Output Shaft Bent etc.

[Joker]

I have described an intermittent, momentary loss of drive elsewhere here. Now my dealer has split the box we have a theory. This shaft is bent;



If you turn the shaft and hold the bearing on the far right a slight wobble can be felt. The gear second from the left is black (according to the tech this was probably an indication it has got hot) as are the two cogs which are behind this shaft. Two of the three selector forks show signs of wear and heat. Some of the dog rings are showing signs of wear.

No signs of damage to this, whatever it's called;



The tech thinks that the shaft is bent because it has been twisted by the sudden and repeated application of power. Is this possible? Would it explain the momentary loss of drive. It always felt as though it was jumping a tooth, but I couldn't work out how this was possible. If the shaft is bent (which it is) is it possible it could jump a tooth and re-engage as it rotates?

It's had 266 bhp going through it via a lock-up clutch for 6000 miles, then 293bhp for another 2000 miles. Have I taken too much slack out of the drive train?

 

[warp9.9]

Brother your getting around today!!!!!!!!

 

[Joker]

Brothr your getting around today!!!!!!!!

Need all the help I can get with this one bro.

 

[Pig9r]

Might be the spring on the output shaft. When accelerating I would feel a momentary loss of power, what I thought was slight clutch slippage but it didn't rev any higher. No clunk either. When I was getting the upgrade kit in the mechanic found that there was not hardly any tension on the output shaft, the spring was shot. Either way it is sold as a complete unit. Triumph replaced it (outside of warranty) along with upgrade kit and head gasket repair all at the same time. If your mechanic wants particulars contact Gus at Baxter Cycles in Marne, IA, USA.

 

[HellFire]

Your saying the spring compresses and allows the gear to "walk" out away from the other one? What a strange design, something like that would put a finite limit on how much power can be put to the ground. Could that be some kind of built in safety thing so if the clutch is dropped at high RPM the rear end doesnt explode?

In order to have a "real drag bike" you would just about have to weld the spline and take the spring out of the equasion wouldn't you?