Triumphrat

cksean · 06-06-2009, 12:51 PM

my TBS doesn't shift smoothly when cold and it's getting worst and worst...gets better when warmed up tho...bike currently has about 19K miles...is it time for new clutch?

BigAl8295 · 06-06-2009, 12:56 PM

Have you checked your oil level? When is the last time you changed the oil?

MickMaguire · 06-06-2009, 01:17 PM

when was the last time you changed the clutch fluid too?

ssevy · 06-06-2009, 01:33 PM

Sorry, couldn't resist

Have you switched riding boots lately, or changed your grips? Both could affect your shifting, and as you ride and your body adjusts, the shifting might seem better, which would lead you to believe that it is the bike warming up that is the factor. Also, if you have done any work on the bike that might have affected the clutch cable, I would doublecheck that for binding or lubrication needs. As the others have already said, an oil and filter change may yield noticeable improvement (after running Royal Purple and Mobil 1, I switched to Amsoil, and my bike shifts much more smoothly now).

lovecuba · 06-07-2009, 02:44 AM

Quote:

Originally Posted by cksean

my TBS doesn't shift smoothly when cold and it's getting worst and worst...gets better when warmed up tho...bike currently has about 19K miles...is it time for new clutch?

Firstly, try bleeding the hydraulic system and at the same time 'squeeze' out all the old fluid so as to obtain full travel onto the clutch operating rod. Do this according to a workshop manual (Haynes etc)

Also prior to starting in cold weather, select 1st gear, pull in clutch lever and rock bike backwards and forwards. This has the effect of 'breaking' the joint between the clutch plates and allowing the gearbox mainshaft and engine crankshaft to separate drive when pulling the clutch lever in. Clutch should last for many, many more miles providing that you are changing the engine oil regularly with a good product.

jimmyj900 · 06-07-2009, 10:28 PM

A maladjusted or worn chain causes crappy shifting.

Check your chain adjustment for overall slack and also check for tight and loose spots on the chain.

Jim

ssevy · 06-08-2009, 01:45 PM

Quote:

Originally Posted by jimmyj900

A maladjusted or worn chain causes crappy shifting.

Hey Jim, I've never heard that, and am thinking about it? Since the clutch effectively disconnects the engine from the front sprocket, I don't understand how the chain condition could affect the shifting at the moment of actual gear movement when the clutch is pressed. I could see that a worn chain might make the bike buck or stutter a bit upon the clutch being engaged and then released by causing the rpms of the front sprocket to be erratic. Once the clutch is depressed, aren't the engine rpms and drive train rpms out of sync immediately? Is it, then, the unevenness of the drive train revolutions that causes the problem?

BigAl8295 · 06-08-2009, 07:45 PM

A loose or worn chain would give the feel of crappy shifting, because you'd get a lurch when the sprocket puts tension on a loose chain.

jimmyj900 · 06-08-2009, 09:10 PM

Quote:

Originally Posted by ssevy

Hey Jim, I've never heard that, and am thinking about it? Since the clutch effectively disconnects the engine from the front sprocket, I don't understand how the chain condition could affect the shifting at the moment of actual gear movement when the clutch is pressed. I could see that a worn chain might make the bike buck or stutter a bit upon the clutch being engaged and then released by causing the rpms of the front sprocket to be erratic. Once the clutch is depressed, aren't the engine rpms and drive train rpms out of sync immediately? Is it, then, the unevenness of the drive train revolutions that causes the problem?

Loosen your chain and try it.

Jim

ssevy · 06-08-2009, 09:31 PM

Quote:

Originally Posted by jimmyj900

Loosen your chain and try it.

Jim

There's no need to be snotty. I wasn't questioning the accuracy of your information, only trying to understand the why of it. I have learned alot from this forum, and much of it from your posts. Your replies are usually thorough and informative, and your follow up clarifications equally so. Sorry I caught you on a bad day.