OK, now that I have your attention....I purchased a used 1998 Trophy a couple weeks age from a very nice computer geek who was being transfered back to the USA from near toronto . The bike idled on three cylinders (btw its a 1200 )and also misfired under load. Fixes were clearing a plugged pilot jet and replaced coils with a set of nologys. Did a bunch of wiring for GPS etc. then lost the circiut that controlled the heated grips, which apparently is unfused! Found a chafed wire and a melted relay, for some reason all of the wiring was lashed very tightly to the metal mounting points.
The bike runs very well now but I was getting mileage in the upper 30s corrected to US gallons, correct NGK plugs had great colour, so the bike was not overly rich on jetting.
A little more research revealed that this motor (and the 900) is delivered with only 5 degrees of initial spark advance. The normal range for an engine with this bore/stroke is about 10-12 degrees. i reckon this may be part of Mr. Bloors concession to absolute reliability by conservative tuning on these early models. I'd probably do the same if it was my $120 million on the line also.
So I took off the trigger coil, made some quick calculations and milled the mounting plate .120" to give me 10 degrees advance. The bike started up right away, needed more choke and pulled a couple extra pounds of vacuum at idle. Idle speed increased only slightly.
On the road it pulled better especially right off idle,great to have the xtra grunt but even more so that beautiful linear throttle response. What is more noteworthy is at cruising speeds significantly less throttle opening is needed to maintain a given road speed. No pinking has been heard, still using regular grade gas.
Unfortunately, I broke the throttle cable about 100km into the ride. Thankfully, the manual idle speed adustment allowed me to set idle at a very nice 7500 RPM which gave 105km/hr on the 401 highway home.
Will find a new cable or repair mine but off to the Barber vintage festival next week (triumph is the featued marque this year)
But I will have accurate mileage figures at some point in time. Will probably go to a set of NGK 9 series plugs which are the alternate colder heat range plug.
The bike runs very well now but I was getting mileage in the upper 30s corrected to US gallons, correct NGK plugs had great colour, so the bike was not overly rich on jetting.
A little more research revealed that this motor (and the 900) is delivered with only 5 degrees of initial spark advance. The normal range for an engine with this bore/stroke is about 10-12 degrees. i reckon this may be part of Mr. Bloors concession to absolute reliability by conservative tuning on these early models. I'd probably do the same if it was my $120 million on the line also.
So I took off the trigger coil, made some quick calculations and milled the mounting plate .120" to give me 10 degrees advance. The bike started up right away, needed more choke and pulled a couple extra pounds of vacuum at idle. Idle speed increased only slightly.
On the road it pulled better especially right off idle,great to have the xtra grunt but even more so that beautiful linear throttle response. What is more noteworthy is at cruising speeds significantly less throttle opening is needed to maintain a given road speed. No pinking has been heard, still using regular grade gas.
Unfortunately, I broke the throttle cable about 100km into the ride. Thankfully, the manual idle speed adustment allowed me to set idle at a very nice 7500 RPM which gave 105km/hr on the 401 highway home.
Will find a new cable or repair mine but off to the Barber vintage festival next week (triumph is the featued marque this year)
But I will have accurate mileage figures at some point in time. Will probably go to a set of NGK 9 series plugs which are the alternate colder heat range plug.
