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This is for a T100 - but I would think it would be the same for the Thrux.
It's a big SOB .....I think it's a 36mm. I'm going to ck the tool box and see if the monster socket is a 36. As I recall, the largest socket I own was purchased to remove the sprocket nut. Back in a minute ..................................
Yeah, there's a monster sprocket in the toolbox that is a 36mm.
The following may make it easier. Here's a set of notes I wrote immediately after swapping sprockets. Hope this helps.
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Here's a quickie. You might want to search the website for something that goes into more detail if you're not used to working on motorcycles.
Tools required:
-36mm - 1/2" drive socket
-breaker bar - 1/2" drive
-torque wrench capable of handling over 100ft/lb or 132nm
-correct sockets and wrenches to remove sprocket cover
-correct sockets to loosen rear axle so chain can be adjusted
for larger sprocket
Steps (from memory - double check against shop manual)
-bike on centerstand
-sprocket cover removed
-unbend locking tab that secures sprocket nut
-sit in the saddle
-with 36mm socket on breaker bar, reach down and place
socket on 36mm nut
-hold rear brake securely while loosening 36mm nut to keep
countershaft from rotating. It's tight!
-with nut and lock washer removed, pull sprocket off shaft
-lightly grease the splines on the countershaft
-slip new sprocket in chain, and slide sprocket onto countershaft.
-(at this stage, you may have to loosen rear axle to loosen chain
enough to allow you to install larger sprocket).
-make sure sprocket is seated properly on countershaft.
-tighten 36mm nut enough so you can adjust chain. Retighten
rear axle nut and adjuster lock nuts when properly adjusted.
-sit in saddle and hold rear brake.
-using torque wrench set to 132nm or 98ft/lb, tighten 36mm nut.
-bend locking tab against nut flat so it cannot come loose.
If you plan to do your own work, including normal maintenance, I'd recommend purchasing either the Triumph Service Manual, or Haynes Repair Manual.
Note - some of us on the site like to let the engine run a bit faster and ride with the 17T. Others like to run at lower rpm. I personally like the 17T on my 2003 T100. After riding with 18T for 8,000 miles, I switched back to 17T. It suits my kind of riding and the type roads where I spend most of my time (some Interstate, getting to the good two lane roads). 4500-5000rpm at 75-80mph isn't hurting anything. The Bonnie is a relatively short stroke engine, even when compared to my W650 (68mm vs 83mm).
Bob
[ This message was edited by: ohiorider on 2007-05-13 22:56 ]
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2003 T100 (790cc) Lucifer Org and Silv: 122/42 jets, TORs, 17T, UNI filter, no AI, Polaris bellmouth, Metzeler ME880 tires, Progressive 440 shocks (105/150 springs),11-1126 fork springs, gaiters, MotoTwin low bars, 6024 lamp, htd grips, 12v outlet.
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