The HP2 Sport has landed

[rubin]

I’ve also disconnected the exhaust power valve. The engine feels much more lively now right through the rev range, and I’m now having trouble keeping the front wheel down when accelerating in 1st gear.

[/QUOTE]

hi yonkyo is that the exhaust valve directly under seat ? do you just disconnect the cable ? what is it there for if it runs better without, is it a emission jobby.
i have had the same probs with the smell of oil . when i picked my gsa up it was really strong so i had a chat with a mechanic he said the smell is down to the motor burning a little oil because its new and it will stop, which it did,
i also have the same smell on the hp2 so i am hoping it stops shortly.

 

[Yonkyo]

hi yonkyo is that the exhaust valve directly under seat ? do you just disconnect the cable ? what is it there for if it runs better without, is it a emission jobby.

Hi rubin
The exhaust valve on the HP2S must be there purely for ‘emissions’ control.
It strangles the engine. Disconnect it. Ride the bike some distance so the ECU can adjust the fuelling accordingly. Bingo. No flat spots more grunt right from tickover, more midrange and higher top speed. 155mph with.…..170mph without.

I simply disconnected the cable from the valve wheel where it connects at the exhaust end can. I can then easily reconnect it when the bike goes in for the 6k service (in case of warranty issues perhaps)

 

[snakepilot]

Exhaust Valve

Yonkyo,

So you just disconnected the cable from the valve body and left it attached to the exhaust? I was told by the dealer that doing so would close the valve which is spring loaded shut.
Was that information wrong, or am I missing something.
Also, did it increase the exhaust volume?

TIA,

John

 

[pistonbrokescooby]

oil?

hi all
the oil smell makes sense then , the motor running in and polishing the bores,funny do smell it as soon as you stop after a couple of mile run . never got no oil smells with the gs.... .just used a lot ... exhaust valve disconnection , when you turn ignition on ,the valve under the seat moves round to prime ,you can see this with the seat off . what happens to the cable at the back is it left hanging ?? when you disconnect ..
pb

 

[zzrman]

Interesting about the exhaust valve. My question would be whether this makes the throttle response snatchy at low revs. One of the things I really like about the bike is the smoothness of the low speed throttle response. So if you going round a slow speed tight bend such as a hairpin in first gear its easy to control the speed through the corner and on exit. On my K1200S that is a bit of a nightmare.

But another issue. Has anyone had a problem with the dash lay out? Here's my problem: the rectangular "box" in the lower right hand corner which gives you the mode setting, trip meter, time and the gear selector indicator - and range when you get down to reserve - sometimes comes on at start up and sometimes doesn't. I always get the engine warning lights, rev counter and speed and the warning lights in the vertical section on the far right hand side. For example on Sunday started the bike up - no "box". Rode 20 miles and stopped. restarted and the "box" displayed. Stopped again and on restart it wouldn't display. Stopped again for fuel and it displayed. When it went in for its first service a week ago the computer diagnostics didn't show any fault stored and the dealer was able to see the problem for himself. They are checking it out with BMW.

It's probably just a faulty display and will need to be replaced under warranty.

 

[pistonbrokescooby]

dash

hi zzrman
my dash has been ok so far ,temping fate now eh ,have not had much time to check all its functions yet ,start up yes and near a few speed camera Jobie's .lot of twisties near to were i live and looking at that display is the last thing on my mind .think the dash functions need a week of playing around with ..bit complex for my simple mind .i have worked out all the road stuff..here is a bonus that i am happy with , it has not misted up yet .... the aprilia done that the second day i had it and it was only left in the garage overnight ,the answer at the dealers was ,OH THEY ALL DO THAT . the ducati done it too, bonus on that one . it took a month and the answer was the same . how dismal is that after paying mega money . can't wait till this thing is run in .nice here today .
pb

 

[pistonbrokescooby]

tyre woes

hi all
whhhhaaaaaaaaaaaaaaaaaaaa just found a small nail in the tyre. that's f--- the day up .go and decide not to pull out or not .

 

[Yonkyo]

exhaust valve disconnection , when you turn ignition on ,the valve under the seat moves round to prime ,you can see this with the seat off . what happens to the cable at the back is it left hanging ?? when you disconnect ..
pb

scooby
just disconnect the cable end nipple from the valve wheel. The cable outer stays in place. Take the cover off and have a look. It’s a two minute job.

Interesting about the exhaust valve. My question would be whether this makes the throttle response snatchy at low revs. One of the things I really like about the bike is the smoothness of the low speed throttle response. So if you going round a slow speed tight bend such as a hairpin in first gear its easy to control the speed through the corner and on exit. On my K1200S that is a bit of a nightmare.

zzrman
the throttle response is still smooth as silk. Just give it a try. Its easy to reconnect if you don’t like it.

My bike runs better than ever now at 5000 miles.

BTW i've had no issues with my dash display so far.

 

[Yonkyo]

hi all
whhhhaaaaaaaaaaaaaaaaaaaa just found a small nail in the tyre. that's f--- the day up .go and decide not to pull out or not .

Thats shit luck mate.

is it the front or the rear. if its the rear and only a small nail, i'd pump some Ultraseal in there, then pull the nail out and keep riding till the tyre is fully worn out.

 

[pistonbrokescooby]

tyre woes

hi yonkyo
that cable ,do i disconnect at the seat or tail end please . i will disconnect and give it a try soon as its run in .225 miles now ,
sat in the garage at tea time tonight with the pliers do pull the nail out ,do i leave it in ,do i push it in farther as the tyre won't be on long .emm five minutes i decided to pull it out , got a good grip on it and pulled it out ,it was the head and a stump around 5ml long ,phew ,did check their is no more nail left in ,dribbled on the hole and no bubbles ,phew .got away with it ,just had a look a minute ago and checked pressure ,normal . thank f--- for that , must of been borderline to a puncture .
pb

 

[zzrman]

hi yonkyo
that cable ,do i disconnect at the seat or tail end please . i will disconnect and give it a try soon as its run in .225 miles now ,
sat in the garage at tea time tonight with the pliers do pull the nail out ,do i leave it in ,do i push it in farther as the tyre won't be on long .emm five minutes i decided to pull it out , got a good grip on it and pulled it out ,it was the head and a stump around 5ml long ,phew ,did check their is no more nail left in ,dribbled on the hole and no bubbles ,phew .got away with it ,just had a look a minute ago and checked pressure ,normal . thank f--- for that , must of been borderline to a puncture .
pb

Do be careful. The fact that the tyre isn't punctured doesn't necessarily mean that it is safe. Your life is worth a lot more than the cost of a new tyre.

 

[pistonbrokescooby]

not that tyre again

hi zzrman
did cross my mind that it might be a mill away from a puncture and that wheel going round at 70 mph ,there will be a lot pf pressure on that tiny bit ,checked the pressure when i got up this morning and its the same as last night , so in a dilemma again . i have a plug repair set out of a old gs adv .do i push the thing in and repair or just ride the bike .... few years back bought a aprilia rsv and after a week found the tyre had been plugged and the owner did not tell me ...em,not a happy bunny . trouble is after a few weeks of giving the bike grieve the plug started to leak .so that's why they recommend its only a temporary measure ,so had to buy a new tyre anyway.the tyre was almost new on the bike as well . so in a ideal world i should really take no chances and go and buy a new tyre eh. as its running in and its not getting thrashed i am not sure what to do ??????????.although the bike does go like a good en up to 5000 revs while running in .
thanks piston b s

 

[pistonbrokescooby]

blast

hi all
done a late one in the dark last night ,air was damp and the bike going off like a good en . they go really well even when running in 5000 was the max revs ,emmm .not much longer now till run in .bike is coated in flies this morning ,boy do they stink like rotting fish , oh well out comes the hose pipe . tyres been to the edge now and they handle really well ,well impressed .pb

 

[rubin]

hi guys
i think i am going to have a dable this weekend and disconnect the exhaust valve and see how it goes.
tell you what i have found mine runs very lumpy on tickover and sometimes cuts out when i pull up . the tickover is set at 1200. i am hoping it loosens up and they set the injection up on the first service. hopefully should cure it

 

[Chispitas]

hi guys
i think i am going to have a dable this weekend and disconnect the exhaust valve and see how it goes.
tell you what i have found mine runs very lumpy on tickover and sometimes cuts out when i pull up . the tickover is set at 1200. i am hoping it loosens up and they set the injection up on the first service. hopefully should cure it

Hi Rubin et all
So good to read this tread & to know you are all enjoying the new toys
With ref: your cutting out - lumpy tickover, check that your vacuum pickup points on the injectors have both rubber covers intact! mine had a tear in the centre and gave the same symptons (right side) where I guess my knee had caught it.
Exaust escape valve: I have tried to get some info on this and can´t So yesterday I took the seat off and turned on the ignition - no movement. I ran the engine at low rpm (cold) no movement; so I went for a short ride with the seat off and apart from nearly falling off trying to look at the mechanism, mine doesn´t appear to move! At home I ran it to full throttle - no movement!
So I guess it only moves under load or mine is seized or has never worked. Any help would be appreciated.................

 

[pistonbrokescooby]

exhaust valve

hi chispitas
when the ignition is turned on ,you can here a click and movement under the seat , cable moving round on wheel priming it . if it does not work maybe its been disconnected at dealers already ,maybe you have full power then ,might be worth speaking to the dealers and see what they say about it .
pb

 

[Chispitas]

hi chispitas
when the ignition is turned on ,you can here a click and movement under the seat , cable moving round on wheel priming it . if it does not work maybe its been disconnected at dealers already ,maybe you have full power then ,might be worth speaking to the dealers and see what they say about it .
pb

Many thanks, I phoned Bahnstormers Alton yesterday but they didn't know. My cable is connected - just no movement, BUT I make 166 mph flat out - so maybe it's jammed in the open position. I will try and do some more digging as to how it's operated. I suppose I could take the box apart on the exhaust itself but I ain't the best grease monkey in the world & I can see springs & god knows what else flying about the garage floor!
By the way when you look at the wheel when you turn on the ignition in which direction does the wheel move?? And if you can experiment for me - which way does it turn and at what revs when your motor is running?
Rgds Tony

 

[rubin]

Hi Rubin et all
So good to read this tread & to know you are all enjoying the new toys
With ref: your cutting out - lumpy tickover, check that your vacuum pickup points on the injectors have both rubber covers intact! mine had a tear in the centre and gave the same symptons (right side) where I guess my knee had caught it.
Exaust escape valve: I have tried to get some info on this and can´t So yesterday I took the seat off and turned on the ignition - no movement. I ran the engine at low rpm (cold) no movement; so I went for a short ride with the seat off and apart from nearly falling off trying to look at the mechanism, mine doesn´t appear to move! At home I ran it to full throttle - no movement!
So I guess it only moves under load or mine is seized or has never worked. Any help would be appreciated.................

hi chispitas nice to hear from you and thanks for the advice i will check it out tomo to see if there is anything happened to the covers you mentioned

 

[pistonbrokescooby]

valve

hi chispitas
just seen your mail .i will take the seat off over the weekend ,sun ,and see which way the exhaust valve goes when you rev it up and turn ignition on ,i would imagine it would be clockwise ????? .not long now before its run in now and the first service . . that's it then spend the rest on the bikes life running out
pb

 

[Chispitas]

hi chispitas
when the ignition is turned on ,you can here a click and movement under the seat , cable moving round on wheel priming it . if it does not work maybe its been disconnected at dealers already ,maybe you have full power then ,might be worth speaking to the dealers and see what they say about it .
pb

Hi PBS
I have just been out Sat & Sun Mornings with the cable disconnected. To be honest I can't notice any difference so as you sumise it may have never worked - BUT when it's hot sometimes the wheel moves a fraction - not always. However it does not seem to return to it's starting position. I'll keep looking & playing. In the mean time it can stay disconected because the bike goes like a bullet!
I just find it odd that the cable when pulled, shuts the valve and when slack opens it You would expect the reverse. Anyway I can find no reference nor can Bahnstormers as to how the valve works or comes apart or for that matter on the servo motor that operates it. I'll keep digging - there must be a refence somewhere in case it needs replacing!

(This is copied from a write up of the bike when first launched) -An exhaust flap in front of the double exhaust pipe silencer at the rear and actuated by an electronically controlled servomotor via cable produces a fuller torque curve.