h100 wont start

[cammy mack]

hi all
ive just spent the last half hour trying to kick my h100 into life. with no result!. ive checked the spark, points and currently got the battery on charge. if that doesn't work, any ideas??
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Yamaha Tdm850
Yamaha fz6

[multijoy]

Fuel tap and fuel (and then the related systems)? If it's sparking and the electrics check out, it's the obvious next step.
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'11 CBF1000A, '99 C90, '98 CB500
silky666: He rode amazingly well considering his bike is the weight of a small van and had slicks on.

[Tristan.]

3 things needed to start a bike, spark, fuel and compression.

if it sparks then clean the plug and kick it over a couple times, whip the plug out it should be wet, if not that's your problem.

If the kicking over feels normal then compressions probably fine, you can do a pikey compression test by sticking your thumb over the hole and turning it over, the compression will be enough that your thumb gets blown off.

Check the air filter and exhaust arent blocked.

Chances are your carb is blocked, when you've done all the basic stuff then give it a clean.

When was it last used and how?

[stinkwheel]

That won't work. The battery has nothing to do with the spark on an H100, they have a self-exciting ignition. It should start and run even with the battery disconected.

Checked the spark, so I assume there was a nice, fat blue spark? If in doubt, change the plug anyway.

After kicking it for half an hour there should be a strong smell of petrol and the end of the plug should be wet with fuel. Is it?

Has it been running recently or is this the first time you started it for a while?
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[lonner]

hi m8

as above

when did it last run as this will help

[cammy mack]

the plug is wet so no probs there,its a new plug thats in it, it was out yesterday for about half an hour but before that it was off road for a few weeks. it has a tendency to start after a few kicks or not at all
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Yamaha Tdm850
Yamaha fz6

[cammy mack]

if the carb is blocked is there any way to check without ripping the bastard off, will nip down and check the fuel pipe going into the carb.
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Yamaha Tdm850
Yamaha fz6

[lonner]

[cammy mack]

just took it iff and examined it. bowl is fine as is the jets. maybe it just had some tiny piece of crap in it(hopefully)
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Yamaha Tdm850
Yamaha fz6

[cammy mack]

hmmm put it back on bike and now petrol is pissing out the drainpipe! fucking bike!!!
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Yamaha Tdm850
Yamaha fz6

[Wil]

Stuck float perhaps, causing the carbs to fill with fuel and then overflow?
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'07 Triumph Speed Four

Aw look, a baby driving a car. And look, there's a dog driving a bus!

[Tristan.]

Probably, twat em with a nylon hammer or the rubber end of a ratchet.

[cammy mack]

you were right wil the bowl was full o fuel. will try and put it back on carefully
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Yamaha Tdm850
Yamaha fz6

[stinkwheel]

If the jets are clean, fuel is getting through and it is making a spark, there is not much else it can be.

Maybe the spark isn't everything it might be. Check the plug cap is in good nick, check the coil is well earthed to the frame, check there is no muck on the connector.

Might also be worth giving the contact faces of the points a clean up with some fine emery paper or a points file.

If you are absolutely happy it is getting fuel and has a spark, maybe check the static timing, there is no seperate adjustment for this, you just set the gap and hope it is in the right ball park. A worn set of points with the correct gap leads to the ignition being too far advanced = Flying machine while running but utter bastard to start.

Points are a piece of piss to change BUT you do need a rotor puller. A genuine Honda rotor pulling tool costs about a tenner, don't even think about trying to do it without one, take it from me, it is simply not worth the hassle.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[cammy mack]

thanks for the input guys
the cnut still wont fire up. ordered a set of points on sunday so will fit them when they appear. really dont want to take the flywheel off. its the only thing it can be as ive checked everything today. in hinsight i should have bought a half decent 125.
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Yamaha Tdm850
Yamaha fz6

[Wil]

Ah, but once it gets going it'll be a barrel of laughs, all 100cc 2 strokes are
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'07 Triumph Speed Four

Aw look, a baby driving a car. And look, there's a dog driving a bus!

[cammy mack]

[lonner]

[cammy mack]

just checked it and defo getting a spark. it must be the points although they look fine and clean. im totally stumped.
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Yamaha Tdm850
Yamaha fz6

[hmmmnz]

[cammy mack]

surely if the plug is wet with fuel then that's a good sign that there is compression?. i will give the carb a good going over tonight
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Yamaha Tdm850
Yamaha fz6

[Wil]

[cammy mack]

just done a pikey compression test seems ok . it was blowing my thumb off the top of the head. checked carb jets and they are ok, as in not blocked. the only optio left to do is change the points. in the words of toyah "oh its a mystery"
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Yamaha Tdm850
Yamaha fz6

[cammy mack]

mystery solved!. bad compression due to ill fitting sparkplug!. something so simple yet totally over looked it. cheers for all the advice
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Yamaha Tdm850
Yamaha fz6

[MaybeGuy]

are you sure its that? could be a stripped or worn thread.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith