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2000 f4 throttle

4K views 35 replies 15 participants last post by  gunnar 
#1 ·
Now I understand it's just the nature of the beast but is there anyway to keep the throttle from being so twitchy? I would love to have a just a tiny bit of play
 
#2 ·
gunnar,

I think you need a PCIII, to get a nicer throttle response, and a bit of qulity dyno time, worked for my 2001 F4 750.

jimboF4
 
#6 ·
I recently got all the recommended twitchy throttle fixes done: PCIII, dynotuning to smooth out fueling, new plugs, TPS adjusted, left throttle spring removed. And there has been a definite improvement in throttle feel... it improved from terrifying to merely frightening. It is still pretty nervy rolling onto the throttle mid-corner in the lower gears. The upshot is that the throttle gets easier to modulate with practice, but the first few rides of the season can be pretty nerve racking.
 
#7 ·
I found my 750 the same when i got it so, as CAG says, take off a throttle return spring, I then fitted a pc111 & had it set up on the dyno-

Then finally, fitted a Ducati 998 throttle and ducati grips, this turns the long reach Mv unit into a quick action throttle- it also dispenses with the unnecessary Mv 2 throttle cables in favour of just 1 so it's far neater

Results are great, no more snatchy go go juice and 6bhp more :)
 
#10 ·
oh i'm bad for not reading
as twat face merito says no q a just put a 1000 one on
i mean why o why would you buy an mv then fit ducati throttles to it lol
next thing youll know you want it to sound like a duke
 
#12 ·
It's a 2000 f4 750, don't think Chris has one for them.

I actually ended up hooking the right throttle spring back up, I kinda liked it. Plus, you shouldn't be rolling on the throttle from nothing mid corner anyway :stickpoke

I found you kinda pick up the fine muscle control over riding it more, works for me anyway :f4: :thewife:
 
#13 ·
#16 ·
Now I understand it's just the nature of the beast but is there anyway to keep the throttle from being so twitchy? I would love to have a just a tiny bit of play
The original F4 750 had a horrible advance map - never seen anything like it !

For example, 3 degrees throttle:
1800rpm, 20 degrees advance
2700rpm, 60 degrees advance
3300rpm, 35 degrees advance
4000rpm, 60 degrees advance

It's like that all the way through the map !

That's what you need to get sorted.

Cheers
Adam
 
#17 ·
@ Adam, jeeeeeesh that's shocking !!

My 750s is an 02 so I'd guess maybe smoother than that but even so it was horrifically snatchy, the pc111 sorted it and a good hours dyno time, worth every penny though...

Iv now got a rare corse chip to put in the ecu and yup... Yet more dyno time :wtf:
 
#18 · (Edited)
Its been said a thousand times already, MV Corse Chip + PC3 is nearly the same price as a Microtech ECU, only Microtech ECU has litteraly maximum 100% customizable everything. Plus you don't have to carry a black PC3 box around and a load of extra wires to your injectors and TPS.

Either live with stock, or go replacement ECU, PC3 is good for extra power, but you are asking to solve your throttle problems, and the Microtech is the solution to those problems, not a PC.
 
#29 ·
+10

Its been said a thousand times already, MV Corse Chip + PC3 is nearly the same price as a Microtech ECU, only Microtech ECU has litteraly maximum 100% customizable everything. Plus you don't have to carry a black PC3 box around and a load of extra wires to your injectors and TPS.

Either live with stock, or go replacement ECU, PC3 is good for extra power, but you are asking to solve your throttle problems, and the Microtech is the solution to those problems, not a PC.

Yup:)
 
#19 · (Edited)
Same Issue with Senna 1000

Does the suggested fixes also work for the 1000 Senna?
My throttle is doing the same thing, but Trooper Lu's guys think the bush in the throttle body linkage has gone off and needs to be replaced. The bike also has a PCIII, but is running rich on # 4 cylinder.

I have had it on the dyno 3 times and its has come back in different states of tune each time - from crap to workable.

Any suggestions on a good dyno person in Sydney? TL use some guy in Chipping Norton for their work but he is A$330.00 for as long as it takes to get it right.
 
#20 · (Edited)
Does the suggested fixes also work for the 1000 Senna?
My throttle is doing the same thing, but Trooper Lu's guys think the bush in the throttle body linkage has gone off and needs to be replaced. The bike also has a PCIII, but is running rich on # 4 cylinder.

I have had it on the dyno 3 times and its has come back in different states of tune each time - from crap to workable.

Any suggestions on a good dyno person in Sydney? TL use some guy in Chipping Norton for their work but he is A$330.00 for as long as it takes to get it right.
Microtech works. Xbikes will send it with a map for your senna, or you can take it to a place in Port stephens who will custom map the mirotech and sort any inevitable little probs that need a tweak (idle speed, TPS, and unforseen probs). Honestly, I had the PC and the Microtech. While I'm in no way bashing the PC, I have to say for sorting out throttle response, the Microtech is a one-stop shop. And it'll sort out your rich cylinder too without even breaking a sweat. And I didn't just fit a PC, I specifically had the MV specialist play around with the TPS and throttle cable and fit the PC all with the same goal of changing throttle response. Failed for me.

Its' worth posting a thread in the Xbikes site sponsor section to get the name of that approved garage at Port Stephens.
 
#21 · (Edited)
squibby; PC3 is good for extra power said:
The 16m can be programmed how ever you want just like the Microtec but this would be bespoke and for the most of you, fixed.
With the Microtec and the communication lead you can change the settings every day if thats what you need.

If you have the later ecu then as Squib says the Programmable Microtec is the only answer - otherwise you have a choice
 
#26 ·
Well I did a PC and am getting the bike on the Dyno next Tuesday. Hopefully all this will be sorted out.
 
#27 ·
Microtech

Thanks Squibby,

I did start a conversation with Microtech many months ago but it fell over as I didn't get replies from them on my questions.

I think I will try to give the throttle fixes and PCIII one last try and if it still doesn't work I may just leave it as it is. I am seriously considering selling the bike later this year, so getting it sorted by way of further investment is only an option if I decide to keep it.
 
#28 ·
Thanks Squibby,

I did start a conversation with Microtech many months ago but it fell over as I didn't get replies from them on my questions.

I think I will try to give the throttle fixes and PCIII one last try and if it still doesn't work I may just leave it as it is. I am seriously considering selling the bike later this year, so getting it sorted by way of further investment is only an option if I decide to keep it.
PC can not do what you can do with a Microtec, as easy as that.
 
#31 ·
If your not going the microtec route, I can sort out a better fuel and ignition map.
You probably won't need the PC either.
PM me if it's still rubbish

Cheers
Adam
Good work man. It took a long time for someone to come and help the "old ecu" guys.
 
#32 ·
Adam,

Whats the score with the Ignition map in relation to fuelling? I am getting the bike Dynoed with Xbikes (I know about the Microtec, but unfortunately dont have a grand to throw at her at the moment ) at the beginning of June, with a view to ensuring its mapped correctly for an MWR filter and the silmoto's, and also to help resolve the throttle issues at the bottom end.

I assume that if I had the map done, then the ignition maps were changed, that it would screw the fuelling up? Are they as finicky between bikes as the fuel maps are, or is it the case that a standard ignition map can be used across multiple bikes?


Thanks
Dale
 
#33 ·
Adam,

Whats the score with the Ignition map in relation to fuelling?

I assume that if I had the map done, then the ignition maps were changed, that it would screw the fuelling up? Are they as finicky between bikes as the fuel maps are, or is it the case that a standard ignition map can be used across multiple bikes?


Thanks
Dale
It would be better to get the bike dynoed after the ignition has been sorted if you want it perfect.....

A good base ignition map + bespoke fueling is was you need.
I've been looking at your maps, what issues are you trying to resolve ? throttle position / rpms ?

Cheers
Adam
 
#36 ·
Well it went on the Dyno. It now feels like whole new bike. The throttle doesn't feel like a light switch anymore.
 
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