9k rpm then drops help (cagiva prima)

TDean122 · Two Stroke Sniffer Joined: 13 Jul 2014 Karma :

After about 30 minutes of driving my cagiva prima 50 around the streets i went along the open road passing 9k rpm in to the power band in every gear then it suddenly dopped to around 4k and bike slowed down i tried going past 9k and rpms dropped and slowed down i tried in each gear with no luck then i got to a quite road i tried again and worked perfect what happend ? Is something ready to go?

Thanks

Dean

Taught2BCauti... · World Chat Champion Joined: 12 Jan 2012 Karma :

I'm not familiar with that model, but I would be checking the wiring between sensors and the CDI/ECU - including stand switches, plus loose spark plug cap, HT lead arcing, etc.

If that checks out, I would then start looking at fuel filters and blocked carb jets.
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unitynotsocri... · Banned Joined: 29 Jun 2011 Karma :

Or a cracked piston ring?
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bikersupermot... · Could Be A Chat Bot Joined: 26 Jul 2008 Karma :

is there any misfiring or back firing / rough running or smoking from the exhaust when the revs drop?
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stirlinggaz · World Chat Champion Joined: 22 Jul 2007 Karma :

TDean122 · Two Stroke Sniffer Joined: 13 Jul 2014 Karma :

Thanks for the replys well i changed out the plug and took it out after more than a hour never had the issue so took it to collage about 30 mins drive no issues plug was pretty ild too

HotdogMcDraw · Scooby Slapper Joined: 06 Nov 2013 Karma :

TDean122 · Two Stroke Sniffer Joined: 13 Jul 2014 Karma :

I meant old it's was last on the road in 05 so who knows how old the plug was

TDean122 · Two Stroke Sniffer Joined: 13 Jul 2014 Karma :

Well when ever I cleaned or replaced plugs it was fine then recently I lost the power band Shocked

I took air box off to notice air filter was dust and everywhere so I took carb off and cleaned it put it together and it ran no power band then it done it again around 9k and dropped checked plug was right colour it's gotten so bad I try drive it slows down won't pick up some times just stalls or picks up then again and need to stop and start it it won't even go 1/2 a mile without the issue now what's up???