HEY Turbo Tom.

[MOTO JUNKIE]

I installed the FPR. I really dont feel that much, if any, difference. It does seem to move away from a stop a little easier, but not dramatically. Is there something I should know that wasnt covered in the instructions?

[Byron]

Moto Junkie,

Not speaking for Tom but for myself and my experience with his FPR install on my bike, '06 ST. Before the install there was a bit of a flat spot as you began to take off and another one higher in the RPM range. If I didn't slip the clutch a little or bring the RPM's up some on take offs it seemed to stall out easily. Plus it was a bit jerky when going from no throttle to a little. It wasn't really a problem just sort of an annoyance. I had already adjusted all the slack out of the cable. After installation of the FPR those problems disappeared. It no longer seemed jerky at low RPM's. It simply ran better.

The reason you won't feel much difference is that the computer on the bike is automatically correcting the mixture as you ride. At the bottom end by the time the bike senses the richer mixture you are already past the normally lean area and it was feeding on a richer mixture. The same occures at the second lean area higher in the RPM's. The rest of the time you are cruising it simply cuts back the extra amount of fuel being provided by the higher pressure of the FPR so it has the correct mixture.

If I've mis-stated anything or left something out I'm sure Tom will let us both know.

[Keendog42]

I have the same opinion. I can't tell the difference either, I was hoping that it would cure the on/off throttle response but it hasn't changed. This is my first bike with FI and so far I'm not convinced it's any better than the carbs.

[MOTO JUNKIE]

Well, I understand. Maybe because it has been a few weeks, and I have already gotten used to the new feeling. Just fishin for another input I guess. I thought I had read " dramatic improvement" from others. Thanks, Matt

[Mongo]

I installed my FPR Tuesday, I imediatly felt smoother on/off throttle power, much smoother acceleration between 3 and 4 grand on the tach, and also more acceleration at lower RPM. I purposely ran down to 25mph in 5th gear and right back without a hint on hesitation on a slight uphill grade (I couldn't give a degree of inclination) and I am very satisfied. Best farkle for the money I have made. I hope your situation turns out better.

[MOTO JUNKIE]

My next ride I will study the response carefully. If I could only hold it in the middle somewhere between closed and wide-freakin-open. Woohoo. Gotta love this bike. Just cleaned her tonight.

[sickchilly]

I installed one the weekend after labor day. So I've been riding with it for almost two weeks now.

The difference was subtle, but definitely noticeable for the better on mine. I never really had a complaint about throttle snatch, maybe I just have good throttle control, I don't know. But even still, I noticed smoother transitions in stop 'n go traffic. I've got a K&N with the FPR, no other motor mods, and did notice a bit more eagerness in the upper revs. From about 4500 on up, it seems to scoot a bit quicker into the red. I got the front end off the ground in 2nd by mistake... hadn't done that before.

I've only been through two tanks, but it's looking like fuel mileage increased about 1.2 mpg. No idea why that would be as I think I've been heavier on the throttle lately. Or maybe it was because of all the rainy days we've had lately. Really gotta mellow out on this bike in the rain. It's such a torque monster, the rear end will get squirrly with ease.

Overall, I think it's an improvement. The engine just seems to run smoother and is more eager to play in the upper ranges.

[AZST]

I rode the bike w/out FPR for about a year. I was well aware of the "flat spot" situation.

First day I installed the FPR, it was gone. I could not believe the difference. Was it dramatic? No. Unless the flat spot bothered you, like it did me. The bike was more enjoyable (if you can believe that) to ride. For $100, well worth it.

If you felt no difference, install the original and ride it for 6 months straight. Then, reinstall the FPR. You will notice it.

Thanks again Tom. :yes:

--Bryan
04ST1300A
:04biker:

[Jefro]

I noticed a stronger low end response, and the motor pulls harder in the upper band. And it is definitely more fun to run hard thru the gears. Maybe that's why my gas mileage has dropped. I'm having too much fun with the throttle.
But the best improvement for me is the on/off throttle snatch is gone, something I really disliked about the Honda fuel injection on this bike.
I also have the K&N filter.
Money well spent in my book.
Jefro.

[AZST]

....Almost forgot....my mpg also improved...slightly, but better. :yes:

--Bryan
04ST1300A
:04biker:

[Keendog42]

Well, I didn't have many miles on the ST before installing the FPR (500). I didn't have a lot of time to get used to the bike before the switch so you guys are probably right, if I went back to the old one I'd notice a difference. I still can't get rid of the on/off throttle response though.

[racer1735]

You really won't notice any hp or increased performance gains (other than slightly improved mpg numbers, but this is dictated more by how high or low you run your windscreen or govern your throttle hand than anything else). What you will notice, or sense, is that the power deliver is smoother in certain areas. If you never noticed any surging then you probably won't notice any improvement from the fpr.

[Byron]

Question: For those that seem to be noticing on/off issue have you adjusted the slack out of your throttle cable? From the dealer mine had extra slack. You could twist with no affect then when the slack was gone boom you were off to the races. Adjusted out the slack, be sure you can still make full left to right move without RPM's increasing, and in no time was used to what amount of movement was necessary for smooth starts.

Just a thought.

[sherob]

I installed my FPR Tuesday, I imediatly felt smoother on/off throttle power, much smoother acceleration between 3 and 4 grand on the tach, and also more acceleration at lower RPM. I purposely ran down to 25mph in 5th gear and right back without a hint on hesitation on a slight uphill grade (I couldn't give a degree of inclination) and I am very satisfied. Best farkle for the money I have made. I hope your situation turns out better.

This is where I noticed the biggest gain. Low end grunt has been improved... throttle snatch will improve if you remove the slack out of your cable... by turning the nut counter clockwise (IIRC) on your throttle cable housing. ;) I ran over a full year without... so I did notice a diff after install ;)

[panman40]

I fitted the FPR about 400 mls ago and straight away noticed a big improvement with the on off throttle jerkyness and the surging i was getting at a steady throttle at lowish rpm's.
However it seems as if a slight jerkyness and a little hesitation has come back ? not sure why though.
Also it was returning 50-54 mpg before fitment and now it's 47 ish:confused:

Martin.

[ga06rider]

Just installed mine. Didn't have much time to play afterward because it started raining as I was leaving the house. I rode anyway. I'm feeling much better throttle response and less snatch on/off throttle. That's why I got it so I'm happy. I must ride differently than whoever is getting high 40's to low 50's mpg. Haven't checked using the calculator but the indicator on the dash says about 38.6. One thing I'll add to the installation instructions for those who have Helibars. I had to remove the left handlebar to raise the tank. Bummer. Definitely needed the impact driver.

[Keendog42]

It should go up a little now. I was getting between 39-40mpg after the FPR install I get about 40-41mpg. The only time I even get close to seeing 50mpg is when I'm following my dad on his Valkarie with a side car.

[ga06rider]

My friends still ride Harleys so maybe I'll be riding slow enough to see that 50mpg yet!

[Lager]

Honda designed the new St to meet Calif 2008 emissions. This mean Cat Converters and ultra lean Fuel mixtures. Lean meaning less and less fuel.basically, barely enough to make the engine run..This is all done thru the fuel injection control unit.Thus all our little annoying glitches,detonation,surging and flat spots.Thanks Honda.:(
Turbo Tom,s fuel pressure regulator increases your fuel pressure to allow a richer(more fuel) mixture.This helps eliminate all the above problems,but at a cost. Less fuel mileage. Thats how it works,plain and simple.

[panman40]

It should go up a little now. I was getting between 39-40mpg after the FPR install I get about 40-41mpg. The only time I even get close to seeing 50mpg is when I'm following my dad on his Valkarie with a side car.

I dont always ride slowly infact often around the 90mph mark but when the mood takes me or the other half is on pillion i ride more sedately!,

When i first installed Toms FPR the difference was really noticable so cant think why the surging/hesitastion and on/off snatch has come back?.
I bought the ST for a long term ownership but if i cant sort it it's going to have to go as its doing my head in!.:mad:
Tom says i should check Fuel pump pressure/Flow or could be a dodgy injector but lack of funds rules out getting this checked out.

If anyone else is experiencing these probs after fitting the fpr i would be interested to know !.

[Byron]

Martin,

Your problem may be like Tom suspects. You just picked up the '02 with 5,000 on it. That sounds like a lot of sitting over the years. Without the proper storage routine it probably has varnish in the fuel system and either clogging the fuel pickup or possibly the injectors. You might try running a fuel injector cleaner through it for a couple of tanks and see if there is any improvement before handing it over to a shop for diagnosis.

[panman40]

Martin,

Your problem may be like Tom suspects. You just picked up the '02 with 5,000 on it. That sounds like a lot of sitting over the years. Without the proper storage routine it probably has varnish in the fuel system and either clogging the fuel pickup or possibly the injectors. You might try running a fuel injector cleaner through it for a couple of tanks and see if there is any improvement before handing it over to a shop for diagnosis.

Yep thats just what i have done tonight!, just put in some injector cleaner with a full tank of fuel but only time for 50 or so miles!,
Just cant work out why it was ok when i first fitted the fpr:confused:
Cheers,
Martin.

[Keendog42]

Good luck, I hope that it works out for you. I have an 06' with 2000 miles on it and the on/off throttle response is the worst that I've ever had. I adjusted all the play out of the throttle and installed the 61psi FPR. Yes it is better now but still not as smooth as it should be. Not very confidence building when rolling on the throttle in the middle of a corner.