that it is capable of making still means it is a great compromise,and it packages well with two up and one down as Honda did originally.
When you think back to McWilliams putting the Aprilia on pole at Philip Island this shows that the idea of a 250 bike with a heap of power is valid.
But the twin simply cant make enough power, and even with its weight advantage can never be the best choice for corner speed Vs straight line ability.

On the subject of 250's. If one had a say, a Honda MC28 engine and was wanting to make it go the best it could possible go. With head work port, pipe, carbs, ignition, What you reckon it could make at the wheel?

[F5 Dave]

Any thoughts on my emulsion tube shroud? Or rather carb body shroud?

[Ocean1]

Any thoughts on my emulsion tube shroud? Or rather carb body shroud?

Got a picture mister?

[husaberg]

Yamaha OW54

I remember TZ showing a pic of a Cagiva's inline disk many 100's of pages ago.

Here it is I wish I had the Autocourse full story
I had a little look on google as I had never seen or herd of it but came up empty.

and someone saying the Yam was a similar set up i guess this was it.
Only on a twin crank vee set up.



Kind of Konig like only bent and contra rotating twin cranks

The Suzuki 125's that you refer to are probably the 1977 air-cooled TR100 ( XR21) , TR125 ( XR24 ), plus the watercooled disk-valve 1978 RJ100 ( XR29 ) bikes.

These are documented in the Appendices of the book "Team Suzuki" by Ray Battersby. Claimed power output is 28.6 HP @ 11250 for the TR125 and 25 HP @ 11500 for the RJ100.

So TZ350's GP125 is still king !!

I missed this i guess it is the one Lozza mentioned.

[Muciek]

http://www.sportmotor.hu/motoros_kep...=pic&id=707616

Interesting series of photos of someones project where they are fitting a home made performance sleeve to their cylinder.

Simson engines here in europe are very popular check this projects also http://bikepics.com/members/przemas222/cylinder/ http://www.bikepics.com/members/chylo00/p13/ http://bikepics.com/members/nightfire007/p5/ , just few projects, you could find more here but language could be a barrier http://simsony.net/forumdisplay.php?f=25

[Neal]

On the subject of 250's. If one had a say, a Honda MC28 engine and was wanting to make it go the best it could possible go. With head work port, pipe, carbs, ignition, What you reckon it could make at the wheel?

At least 70hp , I had 69hp with the HRC ignition . Look for a mc21 gearbox as it has closer 4,5 & 6 gears .
Track bike or road bike ?

[husaberg]

http://www.sportmotor.hu/motoros_kep...=pic&id=707616

Interesting series of photos of someones project where they are fitting a home made performance sleeve to their cylinder.

might have Been sitting on this for a while.............
Guess you have seen it to......
http://forums.everything2stroke.com/...the-Shop/page3

[Forgi]

http://www.sportmotor.hu/motoros_kep...=pic&id=707616

Interesting series of photos of someones project where they are fitting a home made performance sleeve to their cylinder.

Hello Teezee!

It's amazing how small the world is! I personally know the owner of this moto and the cylinder as well. In my opinion it isn't a good construction at all, its STA values are also too low.
I only deal with simsons and I can tell you that such a huge cm3 (105cc) can not be made without compromise. 55 bore, 44 stroke. If you are interested in this topic just feel free to ask me!

You can find a video of the moto at this link:

http://www.sportmotor.hu/motoros_vid...b-proba-106063

[richban]

At least 70hp , I had 69hp with the HRC ignition . Look for a mc21 gearbox as it has closer 4,5 & 6 gears .
Track bike or road bike ?

Track only. It will be in a MC21 frame. To tell you the truth I still don't know if the engine is a 21 or 28. Will have my hands on it next week.

[F5 Dave]

Got a picture mister?

Good idea. That'insert ' contains pilot drilling and no way to remove.

[Ocean1]

Good idea. That'insert ' contains pilot drilling and no way to remove.

...and if you bore it in a lathe the wee pedestal is toast.

Any reason you couldn't do it in a mill, with a long slotting drill and the carb body in a dividing head? You wouldn't get the main bore beyond the pedestal done but you could either turn it over to do the other side or just fair it in by hand with a die grinder.