Performance dropping off

[SpannerMonkey]

Right, As my PC50 gets hotter, it seems to lose power. Normally it does 32 on the flat, but then it slows down to about 27. If I leave the bike ten mins and go back on it she runs sweet, Any ideas what causes this?
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My bike? A YX140 powered one-off Monkey Bike, something a little different!

[Banned]

You stopped pedalling ...

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BLUEX5 wrote: Good to have you back covdude.
Ariel Badger - I like the moss and the hole !

[Snodvan]

Sorry Span, I can't answer your question but I do know MY performance has been dropping off as well. I just put it down to my age

Snod
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04 (UK Reg) BMW F650cs, but really 02 first Reg in Holland

[SpannerMonkey]

[skatefreak]

Sounds like it could be overheating and this losing power...

just a thought though.

-Jvr

[SpannerMonkey]

[N cee thirty]

knackeredish coil ?
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[lihp]

Is mixture too rich? Runs fine and performs well when cooler when mixture is better richer, but when it warms up, it ends up being too rich.

Possibility if you've not checked the carb yet.

[hazza]

Choke isnt stuck on is it?
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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)

[SpannerMonkey]

[SpannerMonkey]

[N cee thirty]

might aswell replace the condenser and points anyway
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[Avora]

Check the plug colour, would be worth changing it anyways, but it'll give you an idea as to how hot its getting, if the colour is chocolatey brown colour (ideal carb setting), then you might need to change the plug for one a number higher...but if its at the manufacture spec, then its another problem. As the tempreture isn't -1 any more it might just be the carb anyway, my Derbi Senda, I had to change the settings for it to idle. Worth checking the manual though, usually have a troubleshooting part.
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Kawasaki AR125 B8 - Getting ready for a summer time soon!

[SpannerMonkey]

[N cee thirty]

trololol really ? my cg's one was right next to the coil


see if the points are sparking when its running,will tell you if its knackered
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[SpannerMonkey]

[SpannerMonkey]

[N cee thirty]

yerr,its like a little light show in a dark room lol

i'm on about the condenser being knackered btw
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[Avora]

[lihp]

As far as I know, when you're on the main jet/needle, then you're flowing 100% fuel through the pilot jets in addition to what you get from the main. They have less effect at higher revs as it gradually becomes a smaller percentage of the total fuel.

However, it can have an affect, on something that old, it will be worth giving it a clean anyway.

[hazza]

have you asked on www.mopedarmy.com

they were an excellent source of knowledge when i used to run my 72' puch maxi. im sure they have pdf manuals on there too.
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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)

[truslack]

[cloric_tzr]

[SpannerMonkey]

[cb1rocket]

shouldn't the bike be running on some lead replacement additives in the fuel?

Its a 4 stroke isn't it, as far as i'm aware, can't be bothered to read the whole thread again!

Just a thought