ESE's works engine tuner

[andrew a]

Great to see that it ran for the day but my thoughts are if you take it to HD with no air box your looking for trouble. Good work Rob and the team.

[Leed]

.
.
auto... HONDA CR/RC...
"RC250MA motocross equipped with the "HFT", won the series championship in the second year of the All-Japan Motocross Championship racing in 1991. The ultra-high pressure, "HFT" maintained by the electronic control to obtain intelligence and high efficiency is the potential has been proven in combat that race yet."

"1991 was also the last year for Mugen in Motocross as they decided to focus on car racing instead. Honda had two automatics in the 250 class that year ... one was a full works bike and one was more 'production' based. The full works automatic bike won the series, while the 'production' based bike did win one round. The bike was awesome to see race and would shift based on the load felt by the motor ... the bike was always on the pipe.

Eric Geboers rode the works automatic during practice for the 1991 Tokyo Supercross, but decided not to race it. I was in the practice group with the rest of the Japanese 250 guys and got to watch Goboers take his laps (while standing next to the big triple). Geboers hit the triple and did a huge endo .. he was going right over the bars and it was ugly .. the bike was nearly vertically pointing straight down at the ground. Geboers pinned the throttle and the bike went braaapbraaapbraaap while automatically up-shifting through the gears. The gyro of the rapidly accelerating rear wheel literally pulled the back of the bike down and he landed it perfectly. I think that was his last lap on the bike, but it was simply unbelievable to see and I will never forget it. " quote RbR

I recall some experiments with it in the AMA circuit
and 20 years later the Zero shift system on the Honda RC212V



sparkplugs...
why do we have to pay over 100% markups on plugs in NZ?
and if I buy the OEM iridiums plugs for a car I could expect to pay NZ$160 for a 4 set (from a dealer)
so I fork out $20+ for iridiums on a bike, when I can import from the UK ($12) or Japan (for less than $10 each)

I can't comment on whether the ultimate power is obtained from the NGK variety but I think the Denso are silightly higher build quality, and in terms of presentation - the Denso electrode protectors in the packaging are plastic tubes rather than NGK's cardboard - 0.4mm dia electrodes are super fine

[F5 Dave]

.
.. . but I think the Denso are silightly higher build quality, and in terms of presentation - the Denso electrode protectors in the packaging are plastic tubes rather than NGK's cardboard - 0.4mm dia electrodes are super fine

um, trivial issue, the NGK used to use plastic but went to Cardboard. I think you will find if was for appearing more environmentally friendly. Even the Japanese.

[Frits Overmars]

.....and 20 years later the Zero shift system on the Honda RC212V

Honda has never used the Zeroshift system; the seamless shift system on the RC212V is fundamentally different: http://www.pit-lane.biz/t1720p71-mot...n-non-seamless

[twotempi]

If an Aprilia 125 GP bike has the frame number RSR 129410 what year does this relate to ?? Does the "94" in the code mean it is a 1994 model ??

thanks

[2T Institute]

Question do what does the float set up look like on a carb from a RSW. Is it a conventional hinged float set up? (Like a ballcock)
Or more like a floating post?(like Wob mentioned earlier he made for the BSL to counter the fuel surging with the rearwards mounted carbs) i can imagine all sorts of carburation issues on long left and right hand corner, so i am assuming it was a sliding post set up? Or are i worrying about stuff that doesn't actually occur?

Have a 39.5 Delorto VHSC and seen a few VHSD's at the GP and they looked conventional hinged floats. They do have shallow bowls though

[husaberg]

If an Aprilia 125 GP bike has the frame number RSR 129410 what year does this relate to ?? Does the "94" in the code mean it is a 1994 model ??

thanks

A while back Frits posted the tech manuals which i guess may answer your question.

Thanks, Mental; everything seems to be fine now. So here they are again:
http://www.kiwibiker.co.nz/manual/Aprilia-1.zip (6.8 MB)
http://www.kiwibiker.co.nz/manual/Aprilia-2.zip (8.3 MB)
http://www.kiwibiker.co.nz/manual/Aprilia-3.zip (9.2 MB)
http://www.kiwibiker.co.nz/manual/Aprilia-4.zip (7.2 MB)
http://www.kiwibiker.co.nz/manual/Aprilia-5.zip (5.6 MB)

Have a 39.5 Delorto VHSC and seen a few VHSD's at the GP and they looked conventional hinged floats. They do have shallow bowls though

thanks i often wonder about problems that probably exist only in my head i guess (must be getting old)

.auto... HONDA CR/RC...
"RC250MA motocross equipped with the "HFT", won the series championship in the second year of the All-Japan Motocross Championship racing in 1991. The ultra-high pressure, "HFT" maintained by the electronic control to obtain intelligence and high efficiency is the potential has been proven in combat that race yet.""1991 was also the last year for Mugen in Motocross as they decided to focus on car racing instead. Honda had two automatics in the 250 class that year ... one was a full works bike and one was more 'production' based. The full works automatic bike won the series, while the 'production' based bike did win one round. The bike was awesome to see race and would shift based on the load felt by the motor ... the bike was always on the pipe.

it says it is a CTV in the pic like the Monotrak and a lot of scooters and the DAF car (Frits will relate to that i guess)but Honda seem to have overcomplicated it in a way that i don't understand why.GEE Honda a belt and pulley would be neater less parts etc.(Whoops its actually a comparsion so bum slapfor me i better brush up on my Japanese.
http://en.wikipedia.org/wiki/Human_F...y_Transmission

Oh it is a Swash plate transmision (not that i know WTF that is)Hindsight i guess the moving rods control the oil flow?

[ Characteristics of the HFT http://http://thekneeslider.com/archives/2007/10/04/honda-dn-01-human-friendly-transmission-hft/]
A transmission system with a wide range of functions in a single unit, the HFT is a compact and highly efficient infinitely variable transmission system encompassing functions for starting, power transmission and shifting, all on a single shaft. The basic configuration of the system consists of an oil pump for converting engine power into hydraulic pressure, and an oil motor for converting the hydraulic pressure back into power for output. Both are made up of multiple pistons, a distributor valve and a swash plate for piston operation, while the cylinders are integrated into the output shaft, forming the characteristic structure of the HFT.The HFT also features the world’s first* lockup mechanism for an infinitely variable hydraulic mechanical transmission. When cruising, this lockup mechanism works to minimize transmission efficiency losses, contributing to improved fuel economy.

- Soichiro Honda becomes interested in hydrostatic drives in the early 1950s.
- Honda licenses use of a patent for a machine-tool hydrostatic drive.
- Honda debuts the Juno in 1962, a Japanese-market scooter with hydraulic drive. A mechanically actuated system shifted gears via the left hand grip.
- The Honda RC250 factory motocross bike with an automatic transmission undergoes testing in the late 1980s.
- The Honda RC250MA motocrosser competed with the HFT in the 1990 all-Japan MX championship.
- The Honda Fourtrax Foreman Rubicon debuts in 2001 with a new-and-improved HFT.
- The 2008 DN-01 and its HFT are introduced in Europe

The huge advantage i can see is that you can use engine braking.
Human Friendly Transmission used on the Fourtrax rubicon and the DN01 or what ever its called.

.
Eric Geboers rode the works automatic during practice for the 1991 Tokyo Supercross, but decided not to race it. I was in the practice group with the rest of the Japanese 250 guys and got to watch Goboers take his laps (while standing next to the big triple). Geboers hit the triple and did a huge endo .. he was going right over the bars and it was ugly .. the bike was nearly vertically pointing straight down at the ground. Geboers pinned the throttle and the bike went braaapbraaapbraaap while automatically up-shifting through the gears. The gyro of the rapidly accelerating rear wheel literally pulled the back of the bike down and he landed it perfectly. I think that was his last lap on the bike, but it was simply unbelievable to see and I will never forget it. " quote RbR

The latest husaberg 4 smoke with the back to front upside down engine reportedly does interesting thing in the air (not sure of the engine rotation direction)

.sparkplugs...
why do we have to pay over 100% markups on plugs in NZ?
and if I buy the OEM iridiums plugs for a car I could expect to pay NZ$160 for a 4 set (from a dealer)
so I fork out $20+ for iridiums on a bike, when I can import from the UK ($12) or Japan (for less than $10 each)

Scale of our market unfortunately. they sell a lot more overseas.I tried to get hold of a shorty iridium for the CR500/250 Darbis allegedly told the big short there was no such thing. (could have been BS from the dealer though)

[dinamik2t]

Here's an exploded view of the VHSG : http://www.dellorto.co.uk/images/parts/VHSDDIAG.PDF

its float




And here's the VHTC :

[Frits Overmars]

Question do what does the float set up look like on a carb from a RSW. Is it a conventional hinged float set up? (Like a ballcock) Or more like a floating post?

Both the RSW and RSA carbs have pole-dancing float bodies.

[husaberg]

Here's an exploded view of the VHSG : http://www.dellorto.co.uk/images/parts/VHSDDIAG.PDF

its float

And here's the VHTC :
.

Both the RSW and RSA carbs have pole-dancing float bodies.

Thanks Frits and Dinamik.... So was my imagined lean out and over-enrichen from the bike leaning over a real issue. Or is it just a coincidence that they have pole floats?( i just finished looking at the pic Dinamik posted and was going to scold Lozza for missing it. but in hindsight in total fairness i guess was question was loosely framed

[twotempi]

A while back Frits posted the tech manuals which i guess may answer your question.

Have had a previous good look through this info but it only goes back to 2010 unless I missed it ( which is quite possible).

I think that the bike is a 1994 - 1996 ish model so would like to know what it is for elligibity reasons.

[husaberg]

A while back Frits posted the tech manuals which i guess may answer your question.

Have had a previous good look through this info but it only goes back to 2010 unless I missed it ( which is quite possible).

I think that the bike is a 1994 - 1996 ish model so would like to know what it is for elligibity reasons.

Is it the one that was for sale a while back...Yellow and expensive.........

[Ocean1]

Oh it is a Swash plate transmision (not that i know WTF that is)Hindsight i guess the moving rods control the oil flow?

That's not a good graphic. It's a very well establiched hydraulic mechanism, variable stroke axial piston beastie.... here:



Very cute, not as efficient as conventional gears or chains but if the gains in maintaining a constant optimal ratio with no shifts adds up it makes sense.

Edit: that's a pressure compensated one, will ramp up displacement until it reaches a preset pressure then ramp down to zero. An auto transmission version can ramp up until a target torque is reached then maintain displacement.

[husaberg]

That's not a good graphic. It's a very well establiched hydraulic mechanism, variable stroke axial piston beastie.... here:

Very cute, not as efficient as conventional gears or chains but if the gains in maintaining a constant optimal ratio with no shifts adds up it makes sense.

Edit: that's a pressure compensated one, will ramp up displacement until it reaches a preset pressure then ramp down to zero. An auto transmission version can ramp up until a target torque is reached then maintain displacement.

So the faster it goes the more oil it pumps up to a certain level then maintains it. So couldn't a simple plunger pump (like a renown) and a regulator bypass accomplish the same without the additional fuss. (Probably missed the point i guess)
I have to say i still like the double expanding pulleys or the husky main centrifugal then four separate centrifugal dog clutches better other than the overun and non lock up of course.
Oh Frits you never mentioned the lever that you trip to start the Husky beasty to isolate the clutch i guess ...

[Ocean1]

So the faster it goes the more oil it pumps up to a certain level then maintains it.

No, the displacement is controlled by the swash plate, not (only) shaft rev's. When the plate is perpendicular to the main shaft displacement is zero, as the plate angle increases the pistons begin to stroke more.

In that video the plate angle is controlled by oil pressure acting against a spring, more pressure = less displacement, it hunts for a set pressure.

A variable transmission version can have the plate controlled by several variables; rpm, torque, throttle position, road speed etc etc. It will displace from zero to it's maximum capacity depending on those inputs. Perfect ratio for each set of variables, continuously. Energy efficiency maybe 85% against multiple gears at about 95%.