Question about 1996 Triumph Trophy 900

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Irgin.netmy trophy will not go past 7000 rpm i have checked the valve clearances and balanced the carbs and the airbox is clean any clues mark

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  • yadayada
    yadayada May 19, 2011

    What is the redline?

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  • 167 Answers

G'day Mark'
I had a look at the parts fisch for your bike-heres the link
http://www.bikebandit.com/1996-triumph-trophy/o/m17544#sch561592

It sounds like maybe it's choking for air.(restricted inlet)
Be sure that the piping to the airbox is not pinched(part no 13) & is not obstructed.
Also make sure that nothing is blocking covering the opening of these pipes.
I notice that the air box seems also to be the filter(bit of a crappy idea-I hope I'm wrong).
But if thats the case, I'd strongly suggest you replace it if its not been done recently.
You may also be able to get an idea of what is going on by removing your sparkplugs & see how they are burning.
Used plugs tell a story.
If there black & sooty it would suggest a rich mixture.(caused by blocked air filter?).
If they are bleached white in the porcilin part then maybe an air leak at the inlet tract(in front of carbs)could be the cause.
The GPZ 750-900R Kawasakis(which this motor is based on) had a tendancy to pop-off or open circuit the sparkplug caps All the time.(giving a weak spark) So you could check these.
Another thing- A blocked exhaust restricts maximum RPM but this is un-likely.
(Unless you are in Australia- A wasp called a mud wasp LOVE to block the ends & inside of exhausts-especially small exhaust outlets-GRRRR- no joke- On 4 motors just this week).

I'm not sure what else to suggest-
Check these things, & if you have no joy let me know & I'll try suggest what to do next.

I hope this has been somewhat helpfull
Kind regards Andrew Porrelli

Posted on May 19, 2011

Testimonial: "cheers Andy it's really bugging me now Taz"

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