Hello everyone. Allow me to start out by apologizing for this post - I'm sure you lot are inundated with people whose first posts are troubled Ruckus owners trying to get help. That's gotta be annoying after a while. However, I need help and this seems by far the best place to ask.
Anyway, I've got a troubled Ruckus (duh). As history can matter in these situations, I'll give a quick run-down:
[*]It's a 2006 model with ~7700 miles on it
[*]It was purchased by my wife used about 7 years ago or so, already lightly modified (Kijima stretch, Polini variator, Airbox delete, Yoshimura exhaust)
[*]It was stolen and missing for about a year before finally being recovered. The thieves removed the Yoshi exhaust and replaced it with a stock exhaust, and swapped out all the locks. No keys were recovered. It also has a hot-wire switch rigged up.
[*]It then spent another year in storage in a warehouse 700 miles from me, uncovered and being shit on by birds.
[*]I finally received it about a week ago.
Since I knew it had been sitting, I hit it with the basics:
[*]Oil changed with 10w-30
[*]New spark plug
[*]Fresh 93 octane gas with a couple shots of Seafoam
[*]Two rounds of bird-shit scrubbing that still hasn't removed it all. All done by hand, no spraying of water.
[*]Checked the battery and cleaned the connections; it's all good.
I then went to start it and it would sputter a bit and then die. Hit it with some starting fluid and it fired up right away but would not idle. Opened up the carb and found the idle jet totally clogged. I cleaned both it and the main jet with some 28-gauge wire and a judicious amount of carb cleaner. Put everything back together and it ran great...
...for about an hour.
I'd taken it out for a shakedown cruise and aside from some dodgy rear brakes (needs shoes) it performed just fine if a bit slow. About 37-ish top speed on the flat, but I recon that's just variator tuning to be done. I stopped off at a cafe for a cup for about 30 minutes and then decided to head home. She started up immediately and seemed fine, but before I set off I had someone approach me and engage me in conversation (you know, the "Hey, is that a Ruckus?" type). As a result, I sat there at idle for 3-5 minutes.
When I finally set off for home, something was clearly not right. Giving it anything more than about 25% throttle generated more noise but no corresponding increase in speed. If anything, it was slowing the thing down. I limped it home at about 20mph. I figured some gunk had worked its way loose thanks to the Seafoam and clogged a jet again, so I took the carb off and opened her up. Sure enough, I found some sand-grain bits of varnish in the bottom of the bowl, but the jets were both clear.Note
: at this point I discovered the idle jet is a 38. No clue on the main, but this (as well as some badly rounded screws on the carb) was a big hint that it wasn't left stock by one of the previous owners.
Not finding an obvious fault, I further disassembled the carb. The diaphragm, float & needle valve, piston/slider and corresponding needle looked good; no tears or visible gunk anywhere. Sprayed out every passage I could find and put it back together. Found the TPS reset procedure in a Google search and did that as well. Put everything back together again and went on a ride. No effect.
Further Google searching led me to an article about shimming the needle with an M2.5 washer, so I thought "Hmm, maybe it's leaning out." I stopped by a hardware store and picked a few up, and took the carb apart again. Turns out the needle was already shimmed, so now I thought "Hmm, maybe it's going too rich." Took the shim out and put everything back together again. No effect.
More Googling. Found a few more ideas, but nothing that seems to fit my situation:Intake air leak
: Ok...but from what?
Here's my intake:
The "snorkel" is in good condition, as is the boot connecting the carb to the inlet manifold. The hose on the lower left of the engine has been capped, and everything else is venting to atmosphere. Also, this problem appeared suddenly, not gradually. Doesn't seem to fit.Bad fuel pump/fuel filter
: Well, the bike has never stalled during any of this, the bowl was always chock-full of gasoline when I would take the carb off, and there's no noise coming from the fuel pump. I think fuel starvation is unlikely.Slipping variator belt
: Ok, I know it's subjective, but it just feels
more engine-related to me. It also does this on the stand, when there's no resistance on the driven wheel. Here's (an admittedly shite) video:
Carb jetting is off
: Yes, the go-to answer to any "my ruck isn't running properly" post. This makes the least sense to me of all the potential options, as it had been running perfectly for about an hour and then suddenly wasn't. I do have reason to believe a larger-than-stock main jet was installed in the past (known history of aftermarket exhaust, intake mod, idle jet is larger, needle was shimmed) but even so, I can't imagine this being the cause - because, as I sad, it had been running perfectly fine for an hour and I can't imagine it's such a large jet that it's totally flooding the carb out. It feels
more lean to me (again, totally subjective).
Bad ignition coil
: I guess? This doesn't seem right to me either - why would the quality of ignition be dependent on the throttle position?
So there we have it. I'm at a loss as to what's causing the problem, and I don't want to start ordering parts willy-nilly as the prices for Ruckus parts are a bit ridiculous for what they are (most are more expensive than the corresponding equal on my big bike). I need some guidance here. So, a few questions:
[*]What else can I test before ordering any parts? And how do I test those things?
[*]Is there something other than the jets that can become clogged and cause this problem? Have I overlooked something?
[*]Where do I go from here?
Mighty appreciation for any help you can give me. I'm getting pretty desperate...I had one glorious hour of ruck bliss before it all went to hell, and I've been gutted ever since the problem began. My shite mood is even driving my wife crazy, and I'm getting low on consolation beer.EDIT
: Not sure why the BBCode isn't parsing; sorry about that if I've done something wrong.