ESE's works engine tuner

[Wizzer10]

The superkart gas gas engine was done by Manfred Wittenborn wiwa a gas gas racing Germany cylinder is 2 exhaust port . AKA rs125

[Peter1962]

The superkart gas gas engine was done by Manfred Wittenborn wiwa a gas gas racing Germany cylinder is 2 exhaust port . AKA rs125

The cases of the gasgas 250 came with a balancer till 1999. The enduro was equiped with a balancer, the MX was not. Those cases were the basis of the 300 that was used in the quad.
For unknown reasons, from 1999 they abandoned the balander, made new cases where a retrofit of the balancer was no longer possible.
When i was enquiring about the possibility of buying the old cases, the belgian importer of gasgas told me that the company no longer has any in stock. I was not very convinced by his explication so i contacted the french importer. He told me that gasgas made an exclusive deal with manfred wittenborn (www.wiwa-racing.de) that only he gets those cases so he can produce and sell the famous wiwa kart engine with balancer. It's a business deal... Is that a bad thing ? No, of course not. But 1 little detail one should take into account : the price for his 250 engine without carburator and without a pipe is 4.700 euro. The engine has another unique feature : it is the only mx based 250 engine that is truely square : 68 x 68

[F5 Dave]

Unknown reasons, well I'll guess. I've owned 200 & 300 & ridden a couple of 250s and latest 300s. Certainly never noticed enough vibration to register whilst dirt riding. And I hate vibration. More weight, expense and parts to go wrong.

Of course dirt riding is very different.

[peewee]

on the new ktm engine i 'think' the links frits posted said the crank and possibly the flywheel is lighter so the counterbalancer doesnt increase the overall engine weight. i havent seen if the balancer shaft rides directly on needle bearings or common ballbearings

[Martin1981]

Wobbly, my KX 500 Rebuild is almost finished and I am thinking about fitting VForce 2 Reeds. As i read what you said about Size and Flow Velocity, do you think it is better to fit a Reedcage made for a 250 or even 125 to make more Power? Or is it best to use the Cage made for the 500? Thanks

[husaberg]

frits dont you think a dirtbike would be better off with zeroshift type of transmission? maybe faster laps and less gear wear

Sure, and better still with a CVT. And not just dirtbikes but any vehicle.

Peewee did you know that the seamless transmission used in Motogp cost over 500,000 Euros (each) and the primary shaft alone, has over 200 parts.
That's likely more parts than some entire two stroke engines have.
With the Hondas there is only one mechanic outside the factory that is even allowed to touch it.

[wobbly]

Martin ,I cant give you any guidance on the reed suitability unless I can put all the data into EngMod along with the engine
power capability to be able to do a valid comparison.
The stock cage may be fine for flow, depends upon the power.
But in general a VeeForce will make better power simply due to having way less tip lift for an equal curtain area.

[Martin1981]

Thanks Wob!

[peewee]

Peewee did you know that the seamless transmission used in Motogp cost over 500,000 Euros (each) and the primary shaft alone, has over 200 parts.
That's likely more parts than some entire two stroke engines have.
With the Hondas there is only one mechanic outside the factory that is even allowed to touch it.

I didn't know the cost but at 500,000 I wonder how much the automotive version would be

[peewee]

Martin ,I cant give you any guidance on the reed suitability unless I can put all the data into EngMod along with the engine
power capability to be able to do a valid comparison.
The stock cage may be fine for flow, depends upon the power.
But in general a VeeForce will make better power simply due to having way less tip lift for an equal curtain area.

mine must update automaticly somehow. now you can select teacup passages and bullnose at the sleeve/ inner wall. didn't notice this last time I used it

[husaberg]

I didn't know the cost but at 500,000 I wonder how much the automotive version would be

Hopefully a bit less.........
I don't know once it gets to full production a lot less, but its a very complicated bit of kit compared to a CVT even a computer controlled one like a lot of cars have now (ie Mitsubish)

[wax]

Where do you buy the best possible big end bearings, the engine I'm using is known for being hard on bearings I want to make sure I have the best I can get.

[dark art]

I usually use Samarin but INA/FAG seem to be very good as well. IKO has a online catalog but don´t know where to buy

[wobbly]

The manufacturers are all very good, you just need a modern " flat " cage and be sure that you have a set of selected rollers
that are less than a micron different in diameter.

[peewee]

heres a list of the prox lower rod bearings with part# which are made by ntn and probly a few other manufacturers.

16 x 22 x 13 13 pcs Copper / M-Cage 22.162213
18 x 24 x 14 13 pcs Silver / M-Cage 22.182414
18 x 24 x 15 15 pcs Silver / Flat Cage 22.182415F
20 x 26 x 14 16 pcs Silver / Flat Cage 22.202614F
20 x 26 x 15 14 pcs Silver / M-Cage 22.202615
20 x 26 x 15 16 pcs Silver / Flat Cage 22.202615F
20 x 27 x 14 12 pcs Silver / M-Cage 22.202714
20 x 27 x 14 14 pcs Silver / Flat Cage 22.202714F
22 x 28 x 16 14 pcs Silver / M-Cage 22.222816
22 x 28 x 16 18 pcs Silver / Flat Cage 22.222816F
22 x 29 x 14 16 pcs Silver / Flat Cage 22.222914F
22 x 29 x 16 14 pcs Silver / M-Cage 22.222916
22 x 29 x 16 15 pcs Silver / Flat Cage 22.222916F
22 x 29 x 17 14 pcs Silver / M-Cage 22.222917
22 x 29 x 17 16 pcs Silver / Flat Cage 22.222917F
24 x 30 x 17 17 pcs Silver / M-Cage 22.243017
24 x 30 x 17 19 pcs Silver / Flat Cage 22.243017F
24 x 30 x 20 19 pcs Silver / Flat Cage 22.243020F
24 x 31 x 16 - Silver / Flat Cage 22.243116F
24 x 31 x 17 15 pcs Silver / M-Cage 22.243117
24 x 31 x 17 16 pcs Silver / Flat Cage 22.243117F
24 x 32 x 20 12 pcs Silver / M-Cage 22.243220
24 x 32 x 20 16 pcs Silver / Flat Cage 22.243220F
25 x 31 x 20 15 pcs Silver / M-Cage 22.253120
25 x 32 x 16 17 pcs Silver / M-Cage 22.253216
25 x 32 x 16 17 pcs Silver / Flat Cage 22.253216F
25 x 32 x 16.5 17 pcs Silver / Flat Cage 22.253216.5F
25 x 32 x 20 16 pcs Silver / M-Cage 22.253220
26 x 33 x 18 16 pcs Silver / M-Cage 22.263318
26 x 34 x 20 14 pcs Silver / M-Cage 22.263420
26 x 35 x 20 14 pcs Silver / Flat Cage 22.263520F
27 x 34 x 21 16 pcs Silver / M-Cage 22.273421
28 x 35 x 18 17 pcs Silver / M-Cage 22.283518
28 x 36 x 20 15 pcs Silver / M-Cage 22.283620
30 x 38 x 16 17 pcs Silver / M-Cage 22.303816
30 x 38 x 18 17 pcs Copper / M-Cage 22.303818C
30 x 38 x 18 19 pcs Silver / Flat 22.303818F
30 x 38 x 18 19 pcs Silver / Flat 22.303818F-1
30 x 38 x 18 17 pcs Silver / M-Cage 22.303818S
30 x 38 x 19 20 pcs Silver / Flat 22.303819F
32 x 40 x 18 20 pcs Silver / Flat 22.324018F
32 x 40 x 20 18 pcs Silver / M-Cage 22.324020
32 x 40 x 20 20 pcs Silver / Flat Cage 22.324020F
33 x 41 x 20 20 pcs Silver / Flat Cage 22.334120F
34 x 42 x 20 21 pcs Silver / Flat Cage 22.344220F
34 x 42 x 21 21 pcs Silver / Flat Cage 22.344221F
34 x 43 x 20 16 pcs Silver / M-Cage 22.344320
35 x 42 x 20 21 pcs Silver / Flat Cage 22.354220F
35 x 43 x 22 19 pcs Silver / Flat-Cage 22.354322F
36 x 45 x 23 20 pcs Silver / Flat-Cage 22.364523F
37 x 45 x 22 22 pcs Copper / Flat-Cage 22.374522F
38 x 50 x 23 17 pcs Silver / Flat Cage 22.385023F
40 x 50 x 23 19 pcs Silver / Flat Cage 22.405023F