takehikes wrote:
The big win with FI is of course is starting but I think even bigger is its ability to adjust for altitude. Performance is much better than with a carb at altitude.
I ride from near sea level to 6-7k feet quite often and the Roadie gets mighty doggy. That is when I wish I had FI and not the 42.

+1 on this and temperature and humidity. my wife's vstar 650 starts and runs smooth as silk in fall and spring. cold winter days and hot humid summer days, u gotta spend some time gettin it started and running smoothly. ive not experienced that with the last 2 fi bikes ive had

pastornj wrote:
jd750ace wrote:
So, nobody tells you that you MUST bring in your Yamaha for the initial service so they can "flash the computer" and unleash all the engine's power? That was one going around on H-D FI bikes for a long time, that the bike was delivered with the computer in a "break-in" mode so you couldn't possibly abuse it during break-in.

There is ECU tuner software which can be downloaded for free for other bikes so I'm thinking that's the case for FI Yamahas as well.

We just did a complete unlock on my son's Rocket III - a dude in CA sent him a modified map for his existing setup free! His primary injectors were limited to 25-30% of max power all the way through 1st & 2nd gear and partially through 3rd. Now his bike is waaaay more of a beast than it was before - power wheelies shifting into 2nd are not a problem at all!

Erbman - check the Strat forums and Yamaha tuner forums. I'll bet there is software you can download to your laptop for your bike. Drop $20-30 for a cable to connect and Voila, you're a tuning guru!

I stand, or actually sit, corrected!

Apparently, there is no way to remap your ECU - not enough volume of sales for strats/roadliners/V-Max models and the ECU is locked.

You can spend lots of money on a Power Commander V - and supposedly, if you have the right equipment, tune it to a certain extent - it is a piggyback unit which continually overrides the stock ECU.

Personally, if I had a Strat and wasn't happy with the FI setup, I'd figure out if converting to an HSR45 was doable.

I know someone will not be happy with my next comment, but here goes anyways:

This demonstrates another reason why the Motor Company does so well and has such a solid following. Sheer numbers of production bikes make aftermarket companies interested in working on their products. FI tuning software & hardware is abundant for HDs.

NJ

How about swapping a Warrior ECU for my 2008 FI R*? Can it be remapped?

I'm still fouling my back plugs. I was hoping a power commander V would solve my problems. I thought this was a replacement for the ECU not a piggyback unit. The unit claims to map your cylinders individually, I was getting my hopes up.

I'm new to Fuel Injection, but I work on computers for a living and I'm excited about being able to tune my bike to the way I ride.

Any thoughts of why I'm fouling? I've did the poor mans BAK, the PO drilled the stock exhaust, it's got a K & N filter in it. I'm running Iridium plugs. 87 oct. MMO & Sea Foam regularly.
There is a spot between 58-61 MPH (approx), 4th gear is rapping pretty high, but if I shift to 5th before 63-65 MPH, it coughs and runs rough. You can accelerate through it, but there has to be a reason for this dead spot.

Think I would start looking at throttle bodies and injectors for the problem.

FI is nice smooth efficient powerful, start and run great but I like the way my 99* burps farts pops idles like a headless chook, sounds like it loses 1 cylinder at times and in general runs just fine ,I call it character

Aussie John wrote:
FI is nice smooth efficient powerful, start and run great but I like the way my 99* burps farts pops idles like a headless chook, sounds like it loses 1 cylinder at times and in general runs just fine ,I call it character

Totally this! My buddy has a really nice FI VTX1800. It doesn't have the soul and characteristics my old roadie. I swear he is going to sell his and buy a star.

I'm going to check out the fuel injectors first.
Although I've re-jetted carbs on all of my bikes, I'm digging this Fuel Injection and am going to do what ever it takes to make this bike run perfect.

I can ride around the dead spot, no biggie, I will continue to ride. I don't think any sea foam or MMO was run in this bike in the first 37000 miles. I wonder if my use of sea foam for the last 4000 miles is cleaning things out?

Should I start a thread over in Maintenance Forum?

It may be that your bike would benefit from an on-board injector clean, some times the inlet valves get a build up of carbon on them and some fuel is soaked up on the carbon, this is mostly coming off idle. maybe if you talk to the fuel injection experts they will give an opinion which might save lots of time and money chasing faults that aren't there

I agree, but I think the few FI guys here aren't having any trouble. I hope to be one of those experts, one of these days. This is a very cool bike too work on.

Gadgetman, you wrote: There is a spot between 58-61 MPH (approx), 4th gear is rapping pretty high, but if I shift to 5th before 63-65 MPH, it coughs and runs rough. You can accelerate through it, but there has to be a reason for this dead spot.

I'm just wondering, do you have baffles in your exhaust? The coughing doesn't sound like a baffle tuning problem, but detuned pipes can effect your mid range performance.

If it runs ok up to that point, I would suspect one of the sensors. If you want to spend the money, a good wide band AFR properly installed on that bank would give you a reading.

However, I'm new to FI too, but if mine was fowling out the plug on a jug, I would want to get a reading to see just how much, and when, it is running rich.