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Carb Cleaning on a 98?

Old 09-12-2005, 05:58 PM
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Carb Cleaning on a 98?

Over the past few days, the bike has been really crappy at ~3800 rpm, diing at the occasional stop, etc. Sometimes makes power, sometimes feels like it isn't. The PO told me when I bought the bike I'd have to clean the carbs every once in a while, pretty often. I know he drilled the airbox and put in a K&N, but I doubt this is the problem.

Anyways, I got some through-the-tank stuff and am running that, and I could swear the bike feels better already. But he said to use the spray in stuff (pull the tank, the airbox lid and filter, and then just go to town?). I'm wondering if:
1) Is this common to have to do this all the time?
2) Is that the right way to do it?
3) If I run carb cleaner through it once every 5-10 tanks could I avoid this altogether
4) Should I perhaps be checking the fuel filter?

Also, I'm wondering if perhaps there's a loose plug wire or whatever. I could swear the thing pings a lot at very low RPMs and at idle - especially when it's cold. It could just be too lean down there (not that it's super cold out here), but I wonder if perhaps my timming is off. He said it's stock. There's also some funky aftermarket manual CCT on the bike (there is only one, right?). I would like to figure out how to adjust it. All I know is it's red, billet, low profile, and "APE manual cam-chain tensioners."

There's more small issues, but they can wait. I just don't want to break anything important like my motor, swingarm, or neck. :-) Thanks guys!
-Abe.
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Old 09-12-2005, 08:37 PM
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Re: Carb Cleaning on a 98?

Umm, been riding for over 25 years and had even more bikes than that (bike *****) and I've never heard of having to periodically clean carbs. Something's fishy here.

If the bike has always had issues in that rpm region, I'd advise to raise the needles. That usually does the trick.

No stock filter except for the petcock's pickup tube inside the tank is a screen.

Each cylinder has a tensioner.
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Old 09-13-2005, 06:37 AM
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Re: Carb Cleaning on a 98?

i had a similar problem with my 97.all that happened was the inlet stub on the front cylinder where the tube attaches to balance the carbs had come off ..hence the shitty running...due to a weak mixture on that cylinder of course.worth a look mate...cheers
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Old 09-13-2005, 08:49 AM
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Yes, it is. Thanks, I'll check it out. Poking around here I found out the technical docs, and my TPS is 850 ohms, so fixing that should help. Unfortunately, and "as usual", a woman showed up as I was just getting into the middle of things so the bikework pretty much stopped. C'est la vie.

I wonder if I should get a longer "inlet tube" for my other cylender. Not that I need more botom end, I keep mashing my unmentionables and helmet into the tank as it is when it pops up to say hello. Anyways, there was an article on cleaning the needles, too, which I might have to do the right way.

BTW - the needles are already richer aftermarket ones, and shimmed too. Perhaps it's too much, though the plugs looked good when I had them out.
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Old 09-14-2005, 06:52 AM
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Re: Carb Cleaning on a 98?

Where in San Diego are ya at? OB here.

The strip down and cleaning of the carbs is easy....did mine early this summer. Did each one seperately....as to not mix the parts.

Mike
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Old 09-14-2005, 09:09 AM
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Can't help much with the carb issue... but... Im in San Diego everyday... Miramar....

maybe we should get together sometime for lunch....
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Old 09-14-2005, 11:36 PM
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Hey! Sounds like there's a bunch of us here. There's supposedly a big biker meet every thur in Mira Mesa (where I live, coincidentally) at the starbucks right off the 15. That's by the Edward's theatre. I can't go tomorrow, but perhaps next week? I'd be down for finding some fellow listers.
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Old 09-14-2005, 11:39 PM
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Back to topic:
I did the cleaning, yes my slides were way scuffed. Used some gun lubricant. Also did the TPS adjustment. It was at 825. I didn't get a chance to rebalance the carbs - I wasn't sure I'd need to?

Anyways: The bike fired right up, idled like a dream. Totally smooth. Even cold, and down at ~800 rpm, it was wonderful. So impressed was I that I went to my roomate and told him. After a few minutes it finnaly died (don't know what RPM it was at, I was in the other room).
The trouble is I couldn't get it to start. Ran terribly rough, and then wouldn't start at all till the battery died.

Perhaps at that low an idle there isn't enough vacuum to open the fuel valve? It was odd it started to fast the first time, really, I figured the bowls would be dry. Well, it's back on the charger, but if it doesn't start tomorrow expect some worried posting!
-Abe.
P.S. All that's left is oiling the chain and maybe brake bleeding....
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Old 09-16-2005, 05:19 PM
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Re: Carb Cleaning on a 98?

Bring it on over to OB.....I'll show a the Mighty Vac sync !!


Mike
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Old 09-16-2005, 06:00 PM
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mighty vac sync?
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Old 09-16-2005, 09:45 PM
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Re: Carb Cleaning on a 98?

Originally Posted by VTRFISH";p=&quot View Post
Bring it on over to OB.....I'll show a the Mighty Vac sync !!


Mike
I want to take you up on the this for sure....
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Old 09-17-2005, 08:50 AM
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Re: Carb Cleaning on a 98?

It's a very simple way to sync your carbs useing a Mighty Vac brake bleeding tool, a couple of hoses, and a plastic hose "T" or two. Normally only takes 30 mins or so to set up and adjust.

Mike
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