Hi all,

My MC28 has been sitting over a year (shame on me) and now it won't start. Everytime I kickstart it, all the fuel coming from the tank comes out one of the top carb hoses like a garden hose.

Any idea what's wrong and what I should do?

thanks,

-Brad
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-Aradune

Strip the carbs!

Fuel coming out of the overflows points to dirty float bowls. Maybe fuel that has turned to goo or varnish over the course of the year!

Worst case scenario is that the bike actually starts, but one (or more) of the small jets is blocked and you ride off and seize it!

Stripping and cleaning the carbs will only take an hour or so if it's your first time, and the problem will probably be immediately apparent as soon as the float bowls are off.
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Andy.
NSR-WORLD.COM

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thanks!

Are there any workshops/people that work on 2-stroke street bikes (and preferably any Japan-only sport bikes like the RVF400) in my area? I'm in Vista, which is north San Diego County.
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-Aradune

with the collection of bikes you have (from your other posts), you must be able to strip the carbies yourself?

I've always been a fan of DIY, as long as you know someone else has gotten themselves into deeper problems and is there to help you out!

Cleaning the carbies isn't that hard to do.

I'd certainly rather be doing it on the NSR than any other bike in your collection, that's for sure!

Maybe you've not had to pull the NSR apart before, and all you have to go on is previous experience of one or more of your other bikes? Trust me, if that's the case the MC28 will be a breeze!

Get yourself and MC21 and it's even easier still!
_________________
Andy.
NSR-WORLD.COM

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Going to try the carb cleaning myself (with a friend who knows bikes better than me). My query about any mechanics nearby was more of a general questions.
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-Aradune

When I stripped my carbs, the float bowls were clean but one slow jet was fully blocked and the other partially blocked. If you have the carbs apart its worth checking every jet is clear.
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Rich
MC21 Track Bike / RS250 NF5 'Spencer', NX5 'Cadalora' & NXA 'Aoyama' / RS500 / Two Brothers Racing RC30

question: should the air filter be dry or wet with oil (like a 2-stroke motocross bike)?

thanks in advance,
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-Aradune

I run my (pod) filters dry. Stand-off from the carbs will keep them damp enough.

The MX filters run wet to trap dirt off-road, which isn't really necessary on most road bikes. A wet filter is more restrictive than a dry one.

Opinions will vary!
_________________
Andy.
NSR-WORLD.COM

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Yikes Spent the afternoon taking the carburetor out and cleaning the floats and the jets. The jets were definitely dirty, so we cleaned them and the bowls. Unfortunately no-go -- it still won't start. What's strange though is that the gas doesn't dump on the floor anymore. *boggle*

We replaced the spark plugs and also looked at them and there was definitely a spark. They didn't look very wet, though, either. So if the fuel isn't being stopped at the float bowls and going out through the overflow hose, I assume it could be further stuck after the float bowls (e.g. the problem is between the float bowls and the spark plug)?

Any idea?

thanks in advance,

-Brad
_________________
-Aradune

Charge (or possibly replace) the battery.

If it's not 101% they can be a pig to start.
_________________
Andy.
NSR-WORLD.COM

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stupid questions first....have you reconnected all the tubes to the right spot? Fuel tap on? Kill switch set to run?

Did you accidently bend the tab on the float height adjuster?

Well, after several kicks the bike started and sounded really good. We shut it down and then put everything back on the bike. Now we can't get it started again -- it begins to start and then quickly dies before we can give it any gas from the throtle. It reminds me of a flooded MX bike.

The battery is definitely charged -- I left it charging last night, but this morning it was the same -- still barely starting and then dying. I wonder if we put the main jets back on right, or if it's running too rich now and that's why it doesn't start.

Ideas?

-Brad
_________________
-Aradune

i charged one of my batteries on my other bike and thought it was full but wasnt, i normally leave the charger on bike and kick it over that will tell you if there is enough in battery to start it properly

depends on the charger; you could cause severe damage to a charger if not disconnected. As happened to my boat last month.