Time to replace chain/sprockets, help requested! - Page 3 - Triumph Forum: Triumph Rat Motorcycle Forums
Air Cooled Twins Talk Discussion of Hinckley Triumph Twin related matters and topics.

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post #21 of 32 (permalink) Old 02-24-2019, 08:49 AM
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I have 25,000 miles on the original chains and sprockets on an 06' scrambler and they still look good. I am getting ready to change the tires and thought I would replace them but think I could easily get 5,000 more miles from them so will leave them fitted.
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post #22 of 32 (permalink) Old 02-24-2019, 08:45 PM
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Riding around NYC you will hate the 19T front.

I hate it and I'm 60 miles north of you. Makes for slow take off.

Go with the stock 18T front - Triumph knew what they were doing when they built the bike.
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post #23 of 32 (permalink) Old 02-25-2019, 05:58 PM
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Quote:
Originally Posted by Sal Paradise View Post
Riding around NYC you will hate the 19T front.

I hate it and I'm 60 miles north of you. Makes for slow take off.

Go with the stock 18T front - Triumph knew what they were doing when they built the bike.


To each their own. I love my 19t but then again I know how to synch the clutch and throttle for quick take offs.

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I'm no Gynecologist but hey I'll take a look.
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post #24 of 32 (permalink) Old 02-25-2019, 06:31 PM
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Go with the stock 18T front - Triumph knew what they were doing when they built the bike.
The 18T is already a "step up". It was a 17T with the 790 motors pre-2007. When they went to the 865 they stepped up that sprocket to handle all those extra HP.

IIRC.
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post #25 of 32 (permalink) Old 02-25-2019, 07:59 PM
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The motor is a buzzy little devil and if you look at the torque/hp curve they are both pretty linear and close to parallel.

If you increase the front sprocket to lower rpms you are lugging the motor a bit. Probably not enough to hurt much but the Triumph motors are not famous for low end torque.

I just use better ear plugs and forget about the buzzy motor.

But while we are on the topic, do aftermarket sprockets come with a rubber damper built in or are they solid metal?? Reason I am asking is the Triumph engineers put that damper in there to protect the output shaft from excessive banging from an undampened sprocket. At least I assume that.

For those of you with an aftermarket undampened front sprocket can you feel the difference? Anyone out there with a lot of miles on an undampened front sprocket?

Also, I have not taken mine apart yet but is the rear sprocket mounted in dampers too?
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post #26 of 32 (permalink) Old 02-25-2019, 08:20 PM
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The aftermarket front sprockets do not come with the rubber damper. I believe the rubber damper is for sound dampening. I have run a 19t for years I can feel no difference. It is such a pleasure to cruise 70mph and not be wishing for another gear. With proper throttle clutch control there is no lugging.

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post #27 of 32 (permalink) Old 02-25-2019, 10:19 PM
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...is the rear sprocket mounted in dampers too?
No.

Edit: Wait a second... are you referring to the cush drive?



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post #28 of 32 (permalink) Old 02-28-2019, 02:33 AM
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Just to add my 2 cents . . . Yes, it's 36mm on the sprocket & yes, you'll need at least an 18" breaker bar & yes, keeping chain attached while mashing on the rear brake is an excellent tip.

I got 25k miles out of my chain and could have gotten more, but was coming on a long road trip, better safe than sorry.

Went with the 19t front sprocket. Haven't noticed any appreciable loss of zip, but the speedometer now reads true. Didn't replace the rear sprocket b/c unlike the front sprocket, there was no appreciable wear on it. Looked brand new. Makes sense to me. The rear sprocket makes approximately 1 revolution to 4 for the front one. Ergo, the front sprocket should wear out 4 times as fast!

Big proponent of regular chain maintenance. I use the DuPont teflon lube about every 350-400 miles. Doesn't sling dingle berries all over the bike & the chain & sprockets do great.

HTH
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post #29 of 32 (permalink) Old 02-28-2019, 11:11 AM
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Originally Posted by gunny_hiway View Post
Just to add my 2 cents . . . Yes, it's 36mm on the sprocket & yes, you'll need at least an 18" breaker bar & yes, keeping chain attached while mashing on the rear brake is an excellent tip.
These are good tips. I bought an electric impact wrench for the job and now I'm glad I have it in the garage. It was a good investment, use it quite a bit. Makes removing this, and the nut holding the clutch basket, a breeze


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post #30 of 32 (permalink) Old 03-01-2019, 06:26 PM
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Tim:

I had a 2012 T-100 and never changed the sprockets and chain and the dealer did the 24K service and the chain was fine. I traded the bike in a few thousand miles later on a T-120 but that's another story.

The one major mod I did was after the first year I replaced the OEM shocks and springs with Hagon shocks and Progressive springs. It was like a new bike with a real suspension. If it were me, that's where I'd put your money. Otherwise, I agree with most of the prior posts.
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