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SPARK PLUGS FOULING HELP (Mc18 250 1989)


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gavster

 
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SPARK PLUGS FOULING HELP (Mc18 250 1989)

Thu Jan 22, 2009 10:19 am » Post: #1 » Download Post

HI , wondering if anyone can help me out , This is my story ,bought bike after mate had it one day.He smashed it up. I have Slowly rebuilt, its going FINAL !!!!, BUT that lasted all of thirty mins. Throttle stuck on max rev s. Took it a part to find it only had one cable . ANY way fix that , now bike runs good for bout one min and plugs are oilly.it loses power What s wrong ,on a tight budget, can anyone help please.Has putting the missing cable messed up the way oil pump delivers mix???. Hope this posted in right place
mc18 1989

Admin: Moved to NSR Discussion.

Please state the model of NSR and any modifications please. We can't expect people to guess!
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lam.666

 
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Thu Jan 22, 2009 8:41 pm » Post: #2 » Download Post

don't think by adding the missing throttle cable would affect the oil pump cable, when i had a problem with the bike starting and keeping revs my pulser coils were dirty, cleaned them up and it was all ok

are you cleaning up the plugs after you inspect them? some carb cleaner and a brass wire brush does wonders

do a search for pulser coils and you should be able to find the link to what the coils look like

gl
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gavster

 
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fouling plugs mc18 250

Thu Jan 22, 2009 11:35 pm » Post: #3 » Download Post

Have just adjusted the oil pump index to correct postion. and done some cleaning to what looked dirty on pulser coils . Man its not easy, learning on the, patience is so thin.Its my fisrt bike hanging out for a ride .And hitting brick walls.Only had a tease.
I think i made things worst it feels like heaps of pressure is building now and it splutters now,and wont idle .

DID clean plugs and even got a new set , didnt help.
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gavster

 
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Wrong petrol

Fri Jan 23, 2009 12:43 am » Post: #4 » Download Post

The other concern I had was running motor on 91 for an hour , before I read on line that was the wrong fuel type . could that stuff the motor in that short time. MAN i hope not.

How do I post photos ?
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shaned75

 
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fouling plugs

Fri Jan 23, 2009 1:07 pm » Post: #5 » Download Post

I`d clean your carbs and tank , if cloged you will get high oil-fuel mix as pump still puts out same oil
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apexxn

 
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Fri Jan 23, 2009 7:09 pm » Post: #6 » Download Post

I am understanding you right that it stuck at wide open throttle. Was that when you first started it and it was cold? I would be concerned about that and would do a top end check.
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Max szeged

 
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Sat Jan 24, 2009 3:16 pm » Post: #7 » Download Post

yes clean your carbs, and check if there are rust inside! and maybe you are missing springs on your carbs because normaly they close on there own! plus i think if your engine reved high when it was cold you might have broken the poor thing!
1st cleaning the carbs cost nothing but you might want to replace the screws with something harder.
2nd strip the chambers to see inside the piston for damage or make a compression test before you do that if you want. you can see also if the RC valve is ok too, wrong positions will also foul your plugs.
3rd go to premix before testing again at least it will protect you if your oil pump is not working well.
hope this helps! and be patient its not like the weather is going to let you go anywhere fo at least a few months.
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Max szeged

 
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Sat Jan 24, 2009 3:26 pm » Post: #8 » Download Post

oops you are in NZ its prime time for you, but be patient anyway! it will save you more money. doing anything too fast will cost you a lot extra.
be patient on the bike but if the shops stall on you dont go easy on them!
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gavster

 
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THank you for replys Max ,ape,shan

Sun Jan 25, 2009 4:49 am » Post: #9 » Download Post

I am going to do the clean of carbs hope it helps.Looks like a tough job?.
My bike got kicked over last night ,Things just got worst,Gear lever broken
gear shifter bent ,.Have fixed lever .
BUT theres oil ever where.
What happens when a bike is left on its side? , I will top up lost oil?
Is there anything esle that I will need to do.
Worried as I dont want to seize motor.
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Whendee

 
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Cursed

Sun Jan 25, 2009 5:18 am » Post: #10 » Download Post

I don't have any advice, but am concerned, is it you or the bike that's cursed? How could it get kicked over??
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Andy
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Sun Jan 25, 2009 5:51 am » Post: #11 » Download Post

There are some real morons out there gavster! Sorry to hear about that.

There won't be any problems with it being on its side, other than the scrapes/leaked fluids/bent and broken bits etc. With the correct carb (or fuel injection) a 2-stroke can actually run at any angle... even upside down, so being on its side whilst not running certainly isn't a problem.

Remember to check the coolant level. If some of the coolant has drained out of the expansion bottle overflow, the last thing you want is to get it running again and then find it overheats and seizes!

You've still not told those offering some ideas if you've cleaned the carbs and checked the jetting. It also helps if you describe any modifications that may effect setting it up.

And welcome to the forum Whendee.
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gavster

 
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BIG THANKS TO REPLYS

Sun Jan 25, 2009 8:58 am » Post: #12 » Download Post

ANDY I love this site so glad I found it ,makes me feel like I have a real gem the more I learn about nsr s. I have not looked at carbs yet but will do tomorrow will let you guys know how it goes.

My partner kicked my bike over and key my whole car . Only thought that happen on movies/oh well at least im in one piece. CANT WAIT TILL I can RIDE FREEDOM !!!!!!!!!!.

Soon as I can work out how to post photos will do.Im proud of my bike
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David19

 
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Mon Jan 26, 2009 12:09 am » Post: #13 » Download Post

I hope that is ex partner now!
It doesn't just happen in movies; with me about once a year.
I had a 'partner' last week whose other 'partner' visited my house and stole some brembo items and my tyga maggot exhaust clamp?

Good luck with the carbs; I see a guide to carb cleaning has just been posted.
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Whendee

 
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Mon Feb 09, 2009 8:19 am » Post: #14 » Download Post

I also had to clean the carbs, I had an excess fuel problem, spilling out the drain pipes till it drained my fuel tank dry,... it worked!! with minor adjustments to the floats.
And Yes, hope it's an EX partner now. Smile
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