What could be wrong with my VFR??

[Stew]

Okay, somebody please help.
My NC30 starts up fine when it is cold, however whenever it is warm it just wont start. It appears to be that the battery isnt providing quite enough power, however it is fine when the bike is cold.
Before I shell out for any new parts (which may not be the problem) can anybody shed some light on what the problem could be.
It gets rather embarrasing when I pull up at the petrol station, fill up go and pay then have to bump start the bike to get her going again.

(I have no problems bump starting btw, just normal starting using the start button)

I have had a couple of suggestions which point towards either the starter motor (sounds normal) or maybe regulator/rectifier (as the lights tend to dim when the engine is revved). I think I will need to get busy with the multimeter, unless someone here has a clue.

[retrofly]

Hi
Sometimes a starter motor can sieze up when hot, thats what happened to my dads car anyway, it would be fine cold but when he tried to start it from warm it wouldnt go so in the end he had ti get a new one, thats just my thought anyway wait for one of the pros like Kireth or kornel to post an answer

Luke
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www.geocities.com/retrofly

[Dan]

mabie u need a new batery or charge it up

[Scooby]

Not a solution m8, but to save the embarassing petrol station moments, get another key cut and leave the bike running, bang it on its stand, fill her up, pay and bob's your uncle. This is fine till somebody nicks your bike....but hey.
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A big enough hammer fixes anything!

[Dan]

[Scooby]

I know but it won't do any harm, in real terms.
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A big enough hammer fixes anything!

[Ropehead]

MY Mate has the same problem when it's hot u get 2 much compresion making it a cunt 2 start. or u could have 2 much fule causing it 2 flood it slightley,
hope this helps
ROPEHEAD

[Kickstart]

Hi

Does the bike turn over and just not start? If so I would suspect you are suffering from fuel vapourisation, which can happen easily on a compact engine like a V4. Basically the carb is warmed up by the engine and the fuel evaporates, so when you try and start it the mixture is really rich. To get round this try using full throttle when you start it, and be prepared to back off quickly. If this is the problem then there is probably a missing heat shield on your bike)

The other possible suggestion is that the bike is flooding while parked, normally caused by wear in the needle valve or wrongly set carb float heights. Petrol will flow into the engine, and is basically uncompressable so the starter cannot turn the engine over. However, it would also be difficult to bump start the bike. From cold the petrol would have evaporated, but no more would have come through as you will have a vacuum operated fuel tap.

All the best

Keith

[Scooby]

Keith I am beginning to think you are a machine, I mean how much do you know about bikes!!

No offence or anything though, because it's not a bad thing, I was just saying!!
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A big enough hammer fixes anything!

[McJamweasel]

Hes not a machine, hes just got the Idiots Guide to Motorbikes sat next to his PC - Ive seen it!!
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BCF: Be yourself, just don't be an arse.

[Kickstart]

Nah, not the idiots guide. Got the NSR manual, NS manual, GTS1000 manual, Gilera CX125 manual, Aprilia engine manuals, Cagiva C12 and Mito manual and the Bimota Deici manual by my PC. Most of the rest are upstairs, but most of those are car manuals

All the best

Keith

[McJamweasel]

Well, close
____________________
BCF: Be yourself, just don't be an arse.

[Kickstart]

Hi

You ever tried finding an idiots guide to bikes. We spent ages trying to find one for a friend. Zero mechanical knowledge, but willing to learn

All the best

Keith

[McJamweasel]

Aint that called the NSR125 user manual.

It doesnt just xplain the control layout etc but also how to start and ride the goddamn thing!!
____________________
BCF: Be yourself, just don't be an arse.

[Kickstart]

Nah, she knows how to ride a bike, but wants some idea of what happens inside the engine beyond "mister petrol meets misses spark and off they go with a bang"

We eventually found a 20 year old book at a bike show which wasnt bad.

All the best

Keith

[McJamweasel]

I could do with sumthing like that - I have a general idea but not much more.
____________________
BCF: Be yourself, just don't be an arse.

[WildGoose]

my dad has a 15 or so year old book

its called the AA book of the car, explains absolutely everything about cars in an idiot proof way, its great, but i couldnt ever find one for bikes, so i know the basic stuff about engines, but nothing bike related

[Zimma]

www.howthingswork.com

enjoy
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-Zimma