Triumph Trophy 1200 1998 Mikuni Carbs.

Is the engine running badly? if not changing them is not really going to achieve much on its own.

 

According to my Owner's Handbook of 1995, Mikuni BST 36mm flat slide CVs were fitted across range (Tridents, Trophies, Daytonas etc.) at that time, although there is no mention of Thunderbirds or Tigers in the book - probably a different one for those models.

 

Probably some benifit from fitting normal slide carbs for better response and go up to 38mm if you fit a decent free flow exhaust...if you like a few more revs throw some cams at it and go to 40mm...some of the older GSXR carbs may well fit.

 

Lift the caps off the carburetors , find the vacuum bypass port and drill it out a smidgen ! Then lift the needles about 30,000 to 50,000th's of an inch ! With a K&N or similar air filter and a free flowing exhaust , This is the cheapest performance enhancing mod you can do !
Carburetion is close to best optimum ! Just slightly restricted because of Emissions legislation and restrictions ! Did this mod on my 94 Trident , went from great too awesome ! Could out accelerate Daytona's and Speed triples , and had better top speed than any of the T300 based Triumphs .

 

@Pike did you change anything with your carburation ? Or have you settled for standard settings ?
Trident cam profile and timing was the best for all round performance , 1992 -1996 were best , the mod I suggested quickens throttle response and adds hp/torque for little outlay ,just some time and effort. Can take a couple of attempts to get needles set right heights .

 

Pike
Its a nice piece of bike. Wish you luck with the rest.
Regards
Joe.