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rider 950
90cc 2 stroke / 110 4 stroke
Joined: 02 Feb 2010
Posts: 92
Location: nt
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 Posted: Wed Oct 05, 2011 3:58 pm Post subject: TRX450R/05 Engine breaking down |
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Hi everybody, have a problem with a trx450 05 model breaking down under load and at this stage have had a number of things done but still the same .
So far the following items have been changed
Carby
Wiring Loom
Fuel Tank
Muffler
Coil
Airbox
Standard cam re-fitted
Has also had stator & cdi tested all ok
Also had a top end rebuild
Bike starts & runs perfect until under load
Hour meter & lanyard have also been disconnected
Any help would be appreciated Thanks Wayne |
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Dino
The Day Starts With OZATV !
Joined: 19 Aug 2009
Posts: 1503
Location: Brisbane QLD
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| Posted: Wed Oct 05, 2011 4:05 pm Post subject: |
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Possibly a sensor, like gear position, that is sending a wrong signal to the CDI, causing the rev limiter to come in?
Adjusting, cleaning, changing out and sometimes disconnecting them can fix it.....
_________________
Remember. We elect politicians, but we have to deal with bureaucracy.
Notice that crazy in the bureaucrats. |
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PeteW
Moderator
Joined: 09 Feb 2006
Posts: 1877
Location: Doreen, Vic
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| Posted: Wed Oct 05, 2011 9:52 pm Post subject: |
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Is the cam timing spot on, it is possible on those motors for the cam to be a tooth out and it will still run perfectly until you load it up.
wen you say that is breaks down under load is it from take off or is it not until further up the rev range?
_________________
www.thumbpump.com
www.dirtcomp.com.au |
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rider 950
90cc 2 stroke / 110 4 stroke
Joined: 02 Feb 2010
Posts: 92
Location: nt
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| Posted: Wed Oct 05, 2011 11:08 pm Post subject: |
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[/quote Is the cam timing spot on, it is possible on those motors for the cam to be a tooth out and it will still run perfectly until you load it up.
wen you say that is breaks down under load is it from take off or is it not until further up the rev range?
Hi Pete ,
They have tried it with the original cam still the same , it was doing this prior to the top end rebuild .
It starts to breakdown mid way through the rev range and the higher the gear the lower revs it starts to breakdown .
Thanks Wayne |
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doel#20
Blaster class
Joined: 18 Nov 2008
Posts: 155
Location: nw tassie
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| Posted: Thu Oct 06, 2011 6:48 pm Post subject: |
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| Hey Mate .. might be worth checking all the earth points on the bike, i had a Banshee a long time ago that was doing very similar things to what you have described and it took me ages to work out what it was, turned out it was a bad earth on the kill switch that the previous owner had fitted to the bike |
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