i noticed this the day before my wreck, and again today. the bike is very prone to stalling when starting out for the first ride of the.day. when warm my idle will fluxuate about 1-200 rpms. it has also stalled at a couple stoplights when warm. this seems likea fuel reg issue from what i have read. any other ideas before i go buy a new one?

Make sue your plugs are ok and haven't fouled.
If you decide to get a regulator make sure you get the latest as they have been redesigned a couple of times and as it may be crosslisted they may stock an older one.

Subsailor on an other thread noted they have vacuum lines going to it and if those leak the regulator may malfunction, so check them before you buy one. As RCs seem to have this problem it may be a wise part to stock for spare.

the stalling started after i changed my plugs, but i attributed it to a low idle cause i was sitting at 1000 rpms after plugs, flapper, and pair mod. after i cranked up the idle to 1300 it is still doing it. i also noticed yesterday that with the fast idle all the way out i never got above 1700 rpms, where previously i was sitting at about 2000


i guess the logical thing would be to pull the plugs and check em

I know on my old bikes a bouncing idle, was normally caused by carbs outta sync, or a vacuum leak. but since there are no carbs on this bike, i should prolly look for a vacuum leak. Is the slight bounce normal? it is literally only +\- 100 rpms over 1300

the other thing is, right after warm up if when it stalls it seems to not want to crank back up. it prolly take s a good 10 sec of hitting the started to get it to start. When it does start it seems to stumble starting. When the bike is at full operating temp, it fires right back up instantly.

im very confused on this, im going to check the plugs tonight when i get home.

ok so i went for a ride yesterday, the bike was idling low till about 180 degrees and then it smoothed out. didnt shut off at all yesterday. never had a power issue during all of this. never pulled the plugs but if it does it again i will.

ran perfect all.day.... then after it sat at the gym for 4 hours it stalled at the light leaving. it was warmed up to around 150 degrees at the time

fuel pressure regulater will make it do all of that. did to mine

im guessing since it all started when i did plugs and pair/flapper that maybe i pulled cracked a vacuum line loose or something. my replacement tail came in today so ill be working on the bike anyway so ill check. i did notice that when it was 77 degrees outside it didnt have a single problem with stalling.

im guessing since it all started when i did plugs and pair/flapper that maybe i pulled cracked a vacuum line loose or something. my replacement tail came in today so ill be working on the bike anyway so ill check. i did notice that when it was 77 degrees outside it didnt have a single problem with stalling.

I just did the flapper mod/removal. No issues at all.

im thinking if i did knock something loose it happened during pair removal due to work
ing around throttle bodies

im betting the fact that my airbox didnt get hooked back to my oil catch causing a airleak of unmetered air might have been it!

I don't think the airbox would be the main problem.
The MAP sensor for manifold pressure is mounted on the throttle bodies.

A loose hose to the throttle bodies causing an air leak would cause problems.
Especially the hose on the front throttle body that went to the flapper vacuum tank after flapper valve removal.
That should be blocked off.

that is blocked off, and fuel regulator wasnt leaking into vacuum line that i could tell.( pulled line no gas out so im guessing the diaphram is ok). vacuum lines looked in good shape with no cracks. that was the only thing i could find at all. other than the stalling bike runs great. it only seems to do it between 150 and 180 degrees so far. also never has done it when just idleing before being.ridden

so i jumped the green connector, all i got was a solid red fi light. does that mean no codes? just looked in manual no blinks means faulty ecm? im confused it says symptoms are engine runs normally

so i jumped the green connector, all i got was a solid red fi light. does that mean no codes? just looked in manual no blinks means faulty ecm? im confused it says symptoms are engine runs normally

Hmmm...says a solid lit FI light means either a short in the service connector wiring or a faulty ECU.

Just to try, have you pulled the ECU connectors and checked for tarnished/corroded pins? While at it, put a healthy dab of dielectric grease on the pins as well.

Plus you've checked to ensure your ground wire on the right side of the frame has a clean metal to metal contact and the bolt is tight? This has caused odd problems as well.

Otherwise, it might be a faulty ECU (it's electronics, and they do fail at times).

If you decide to replace it, Ben at RC51Parts.com has an SP2 ECU far, far, cheaper than a new unit.

ill check those tonight. it is just strange that it didnt do it till i did plugs and flapper/pair. in the manual under refer to page it just has a "-" could it be throwing this code due to a super crappy stripping job on my jumper wire? when we jump the connector, wouldnt that cause it to show the short in service connector code?

few pages back........" if the ecm has no problem.data in memory, the mil will come on and stay on"



im a idiot. should have read the whole section and not just the codes

took the bike out for a lil bit yesterday, and the problem didnt show itself again. im hoping that it was just the tube on the airbox being off. i know on old carb bikes a airbox leak causes all sorts of strange stuff to happen, so hopefully im good now

This damn issue is still going on??? Is there a connector, hose clamp, fastener you haven't touched inthe last month in this bike?:D

I hope you find a root cause and take care of it...this intermittent shit is a killer

its good now. took her out tonight and ran the piss outta her :)

took the bike out for a lil bit yesterday, and the problem didnt show itself again. im hoping that it was just the tube on the airbox being off. i know on old carb bikes a airbox leak causes all sorts of strange stuff to happen, so hopefully im good now

I had that same tube off on my airbox for a while and it did nothing to the way the bike ran. I did however have an issue with my fuel pressure regulator and it did all of these intermittent things. I bought a new one and when I put it on I noticed that the old one had a build up of corrosion in it. Someone told me they thought it could be form the ethanol we have here in Florida. Could be bull but there was crap in my regulator I did see that.

Anyway, the new one fixed the problem.

Then again, I also had a bad ECU at one time that would stop my fuel pump for no reason. Had to replace that too. But that was before the pressure regulator issue.

im going on a few hundred mile ride sunday, if it dosent do it fri sat or sun im betting im good. only time will tell i guess

Good luck man! Make sure your tool bag's good to go.

i always over pack my toolbag. with the bike not throwing any codes, running strong and the idle bounce gone im hopeful that im good to go now. as far as me having everything apart.... between the bike being hardly ridden before i got it, the mods that were done by po that i wasn't aware of, and my crash, yes i have had alot apart!

its ok though, that is just more that i know about the workings of this bike. as i have stated before this is my first fuel injected bike, all my others have been carbed.

Good luck, let us know how it goes.

Ride went great for me......... one of the other guys lost it and hit a huge log. We still don't know anything other than the ems hauled ass with him

Ride went great for me......... one of the other guys lost it and hit a huge log. We still don't know anything other than the ems hauled ass with him

Glad the ride went well for you. Too bad for the other guy. Where are you?

im in raleigh nc. so his bike is very trashed, he has a broken wrist, shoulder, and a pretty bad concussion but he will be alright. after watching that in my mirror yesterday, and flashing back to my wreck and all the friends i have lost on bikes i ended my day with a panic attack :(

im in raleigh nc. so his bike is very trashed, he has a broken wrist, shoulder, and a pretty bad concussion but he will be alright. after watching that in my mirror yesterday, and flashing back to my wreck and all the friends i have lost on bikes i ended my day with a panic attack :(

We all take that risk everytime we ride. You just know if you ride long enough, you will be going down some time in your riding career.

Thats why some of these manufacturers make such great gear to minimize the damage to a rider.

Take Care.

im in raleigh nc. so his bike is very trashed, he has a broken wrist, shoulder, and a pretty bad concussion but he will be alright. after watching that in my mirror yesterday, and flashing back to my wreck and all the friends i have lost on bikes i ended my day with a panic attack :(

Ya, I pretty much stopped riding on the street because here in Florida it seems the new thing is to rear-end motorcyclists that are stopped at red lights. Many people here have died in accidents that you just can't protect yourself from. I mean, you can keep your bike in gear and stare at your rear view mirror but you can't get out of the way of someone that comes up on you at 40mph. Once you make the dangerous choice of going out into an intersection it's too late, your done.

I have to agree with Florida riding. My last Bike Week three years ago will be my last...riding anyways.

I-4 is dangerous even for being in a car let alone a bike.

I like the feeling where you see it happening and you start summing up the parts cost before you have even hit the ground :)

She starts washing out, you look at the collision target and you start side fairing $300, mirror $40, muffler $400 pegs $120... BANG!!!

I was once hopping up and down on one leg (the other foot was pretty banged up to even think of putting down) going towards the bike to get it up and out of traffic's way, then two other bikers stopped and told me to go lay down on the side and they would take care of her. I had my wife drive me to a shop to get a clutch perch and lever and went back the next morning to ride her home. Then she begged me to go have x-rays on my foot, after the baby was at home again.

It is a state of mind. One night last year going home late I saw traffic stopped at a three lane urban highway and managed to get on side walk and keep on going slowly till I saw a truck at 90' to the highway. There was an ambulance leaving, a Hi-You-Bush-Ah all tangled up in knots and an other guy on the pavement, and a truck driver who had made a legal u-turn with green light (as witnesses said) but never completed before green turned on the other way and the Bush-A with passenger was coming at speed splitting lanes.... The first riders at the incident pulled the truck driver out and gave him a little exercise before car drivers told them it wasn't his fault.

Too many people and too many police-dudes around for me to be of any help. Then, flash! A really open 3 lane highway with no traffic ahead, and definetely no police all the way home! What a ride that was :)

I have pulled out of a red light and onto the sidewalk twice in my life after judging car lights coming my way and had no clue I was at a red light. I would have been toast and dismembered both times if I hadn't. The one time the guy passed me by 4' away then hit the brakes past the intersection and skid half a block when he realised what he had just done.

An other time with a car in downtown Baltimore I was at the red light of a 4 lane street and the lane next to me was open, I see one guy coming from behind at speed not slowing down and an other coming down a slope to cross, I make the car jump forwards and the guy coming at 90' from me slams the brakes, hi-beams on, beeping and cursing, then a car goes past right in front of him doing 50+ right through a red light. It took him a while but as he went by he raised his arm out and gave me a thumbs up!

I really learned how to ride defensively when I drove a big truck. After a while you have seen ALL scenarios play over and over again .... all excitement is gone.

So im thinking im going to replace the fuel pressure regulator anyway, i gassed the hell outta it last night screwing with my buddy on a harley. Apparently i backfired at some point and blew flames outta both pipes lol. granted that was in a 45-100 wide open throttle jump. Normal or not?

So im thinking im going to replace the fuel pressure regulator anyway, i gassed the hell outta it last night screwing with my buddy on a harley. Apparently i backfired at some point and blew flames outta both pipes lol. granted that was in a 45-100 wide open throttle jump. Normal or not?

they are known for it. Only $50 from honda. easy fix for piece of mind

so i replaced the regulator, and acceleration seems alot smoother. however my idle still loopes some and will randomly jump up at a light a few hundred rpm