flat spot?
 

i have just had a PC fitted to the blade, now if im crusing at 30 with no revs in 2nd, then pull on throttle it takes about 2 secs to respond?

the same will happen in 3rd?


......... also its crap on fuel? doing atleast 20miles less to a tank......


(just poped home from work for tea, and to consult the org........ back at 10pm)

Re: flat spot?
 

Sounds like its Fuel air is Fubar. Has it been set-up on the Dyno? What mods you done to warrant a PC3?

Though I used to get a similar thing happen before I balanced the TB's. Cant imagine itll be the same for you... Il4's dont really get that upset about TB balance.

Re: flat spot?
 

Has it done it since the PC was fitted? I reckon a connector has been disturbed or it's running on a totally wrong map.

Re: flat spot?
 

yes i have only noticed since he fitted the PC

now, its got a k&n and a stubby can, also the h-vix (ex-up valve) has been fully opened and disconected (due to the motor packing in)

the guy is an ex racer and works in a main dealer (he does work in his spare time) and has a very good rep...... im going to phone him tomorrow to explain

the bike seems a lot better once its going, but i think i got 20 miles less before the light came on, plus the can poped, which it has never done b4 (overfueling?)

mr honda fitted the h-vix valve for a reason, so.... im thinking of getting a new one, then taking it to a dynojet place to set up properly......... as there is not a perfect map for the can i have........... the guy said he did the closest he could?

Re: flat spot?
 

Till then maybe try some different maps off of the web site for your bike and see how they feel?

Re: flat spot?
 

Nah, don't **** with it, take it back and tell him it's all wrong. Is it actually worse than it was before? If so, just disconnect the PC in the meantime.

Personally I wouldn't ever get any fuelling work done by anyone who doesn't have a dyno, yes you can get it spot on with just experience and skill but that's very hard to do on a bike you don't know inside out. I can do it with SVs for instance but I couldn't do it on anything else. So if you turn up with a bike he's never met before, he's got no starting point and he doesn't know what right feels like.

Re: flat spot?
 

yeah.............

im not convinced removing the exup valve was a good idea?

Re: flat spot?
 

Dunno, presumably it's there for a reason but that's not always a good reason to keep it, might be an emissions thing or something.

Re: flat spot?
 

yeah..... as i said the guy has a good rep,

from what i understand (which is not a lot) the valve opens at high revs, but mine is open all the time, so its over fueling? hence the 20miles less i got......... why its not pulling away at low revs i dont know

Re: flat spot?
 

Removing exup will lose you bottom end torque cos of hot cams and no backpressure.

Should have lots of power but feel to have quite a powerband about 2/3's up rev range.

I reckon mixture is wrong, get an A/F run done on a dyno and see what's happening.