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Discussion Starter #21
no I don't think its throttle input movements causing this as below 4/5k revs its flawless and silky smooth, at 6k revs and above it happens all the time, i still go over bumps etc and am doing up to 60mph under 4k so it should still have the same bumps and throttle movements occurring at lower rpms.


its hard to describe but its noticeable enough to be annoying - keeps me cruising at sub 85mph so probably better for my license though haha
 

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i know what you are saying.I hated the drivability of the stock bike. Only till don said to turn on the Ebc did it start to cruise smooth and not backfire and pop out of control.If I race somebody I will turn it back off.
 

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Discussion Starter #23
Is there a need to disable EBC if you race someone ? I can hardly tell any difference with it on or off tbh... will give it another run out this week and see if it changes the cruising issue for me.
 

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With the stock programming, I preferred engine braking set to "light" (although I agree that it didn't make a large difference), but the reflash (FTecu in my case) which disabled deceleration fuel cut made me put it back to "normal" because "light" without deceleration fuel cut led to the revs hanging high, with basically no engine braking at all. Disabling decel fuel cut itself helped with the driveability. But this isn't what the original poster is discussing. Cruise at higher revs isn't in the speed and load combinations that involve either decel fuel cut or engine braking control.
 

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Can all you guys post your mod set ups and how you have your settings set for what YOU think is the SMOOTHEST on YOUR H2.
mine
2015 H2
Brocks full stainless meg
Brocks Ohio map
Guhl flash with additional mod to slow down the tps
ebs set to LIGHT
+1front -2 rear
89 shell fuel most of the time
aftermarket air filter
 

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2015 H2
Hindle slip-on
FTECU: decel fuel cut disabled, who knows what other mapping changes were done that are relevant
EBC on normal - has rev hang when set on light
stock gearing
PetroCanada 94 fuel
stock air filter
 

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Just wanna say a couple things...

It's totally normal for a supercharger to behave this way. 6000rpm is right after the h2's engine starts to build boost and if you're in neutral throttle with any slight adjustments, it will be amplified due to the supercharger's confusion to either build boost or vent. That's why you constantly hear the chirp at the 6k rpm range.

Less rpms means very little boost or none making the throttle response very smooth and comfortable. On the other hand, riding harder at around 8000 rpms can also be smooth due to the rider's confidence and throttle control. This bike generally wants to be ridden hard and if you let the bike ride you, you will ultimately feel the twitches of the bike's malcontent.

As for fixes, everything that was mentioned previous would have an effect on throttle response (some more than others) but I feel the biggest and easiest way to have an effect would be to just get comfortable on the bike and don't let the bike ride you. I too thought the bike was extremely twitchy but once I was able to tame the beast, I became one with the beast!


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How come I don't hear any chirping in the 6k range?And I can set mine to run at 6k all day long,and it never surges or anything.In fact,it NEVER surges at all.It didn't when it was New either.I tried to see if I could replicate what a few were saying theirs was doing.No dice.Just smooth output in all gears and all throttle inputs.ONLY the very bottom rev range in the lowest gears created a notchiness in the driveability.That was removed with my Guhl flash.Didn't have a powercommander on there either.I should say the 'low rpm values' created burbling.Which was pretty annoying for a 25K motorcycle.It intensified when I fitted the Akra CT muffler and removed the canister.Don cleaned her up nicely.
 

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To the OP...

What gear are you in when it happens? Are you in higher gears with more speed and load on the engine, or lower gears and it's spinning a lot more and less load on the engine?

Another question...

What bikes have you ridden before this?

I had several ZX10's and their fuelling was always pretty good. The H2 was actually a disappointment in that regard, due to the throttle sensitivity.
 

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"if you let the bike ride you"...that wouldn't be any fun.Sounds like a LOT of work just tryin to get up to speed...any speed.
 

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I have tried pushing a bike 7.5 miles. Not exactly the same as letting the bike ride you, but kind of similar. Problem was, I made it only 6.5 miles before a car hit the bike and me. An individual wearing a hoodie at nearly 5 AM in mid 80 degree temperatures. Who had, it turns out, specifically signed to NOT have liability coverage.

I suspect I'd better not extend the idea to letting the bike ride me, who knows what would happen then, lol! :)

(Btw, I did understand the point, just having fun.)
 

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Glad ya didn't wind up DOA on that one.WOW.6 and a half miles is pretty darn good.Longest I pushed was maybe a half a mile...uphill,Harley softail Heritage.That was plenty enough for me.
 

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@h2madness! Well it seems maybe you're bike is already set up to resolve the throttle issue before you even noticed it was there? And cruising at certain revs at neutral throttle will vent the boost causing a flutter of chirping sounds. Perhaps your bike is too loud? In any case, we are talking about the bikes who do have the throttle sensitivity issues. You can't dismiss their issues just because you don't have it right?

And yes, it is a lot of work (lots of miles under the belt) but if you're never comfortable on the bike to begin with, you're gonna have a lot more problems than just throttle sensitivity.

Sorry that happened @trenace. I've pushed a bike 2 miles and it definitely wasn't fun! I was definitely under the bike's mercy at that point... anything she wanted, she got!


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"You can't dismiss their issues just because you don't have it right?"...God no.The performance 'issues' with the throttle are definitely real.I'm only saying that when I got my 2015,at any cruise speed it didn't surge.I would have noticed it.In fact when some were saying they felt that,I went out and really paid attention to see if it was doing it.It wasn't.IDK WHY it wasn't.I DID notice a rapid pulsing(after I'd ridden it for a several thousand miles)sounding like the motor.BUT...I replaced the chain and it went away.I can hear it in some of my 1st year vids I took. Chain care is IMO real important with this bike.It's very sensitive.I haven't ridden it again with the stock only bar end and no spacer.For all I know,it could be doing exactly what others are saying.No need though to go back the way it was.It's very good right now.

"if you're never comfortable on the bike to begin with, you're gonna have a lot more problems than just throttle sensitivity"...yup.TOTALLY agree. The seat was the first thing I got sorted out.After that,riding was really fun.And IS fun.My 14r sat all last year.And 2015.I just love this H2.
 

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"neutral throttle will vent the boost causing a flutter of chirping sounds"...nope,never experienced that either.Not at neutral throttle.Or under load.Only cutting throttle at various RPMs.
 

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My 2017 Carbon has a gas tank warning sticker not to use anything less than 95! A throttle lesson learned today, don't grab a fist full of throttle as the acceleration is so violent that I found it difficult to back off while my arms were being detached from there sockets. Just difficult to unwind if the wrist angle has been lost.
Seem so me that the throttle is not snatchy on mine, just instantly responsive. Also when revving in 1st or second it sounds like an air dump valve opens on de-acceleration. Sounds cool and gets looks. Must have a ride of a 2015 to compare the throttle response.
 

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"Seem so me that the throttle is not snatchy on mine, just instantly responsive"...yep.Instant.

Well...the throttle by wire is very sensitive.I had this happening on mine also when new.Didn't mean to imply it wasn't like the others.It was.But it held a steady cruise rpm(I rode her with part of my palm resting on the bar end).So I don't know what's happening there with these other ones.I SUSPECT it's the bike going over road anomalies and the throttle hand is moving without actually noticing it...the throttle is that sensitive.On the 2015's anyway.The Guhl flash is supposed to disable the Throttle by wire function,and the Broc mapping is supposed to smooth out the fuel delivery.I haven't ridden mine since I installed the stage 2 package(late last year)...but I'm dyin to...gotta wait a couple more months though....license.

Possibly the cable free play stock actually helps that cruising mode some.IDK.But a sharply adjusted throttle pull would increase the likelihood of it being more sensitive to inputs.I would think anyway.I have my free play adjusted pretty much out.Maybe a 1/16th of an inch free play on mine.
 

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Almost no free play in mine, adjusted it lock to lock before I took it out if the shop. I remember the first fright I got, adjusting my scarf with my left hand, enough movement to startle me with the slight movement of my body position effecting the throttle hand.
Personally I think all new buyers of the H2 should be given a complementary pack of adult pampers.
 

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I will chime in. If you actually want to have good control of your throttle you need to get away from the 1/7 turn throttle and get it closer to 1/4. Grinding down the throttle tube makes the thing much more controllable.
 
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