why so difficult to start?

[hazza]

finaly im 17!!!!!!....had my rxs 100 a few months getting it ready for today and i went to start it and it took quite a few kicks. it will only fire with no throttle and a bit of choke, thing is if i touch the revs it dies. i have to keep the choke on and move it to keep it running for a while before i can touch the revs. this happens even if i leave the bike to stand for an hour. any ideas?. is the fact that the bike is running rich anything to do with this? the bike runs great when its going and starts easy when warm
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[bish777]

Well start by replacing the spark plug, very cheap and eliminates that possible problem.

Seeing as it runs fine when warm and awful when cold, that suggest that the mix is, if anything, a bit lean. This will be exaggerated by the cold weather of late. You could try making the pilot mixture a touch richer. Turn the pilot screw OUT (anti clockwise) by a half turn and see if that helps. When the weather gets warmer youll probably want to screw it back in as it will run rich in the warmer weather.
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GSXR1100J

[hazza]

the plug has blacksooty deposits, i have changed it with no improvement. i thought black soot was rich?
____________________
3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[stinkwheel]

So you start it by putting the choke on and kicking it over. It starts and you need to leave the choke on for a while before you can touch the throttle?

Doesn't sound like anything out of the ordinary to me.

Remember you don't need to kick it over very hard. More pressing down on the lever a few times rather than booting it over. That sort of bike usually starts third kick.

You switching the fuel off when you park it up?
____________________
“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.

[hazza]

yea i turn the fuel off when i park. i plan on changing from the standard airbox to a K'n' N filter will it make much difference?...will i need to rejet...as i THINK its running rich i would imagine i should not mneed to rejet??
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[Richard1987]

you would need to rejet if you go with a k&n filter, but i dont think you will gain much unless you do other mods like exhaust?
Id leave it standard
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[hazza]

yea i may aswell the only exhaust i could find was 175 quid!!!!! im not spendin that much lol. will it make the bike sound much different?...its kinda loud atm because i only have half a baffle
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[Richard1987]

yea it will sound different, different design in chambers and baffles etc. how much did you pay for the bike?
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[hazza]

£100 quid as a bit of a wreck. i striped the engine and replaced teh piston, rings and crank seals, new clutch the lot, so its stil bein run in....i would say spent about 250 on it but its mint now
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[Richard1987]

cool, my H100 still isnt back on the road since the crank bearings went on me like 6 weeks ago mabye more
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[hazza]

stupid question...how do you know they have gone? cos im worried mine have gone...making a noise in the engine like when you kick it over....you know the noise when it dosent fire?...well i can hear a noise like that when its running
____________________
3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[Richard1987]

i could always hear a slight churning noise when mine was, when mine went, my engine just siezed, they stoped the engine from turning over
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[hazza]

did it lock your wheels up?...much damage? i mite get another engine if miune are gone, aparently they sell for about £50.....easyer than splitting the crankcases and quicker to swap
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[Richard1987]

it locked my wheel up for a small moment before i pulled the clutch in, but i was only going like 5mph. i had just come back from a 7 mile trip? i think that just killed them off
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[hazza]

how long did the churning noise last until the lockup?...i dont know what to do about this lol ive only been riding it 4 2 days but put 54 miles on it
____________________
3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[Richard1987]

i just assumed it was its normal running noise. i had it for 5 months and put about 3k on the clock

Ive not heard it run yet after doing all the work
so it might still sound the same ... oh how i miss that sound
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[hazza]

did you do the work yourself?...hard?...is your bike similar to mine?...i know kawasaki do 1 almoist the same
____________________
3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[Richard1987]

i had someone do the bearings, you have to heat the crankcase up with oxy - ascetalyne which i dont have,

The h100 looks very similar. ive never owned a RXS100 but just look at the pics
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[stinkwheel]

There is a fair bit of difference between an H100 and an RXS100. The RXS has disc-valve, crankcase induction. The H100 has piston porting and reed valves.

I wouldn't go fannying about with K&N filters until you are sure the bike is running perfectly in standard trim.
____________________
“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.

[Richard1987]

oh yea, i think ive seen them before with a K&N cone filter poking out from the crankcase?
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[hazza]

what do you heat the crankcase up for?
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3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)

[Richard1987]

the metal expands under the heat, not holding the bearings in as tight
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[stinkwheel]

You can fit main bearings by putting the crankcase in the oven till it is 'Jesus hot' (touch it and you will know how hot this is) and the bearings in the freezer. You then quickly seat them and tap them in square using a big socket and extension bar on the outer race.

From previous experience, it is best to do this when your mum is out all day because you will get your head to play with if she finds you with half an engine in her oven.

Or you take the crankcase halves and your new bearings along to a half-decent local garage and say "Excuse me mister, could you put these bearings in with your press please?" Then (most important) when he says there is no-charge, give him some beers, I would consider pressing main bearings into already prepped crankcase halves a 'four bottles of stella' job.
____________________
“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.

[Richard1987]

bet burning gearbox oil stinks smells bad enough when its fresh
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[hazza]

if/when the bearings go do you think sort that engine or shove a new engine in?
____________________
3 Honda NC50's(Sold)-->'72 Puch Maxi S (Sold, want it back!)--> '90 Yamaha RXS 100 (Stolen)--> '87 Honda Cub 90(Sold) --> '95 Kawasaki Eliminator (Sold) --> '98 Bandit 600 (Sold) -->'07 SV650S (Current)