ESE's works engine tuner

[TZ350]

Exhaust Side Windows

[jasonu]

Bucket racing is not about what we are prepared to pay for a motor, but more about our collective knowledge, abilities, resources and to develop a class of racing that is both competitive and affordable

Is that right???

[bucketracer]

Neds 23rwhp Engine

After three years without a problem, Chambers is giving it a Birthday



Nothing to special, a real simple setup, still using the std carb and roughly polished but other wise unmodified inlet tract, other tech details were posted on page 200.

[richban]

Maybe team ESE could sponsor me on my RGV250. All you would have to do is make it go fast. I really like it but have no idea how to make it go good.

How come there are no 2 strokes at the front of F3?

I've Been watching Motogp classics. Got to love them 500's its got me inspired. Also rode a 50 last night and man it was fun.

[Yow Ling]

Maybe team ESE could sponsor me on my RGV250. All you would have to do is make it go fast. I really like it but have no idea how to make it go good.

How come there are no 2 strokes at the front of F3?

I've Been watching Motogp classics. Got to love them 500's its got me inspired. Also rode a 50 last night and man it was fun.

Give Wobbly a ring, get one of his 400cc twins, should get you to row 1 in f3

[richban]

Give Wobbly a ring, get one of his 400cc twins, should get you to row 1 in f3

Just going out to buy my lotto ticket.

[RMS eng]

Neds 23rwhp Engine

After three years without a problem, Chambers is giving it a Birthday



Nothing to special, a real simple setup, still using the std carb and roughly polished but other wise unmodified inlet tract, other tech details were posted on page 200.

how many KMs has it done on a piston

[bucketracer]

how many KMs has it done on a piston

The expensive Derbies and some FXR's might need run-time-meters but we don't use them so not to sure about the actual kms.



But Chambers tells me, that as best as he can tell, the piston has been in the engine since April 09 and the bike has done several 2-hours and most Mt Welly race meetings since then and it will be going back as is for another turn.

I think the only things being changed are a dodgy gear that occasionally poped out of engagement and the old main brgs, also the crank will be balanced.

Like the other ESE bikes, it's been reliable and inexpensive to run.

[RMS eng]

Expensive Derbies might need run-time-meters but we don't use them.



Chambers tells me, that as best as he can tell, the piston has been in the engine since April 09 and the bike has done several 2-hours and most Mt Welly race meetings since then and it will be going back as is for another turn.

I think the only things being changed are a dodgy gear that occasionally poped out of engagement and the old main brgs, also the crank will be balanced.

Like the other ESE bikes, it's been reliable and inexpensive to run.

marks Aprilia 50 did 800KM on a piston before it broke,revs to 14000 and a derbi 50 will do a year on a piston ,and the derbis are not that expensive to build,you don't need alot of dyno time to get the most from them,same for marks aprilia 50.also motor wear comes down to how hard you push the bike also.

[bucketracer]

There is only one Derbi and a handful of old RG50's running regularly in F5 now.

Av riding her Honda 100 fitted into a RG50 frame and RG150 front end beat Dave D and his Derbi/RS125 chassis combo the last time she rode in F5, so it can be done.

It would be a good class to get into, not so crowded as B and F4.

[TZ350]

Found this old post to go with those KX125 cylinder pictures I posted earlier.

The Relationship Between Port Shape and Engine Performance for Two-Stroke Engines
Document Number: 1999-01-3333 Date Published: September 1999
Author(s): Hisatoshi Kinoshita and Motoyama - Yamaha Motor Co., Ltd.

Abstract: Measurement using a three-dimensional anemometric tester was made for the gas flow inside the cylinder of a two-stroke engine while the shape of the transfer port was modified. The relationship between port shape and engine performance was investigated for various factors that characterize the flow in cylinder. In this paper, we focused mainly on two engine running conditions: the maximum output at 11,750 rpm and the output at 10,000 rpm. As a result, we found that the maximum output is most related to the tangential inclination angles of the main transfer port and the inner vent radius of the main transfer duct.

[TZ350]

Maybe team ESE could sponsor me on my RGV250. All you would have to do is make it go fast. I really like it but have no idea how to make it go good.

Start here:- http://www.rgv250.co.uk/forums/index...itech-results/

Redmer Bootsma has done a lot of work with his RGV and Ignitech ignitions. He is worth a Google.

Redmer has now moved back to Holand after living in Austraila, and when he was over here working on projects he visited the ESE workshop a few times. Later he sent us a small collection of the info on RGV's that he has posted on forum sites and was the inspirtaion behind us getting Ignitechs, when I can locate the data I will post it for you.

[wobbly]

That KTM cylinder I posted is off a road bike - so is as legal as it gets.
The fact it took 3 days of grinding and dynoing to make it fast,means in fact it would have been cheaper to buy an aftermarket bolt on.
I agree that spending money is needed to go fast,but how you spend that money is sometimes dependant upon the knowledge you have to make the right decisions in the first place.
That old KX cylinder sleeved down to 100cc would make a rocket with a heap of epoxy and grinding - its got all the beginnings of a good engine.
I have that sae paper on ports but the link is broken.

[kel]

Found this old post to go with those KX125 cylinder pictures I posted earlier.

Which illustrates one of several problems faced when trying to coax power out of the KE, there is no inner radius to the transfer ducts, just the the liner. The attached photo shows the minor porting thus far (only about 12hrs work in the cylinder) the plan for today is to add epoxy to the liner to form a 6mm inner radius to the main transfers duct.
What I have realised through this process is that the Suzuki is a better unit for modifying than my Kawasaki - wider and radiused transfer ducts, larger rotary disk, better head etc (Im making excuses in case I dont crack 20hp, that would be embarassing!) although the KE does have a strong 6 speed box.

This is the KE

Im aiming for something like this

[bucketracer]

Another link to useful RGV info http://www.rgv250.co.uk/forums/index...e-enhancement/

I joined the Forum and found Redmers Profile page and looked up his posts, he spends most of his time in the engine enhancement section, lots of useful stuff there.

Like how to setup the Ignitech for quick shifting and if you have ever wanted one, a link to a professional quality timing light http://www.iequus.com/Product/Detail...B-0C48F517AD25