New tandem Starts, then stops. Also, hello from Oz
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- Newbie
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- Location: South Australia
New tandem Starts, then stops. Also, hello from Oz
Hello all. Today I aquired a 1984 KR250A tandem + an incomplete spares bike. The "good" bike will start but will only run for a few seconds before it dies. Appears to be fuel related as it will continue to run if ether is sprayed down the filter intake boots. However... fuel does appear to be reaching the float bowls so am somewhat mystified. At this point am wondering if it could be due to bad/old fuel or perhaps blocked jets but I'm sure you lot know a lot more about these bikes especially as this is the first 2 stroke I have owned in many years.
Rebuild 'em and ride 'em.
- ScottaKR
- Premix Junkie
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- Location: Australia
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- the KR kid
- Heavy Smoker
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Try here http://www.kr250.org/KR_home.htm for service info. May help get it up and running.
Stop annoying me, I'm running out of space to hide the bodies!
GS750B
KH250B5
GS750B
KH250B5
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- Newbie
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Mew tandem starts, then stops. Also, hello from Oz.
Thanks again for the further tips. Will try them all. Also, when I go to the manual at the top of the page this appears to be for the parallel twin, but are the carbs the same? Or is there something for the tandems here that I'm missing? Have a couple of jobs I have to do on the CX500 that is my current transport today and also a federal election to vote in here in Oz today. Will it be the scarecrow with the big nose or the tinman with the big ears? Have a good day {night?} and I'll get back later. Cheers.
Rebuild 'em and ride 'em.
- ScottaKR
- Premix Junkie
- Posts: 1521
- Joined: Fri Aug 10, 2007 2:52 pm
- Location: Australia
Yeah, the manual at the top is for the KR1, and the carbs are very different.
If you ask Tim (A.K.A. StrokerBoy) he may be able to help you out with a PDF copy of the correct manual.
If there's any specific details you need in the meantime, just ask and I'll reference my manual for you.
If you ask Tim (A.K.A. StrokerBoy) he may be able to help you out with a PDF copy of the correct manual.
If there's any specific details you need in the meantime, just ask and I'll reference my manual for you.
KR250 Tandem Twin (Naked)
KR1 Red/White
KR1S Track Bike (has been put on hold for now)
ZXR750 H1 (Winter project)
KR1 Red/White
KR1S Track Bike (has been put on hold for now)
ZXR750 H1 (Winter project)
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- Newbie
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Hi again. Little progress made today. About the only thing I've learned for sure is that the problem isn't the fuel tank breather. Have removed and partially dismantled the front carb,-no obvious problems though a few drops of water appeared on the bench top. Float not jammed or anything stupid like that. Screw that holds the float needle seat in place is rusty suggesting a damp environment over a period of time though don't know how significant this is likely to be. Main jet is clear, slide not jammed. Reassembled, refitted with remote fuel supply and ran with no rear plug fitted,- spark tester fitted to lead. Still the same result but is definitely not a spark problem, this thing has one of the healthiest sparks I have ever seen/heard. Time to ponder some more I guess but like many of these things it will probably turn out to be something stupid! [-o< A carbon clogged exhaust couldn't shut a motor down this quickly could it?
Rebuild 'em and ride 'em.
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- Heavy Smoker
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- JanBros
- Avgas Sniffer
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- Newbie
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O.K., thanks for those 2 answers. First off I still tend to think my problem is fuel so will try a more thorough clean out. Secondly, I do not fully understand Janbros post about the spark. The spark at the plugs looks pretty normal but with my spark tester you are looking for a minimum of 5 mm and 10mm is supposed to be very good. also the spark is blue and crisp. Thank you. =D>
Rebuild 'em and ride 'em.
- glidercoach
- Smoker
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Make sure you remove the smaller jet behind the main jet. Clear it out with a small wire from a wire brush, then carb cleaner... A needle is too big to go through it. I just had this problem and missed the smaller jet. The bike runs perfect now! Thanks to all the guys on this forum who gave me support for my ride!
- JanBros
- Avgas Sniffer
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so your spark is good.CXPHREAK wrote: Secondly, I do not fully understand Janbros post about the spark. The spark at the plugs looks pretty normal but with my spark tester you are looking for a minimum of 5 mm and 10mm is supposed to be very good. also the spark is blue and crisp.
I've often found out that people thinck that the more light a sperk gives, the better it is, but it's just the other way round , that's all I was traing to say
My ultimate goal is to die young as late as possible !